Recovery of acetic acid from dilute aqueous streams formed during a carbonylation process.
摘要
A method is provided to improve the quality of recycle of certain residues by modifying the separation of alkanes and alkane-like materials and carbonyl-containing impurities from the recycle during the manufacture of acetic acid by the carbonylation of methanol. The improvement comprises partitioning the residues by the addition of water obtained from aqueous streams containing up to 50 wt. % acetic acid and which have been treated in a catalytic distillation unit to react the acetic acid with methanol to form recyclable methyl acetate and water and wherein the water is separated from the organics by distillation.
申请公布号
PH31642(A)
申请公布日期
1999.01.12
申请号
PH19600000027
申请日期
1996.03.29
申请人
HOECHST CELANISE CORPORATION
发明人
SCATES, MARK, O.;PARKER, STEVEN, E.;LACY, JENNIFER, B.;GIBBS, RUSSEL, K.