公开(公告)号：US3857882A

公开(公告)日：1974-12-31

申请号：US38775473

申请日：1973-08-13

Applicant: HOECHST AG

Inventor： AUER E ,  VOGT W ,  GEHRMANN K

IPC: C07C51/00 ,  C07C51/363 ,  C07C51/377 ,  C07C57/54 ,  C07C67/00

CPC classification number: C07C57/54 ,  C07C51/377

Abstract: Production of Alpha -chloroacrylic acid. Acrylic acid and chlorine gas are intimately contacted with one another and the resulting crude reaction product, which predominantly consists of 2,3-dichloropropionic acid, is separated into Alpha chloroacrylic acid and hydrogen chloride. To this end, the reaction produce is introduced into a catalyst zone heated to 80* - 160*C and containing one or more known dehydrochlorination catalysts, wherein Alpha -chloroacrylic acid is continuously distilled off under pressures between 10 and 100 mm of mercury.

Abstract translation: 生产α-氯丙烯酸。 丙烯酸和氯气彼此紧密接触，所得粗制反应产物（主要由2,3-二氯丙酸组成）分离成α-氯丙烯酸和氯化氢。 为此，将反应产物引入加热至80-160℃的催化剂区域中，并含有一种或多种已知的脱氯化氢催化剂，其中在10至100mm汞柱之间的压力下连续蒸馏出α-氯代丙烯酸。