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。

公开(公告)号：US3856755A

公开(公告)日：1974-12-24

申请号：US31665972

申请日：1972-12-20

Applicant: HOECHST AG

Inventor： VOGT W ,  FISCHER E ,  AUER E

IPC: C08F8/00 ,  B01J45/00 ,  C08F8/12 ,  C08F8/14 ,  C08F8/16 ,  C08F14/00 ,  C08F27/02 ,  C08F27/14

CPC classification number: C08F8/16 ,  C08F220/04 ,  C08F222/06 ,  C08F8/44 ,  C08F8/12 ,  C08F222/04 ,  C08F220/06 ,  C08F222/10

Abstract: in which X, Y and Z stand for a hydrogen and/or halogen atom with the proviso that at least one of the X, Y and Z substituents stands for a halogen atom, R stands for a carboxyhalide radical, a carboxylic group, ester group, nitrile group or anhydride group, and the mole fraction m stands for a number greater than zero and smaller than 1.

The invention provides novel oligomers and/or polymers containing carboxylic and hydroxylic groups - the latter groups being partially lactonized, if desired - and a predominant proportion of C-C bonds in their principal chain. The oligomers and/or polymers are produced by hydrolyzing halogenated copolymers which have substantially between 5 and 60 weight % of halogen therein and a principal chain based on structural units, in any desirable sequential arrangement, of the following general formulae I and II or I and III

Abstract translation: 本发明提供了含有羧基和羟基基团的新型低聚物和/或聚合物 - 如果需要，后者基团部分地被内酯化，并且在它们的主链中占主要比例的C-C键。 低聚物和/或聚合物通过水解基本上为5至60重量％的卤素的卤代共聚物和基于结构单元的主链，以任何所需的顺序排列，通式I和II或I和 III其中X，Y和Z代表氢和/或卤素原子，条件是X，Y和Z取代基中的至少一个代表卤素原子，R代表羧基，羧基，酯 基团，腈基或酸酐基，摩尔分数m表示大于零且小于1的数。