YU43899A - Postupak karbonilovanja - Google Patents

Abstract

Postupak uklanjanja viših organskih jodida, naročito heksil-jodida, iz sirćetne kiseline proizvedene karbonilovanjem metanola i/ili njegovog reaktivnog derivata u prisustvu konačne koncentracije vode, plemenitog metala VIII Grupe kao katalizatora, metil-jodida kao ko-katalizatora i opciono promotera katalizatora, a taj postupak sadrži fazu dovodjenja vodene smeše koja se sastoji od sirćetne kiseline i najmanje jednog višeg organskog jodida u destilacionu kolonu, ili deo destilacione kolone i odvajanja vode sa vrha kolone od frakcije suve sirćetne kiseline, tako da je koncentracija vode na ulaznom podu kolone, ili delu kolone, veća od 8 mas.%, a koncentracija vode na vrhu kolone i/ili delu kolone, veća od 70 mas.%.[The process of removal of higher organic iodides, in particular hexil-iodide, from acetic acid produced by carbonylation of methanol and/or its reactive derivate in the presence of final concentration of water, precious metals of Group VIII as a catalyst, methil iodide as co-catalyst and that procedure contains a phase of bringing water mixture containing acetic acid and at least one higher organic iodide into destilation column and the removal of water from the top of the column from the fraction of dried acetic acid, so that the concentration of water at the entrance floor of the column, on part of column, is bigger for 8 mass%, and the concentration of water at the top of the column and/or part of the column is bigger than 70% of mass.