SEPARATION OF ACRYLIC ACID FROM THE REACTION GASES FROM PROPYLENE OR ACROLEIN OXIDATION,申请号GB19730039916-传众专利搜索

SEPARATION OF ACRYLIC ACID FROM THE REACTION GASES FROM PROPYLENE OR ACROLEIN OXIDATION

申请公布号：GB1432190(A)

申请号：GB19730039916

申请日期：1973.08.23

申请公布日期：1976.04.14

申请人：

BASF AG

分类号：B01D53/14;B01D53/72;B01D53/77;C07C51/00;C07C51/25;C07C51/48;C07C57/07;C07C67/00;(IPC1-7):C07C57/04

主分类号：B01D53/14

摘要：1432190 Acrylic acid BASFAG 23 Aug 1973 [24 Aug 1972] 39916/73 Heading C2C Acrylic acid is separated from the reaction gas obtained by the oxidation of propylene or acrolein by countercurrent absorption with a carboxylic ester (M.P. less than 30‹ C. and B.P. at normal pressure above 160‹ C.), at 50‹ to 80‹ C. with at least 8 parts by weight of carboxylic ester per part by weight of acrylic acid in the reaction gas, and in which the dissolved acetic acid and water are expelled from the absorption solution at 90‹ to 140‹ C. and 0À5 to 5 bars by an inert gas which is passed to countercurrent absorption to recover acrylic acid, and the acrylic acid is distilled from the ester solution under reduced pressure. Suitable absorbent esters are methyl, ethyl, n-butyl, isooctyl-2-ethylhexyl and/or octyl esters of oleic, adipic and/or phthalic acids, and the absorber may be a packed or plate column. Examples describe an apparatus using o-diethyl phthalate as absorber with nitrogen as the inert gas.