CN101215301A - Full process cleaning production pollution prevention method for xylose and xylitol - Google Patents
Full process cleaning production pollution prevention method for xylose and xylitol Download PDFInfo
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- CN101215301A CN101215301A CNA2008100137121A CN200810013712A CN101215301A CN 101215301 A CN101215301 A CN 101215301A CN A2008100137121 A CNA2008100137121 A CN A2008100137121A CN 200810013712 A CN200810013712 A CN 200810013712A CN 101215301 A CN101215301 A CN 101215301A
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- xylitol
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 title claims abstract description 22
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000000811 xylitol Substances 0.000 title claims abstract description 22
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 title claims abstract description 22
- 229960002675 xylitol Drugs 0.000 title claims abstract description 22
- 235000010447 xylitol Nutrition 0.000 title claims abstract description 22
- SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 title abstract description 40
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 title abstract description 20
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 title abstract description 20
- 238000004140 cleaning Methods 0.000 title abstract 4
- 230000002265 prevention Effects 0.000 title description 2
- 239000011347 resin Substances 0.000 claims abstract description 64
- 229920005989 resin Polymers 0.000 claims abstract description 64
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 238000005342 ion exchange Methods 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 13
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000009835 boiling Methods 0.000 claims abstract description 7
- 239000012267 brine Substances 0.000 claims abstract description 7
- 238000011010 flushing procedure Methods 0.000 claims abstract description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 7
- 150000001450 anions Chemical class 0.000 claims abstract description 6
- 125000002091 cationic group Chemical group 0.000 claims abstract description 4
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 42
- 229960003487 xylose Drugs 0.000 claims description 37
- SRBFZHDQGSBBOR-LECHCGJUSA-N alpha-D-xylose Chemical compound O[C@@H]1CO[C@H](O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-LECHCGJUSA-N 0.000 claims description 21
- 230000007062 hydrolysis Effects 0.000 claims description 10
- 238000006460 hydrolysis reaction Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 5
- 238000010612 desalination reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 230000029087 digestion Effects 0.000 claims description 3
- 239000006210 lotion Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract description 17
- 239000000126 substance Substances 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 4
- 238000011033 desalting Methods 0.000 abstract 2
- 150000002500 ions Chemical class 0.000 abstract 2
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 238000011049 filling Methods 0.000 abstract 1
- 239000013056 hazardous product Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000009991 scouring Methods 0.000 abstract 1
- 239000002893 slag Substances 0.000 abstract 1
- 239000006228 supernatant Substances 0.000 abstract 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 4
- 229930006000 Sucrose Natural products 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 239000005720 sucrose Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000008103 glucose Substances 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 241000209149 Zea Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 241000609240 Ambelania acida Species 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005183 environmental health Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 230000002101 lytic effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 235000019605 sweet taste sensations Nutrition 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a process for preventing pollution of xylose and xylitol total flow process cleaning production, which comprises the steps of water scouring, boiling, hydrolytic decomposition, filtering, ion exchange and condensation, wherein flushing cationic resin column and anion resin column with ionized water after finished ion exchange step to remove residual and disintegrated resin in resin layer, filtering out solid foreign substances in anion resin flushed solution and ion resin flushed solution through filtering process, detecting the concentration of metal salt in solution after removed solid foreign substances, respectively filling in HCL and NaOH and the concentration of HCL or NaOH reaches to 3-5% when the concentration of salt is lower or equal to 2%, and reusing cleaning solution after regulated to flush resin column, mixing anion resin flushed solution and ion resin flushed solution when the concentration is higher than 2%, desalting solution by desalting film, thereby obtaining strong brine and supernatant. Hazardous material such as waste water and waste slag which is generated in the production process of xylose and xylitol is completely eliminated through adopting the technical scheme, and the total flow process cleaning production is realized, therefore xylose production enterprises become environment-friendly enterprises.
Description
Technical field
The present invention relates to the method that a kind of wood sugar and the cleaner production of Xylitol whole process are prevented and remedied pollution.
Background technology
Wood sugar, formal name used at school five-carbon ring aldehydo sugar, profile is a white crystal, and its sugariness is equivalent to sucrose, and heat is lower than glucose, edible back cool taste.Xylitol is made by the wood sugar hydrogenation, is white crystal, and appearance is similar with sucrose, is sweeting agent the sweetest in the polyvalent alcohol, and flavor is cool, sugariness is equivalent to sucrose, and heat is equivalent to glucose.Being following sweeting agent, is sucrose and glucose substitute.Xylitol is a kind of sweet taste substance with nutritive value, also is the normal intermediate of human body sugar metabolism.At occurring in nature, Xylitol extensively is present in various fruit, the vegetables.The commodity Xylitol is with in the agricultural crops such as corn cob, bagasse, makes through deep processing, and be a kind of sweeting agent of natural health.At present, have severe contamination in the production process of wood sugar and Xylitol, mainly show following several respects: contained xylose solution fails to be used in hydrolysis residue and the hydrolysis residue, and the sepage stink is unpleasant in the air storage, and is seriously polluted; In and operation can produce a large amount of calcium sulfate, bleaching process produces a large amount of activity charcoal powders, these calcium sulfate and activity charcoal powder also can cause environmental pollution as processing and utilizing in addition not; Resin regeneration produces a large amount of HCL, NaOH, and multiple salts solution, will not cause water to pollute if do not add to handle to discharge; There are a large amount of impurity in the crystalline mother solution, are directly used in the quality that foodstuff production gently then reduces product as not removing, heavy then be detrimental to health.As application number is that 03110852.0 Chinese patent application " extracting the method for wood sugar and Xylitol from crop stalk " discloses a kind of to be raw material with the crop stalk, to produce the method for wood sugar and Xylitol through steps such as raw material pulverizing, washing, boiling, hydrolysis, filtration, ion-exchange, evaporation concentration, spraying dryings.Though this method is produced wood sugar and Xylitol has certain advance, the waste water, the waste residue that produce in producing have bigger contaminative to environment, can the serious harm environmental health as not handled.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome the wood sugar of above-mentioned pollution problem and the method that the cleaner production of Xylitol whole process is prevented and remedied pollution.
For achieving the above object, the present invention adopts following technical scheme:
The method that wood sugar of the present invention and the cleaner production of Xylitol whole process are prevented and remedied pollution, comprise raw material pulverizing, washing, boiling, hydrolysis, filtration, ion-exchange, concentrate each step, it is characterized in that: after ion-exchange step, wash cationic resin column and resin anion(R.A) post respectively with deionized water, remove foreign material and broken resin in the resin layer, obtain behind the positive resin wash liquid and negative resin respectively and wash back liquid; Filter out liquid and negative resin behind the positive resin wash respectively with filtering method and wash solid impurity in the liquid of back, remove after the solid impurity wherein, detect the wherein concentration of metal-salt, when the concentration of salt is less than or equal to 2%, add HCL in the liquid behind the resin wash on the sunny side, after negative resin is washed, add NaOH in the liquid, make the concentration of HCL or NaOH reach 3-5%, will adjust later washing lotion again and be used as the repeated use of flushing resin column; When the concentration of salt is higher than 2% in the liquid after liquid or negative resin behind the positive resin wash are washed, liquid and negative resin behind the positive resin wash are washed back liquid to be mixed, again through the desalination membrane desalination, obtain strong brine and clear liquid respectively, strong brine is used to evaporate salt manufacturing, clear liquid adds HCL or NaOH, is respectively applied for positive resin of flushing or negative resin.
At digestion process, be with 110-135 ℃ high-temperature water boiling 2 hours; The sulfuric acid concentration that uses in hydrolytic process is 0.5%-0.7%, and concentration of hydrochloric acid is 0.2-0.3%; At filtration step, adopt the three-stage filtration method, one-level is filtered 5-1 micron, cascade filtration 1-0.5 micron, three-stage filtration 0.01-0.001 micron.
Adopt this technical scheme, utterly destroyed the objectionable impurities of contaminate environment such as the waste water that produces in wood sugar and the Xylitol production process, waste residue, reach the standard of whole process cleaner production, make xylose production enterprise become environment-friendly type enterprise.
Embodiment
The method that wood sugar of the present invention and the cleaner production of Xylitol whole process are prevented and remedied pollution, with common production wood sugar and Xylitol process is prototype, processing parameter by reasonable each stage of adjustment also increases the regeneration of the ion exchange resin post after the ion-exchange and the harmless treatment of regenerated liquid, reach to reduce and pollute, so free of contamination purpose.It is as follows specifically to improve one's methods.
A) at washing, digestion process, adopt the method for hot-water extraction and washing, separation and Extraction comes out to be used to produce fertilizer with the raw material after pulverizing such as the submember in the corn cob--solid except that Mierocrystalline cellulose, xylogen, pentosan and liquid component--, avoids the residue contamination environment.Concrete grammar is, the processing of--immersion--stranding mill destroys cell walls with raw material pulverizing, makes raw material no longer contain liquid; Use 110-135 ℃ high-temperature water boiling 2 hours again, submember is separated, the method that washes with water is removed submember, obtains purified main component Mierocrystalline cellulose, xylogen and pentosan as hydrolysis material;
Can use one, two, three filtration method, filter step by step, reclaim submember, so both can guarantee the pure of filtrate, can avoid too big solid particulate to stop up filter screen again.Filtrate filtered is reused aborning, avoids the contaminated wastewater environment.
B) in hydrolytic process, adopt the low acid-hydrolysis method of high temperature.Specific practice is: improve hydrolysis temperature more than or equal to 110 ℃, between 110-135 ℃, be incubated 2 hours; Simultaneously, reduce acid concentration, use vitriolic concentration to be 0.5%-0.7%, the concentration of hydrochloric acid is 0.2-0.3%.The result who does like this is, hydrolyzed solution purity height, and it is low to contain acid concentration.Hydrolysis residue is purified corpus fibrosum and xylogen, can be used as the development of raw materials related products.Avoid depleted corpus fibrosum and xylogen contaminate environment.
C), the hydrolysis xylose solution is filtered purification through one, two, three at filtration step.One-level is filtered the 5-1 micron, cascade filtration 1-0.5 micron, and three-stage filtration 0.01-0.001 micron, like this, and can be with tiny solid substance, pigment is removed, and obtains the high xylose solution of purity level, and the solid substance that filtration is held back can be used to produce bio-feritlizer and be used.This step has been removed neutralized reaction product calcium sulfate in the old technology and decolouring its lytic activity carbon dust, has also reduced the loss of xylose solution.
D) in ion-exchange step
In wood sugar, the pure industry of wood sugar and other chemical industries, the technology of every use ion-exchange all can produce pollution in the resin regeneration process now, all must administer.Adopt positive resin and negative resin to adorn post respectively in the xylose production and carry out ion-exchange, in order to remove metal ion and the various acid group in the xylose solution.After ion-exchange, wash cationic resin column and resin anion(R.A) post respectively with deionized water, remove foreign material and broken resin in the resin layer, obtain behind the positive resin wash liquid and negative resin respectively and wash back liquid; Filter out liquid and negative resin behind the positive resin wash respectively with filtering method and wash solid impurity in the liquid of back, after removal solid wherein is assorted, detect the wherein concentration of metal-salt, when the concentration of salt is less than or equal to 2%, add HCL in the liquid behind the resin wash on the sunny side, after negative resin is washed, add NaOH in the liquid, make the concentration of HCL or NaOH reach 3-5%, will adjust later washing lotion again and be used as the repeated use of flushing resin column; When the concentration of salt is higher than 2% in the liquid after liquid or negative resin behind the positive resin wash are washed, liquid and negative resin behind the positive resin wash are washed back liquid to be mixed, again through the demoulding desalination, obtain strong brine and clear liquid respectively, strong brine is used to evaporate salt manufacturing, clear liquid adds HCL or NaOH, is respectively applied for positive resin of flushing or negative resin.So just can reuse the waste liquid that produces in the ion exchange process, avoid the discharging of waste liquid contaminate environment.
E) at enrichment step:
Maximum power consumption is 5% xylose solution in the xylose production, and reduction vaporization is concentrated into 35%.
Present method adopts cold concentration technology and equipment, promptly adopts reverse osmosis membrane that the hydrolysis xylose solution is concentrated into 40-50% by starting point concentration, greatly reduces to concentrate power consumption.
F) spraying drying, the cancellation mother liquor is received wood sugar entirely.
Old technology adopts evaporation concentration to xylose concentration 75%-80%, and crystalline xylose is extracted in crystallization, centrifugation, and the impurity major part is stayed in the mother liquor.Present method reaches 40-50% with cold concentration technology with xylose concentration, and spray-dried more full receipts wood sugar does not have mother liquor, and the prerequisite that adopts this method is the contaminant removal in the xylose solution, based on very high purity, and foreign matter content is lower than the finished product standard.Removal of contamination guarantees high purity, and this method is finished by two measures: the non-sugared impurity in the raw material is removed in high-temperature water extracting and washing; Remove neutralisation of sulphuric acid and decolouring activated carbon, stop to introduce tramp material in the technological process, cause foreign matter content extremely low.
So far, use this method raw material availability 100% in xylose production, do not have the discharging of residue solid substance.Waste liquids such as water, HCL, NaOH, NaCL are through purifying, and recycling does not have discharging.Realized the whole process cleaner production, really reached zero release, made xylose production enterprise become environment-friendly type enterprise.
The wood sugar hydrogenation can be produced Xylitol, and along with the realization of wood sugar prevention and cure of pollution, Xylitol is realized the whole process cleaner production equally.
Claims (2)
1. wood sugar and the cleaner production of the Xylitol whole process method of preventing and remedying pollution, comprise raw material pulverizing, washing, boiling, hydrolysis, filtration, ion-exchange, concentrate each step, it is characterized in that: after ion-exchange step, wash cationic resin column and resin anion(R.A) post respectively with deionized water, remove foreign material and broken resin in the resin layer, obtain behind the positive resin wash liquid and negative resin respectively and wash back liquid; Filter out liquid and negative resin behind the positive resin wash respectively with filtering method and wash solid impurity in the liquid of back, remove after the solid impurity wherein, detect the wherein concentration of metal-salt, when the concentration of salt is less than or equal to 2%, add HCL in the liquid behind the resin wash on the sunny side, after negative resin is washed, add NaOH in the liquid, make the concentration of HCL or NaOH reach 3-5%, will adjust later washing lotion again and be used as the repeated use of flushing resin column; When the concentration of salt is higher than 2% in the liquid after liquid or negative resin behind the positive resin wash are washed, liquid and negative resin behind the positive resin wash are washed back liquid to be mixed, again through the desalination membrane desalination, obtain strong brine and clear liquid respectively, strong brine is used to evaporate salt manufacturing, clear liquid adds HCL or NaOH, is respectively applied for positive resin of flushing or negative resin.
2. the method that wood sugar according to claim 1 and the cleaner production of Xylitol whole process are prevented and remedied pollution is characterized in that: at digestion process, be with 110-135 ℃ high-temperature water boiling 2 hours; The sulfuric acid concentration that uses in hydrolytic process is 0.5%-0.7%, and concentration of hydrochloric acid is 0.2-0.3%; At filtration step, adopt the three-stage filtration method, one-level is filtered 5-1 micron, cascade filtration 1-0.5 micron, three-stage filtration 0.01-0.001 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100137121A CN101215301A (en) | 2008-01-07 | 2008-01-07 | Full process cleaning production pollution prevention method for xylose and xylitol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100137121A CN101215301A (en) | 2008-01-07 | 2008-01-07 | Full process cleaning production pollution prevention method for xylose and xylitol |
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| Publication Number | Publication Date |
|---|---|
| CN101215301A true CN101215301A (en) | 2008-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100137121A Pending CN101215301A (en) | 2008-01-07 | 2008-01-07 | Full process cleaning production pollution prevention method for xylose and xylitol |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703613A (en) * | 2012-06-26 | 2012-10-03 | 山东福田药业有限公司 | Xylose hydrolysate preparation pre-treatment method for papermaking wastewater |
| CN102839229A (en) * | 2012-09-14 | 2012-12-26 | 武汉工程大学 | Method for increasing reducing sugar yield by coupling of membrane separation and lignocellulose acid hydrolysis |
| CN116041405A (en) * | 2022-12-29 | 2023-05-02 | 陕西科技大学 | Method for separating sucrose-glucose-fructose in plants |
-
2008
- 2008-01-07 CN CNA2008100137121A patent/CN101215301A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703613A (en) * | 2012-06-26 | 2012-10-03 | 山东福田药业有限公司 | Xylose hydrolysate preparation pre-treatment method for papermaking wastewater |
| CN102839229A (en) * | 2012-09-14 | 2012-12-26 | 武汉工程大学 | Method for increasing reducing sugar yield by coupling of membrane separation and lignocellulose acid hydrolysis |
| CN116041405A (en) * | 2022-12-29 | 2023-05-02 | 陕西科技大学 | Method for separating sucrose-glucose-fructose in plants |
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