公开(公告)号：US3754029A

公开(公告)日：1973-08-21

申请号：US3754029D

申请日：1971-09-13

Applicant: HOECHST AG

Inventor： HOLTERMANN R ,  WIRTZ R ,  FREYER W ,  GSCHEIDMEIER M

IPC: C07C51/377 ,  C07C51/487 ,  C07C51/42

CPC classification number: C07C51/377 ,  C07C51/487 ,  C07C53/16

Abstract: DI- AND TRICHLOROACETIC ACID CONTAINED AS IMPURITTIES IN CRUDE MONOCHLOROACETIC ACID ARE PARRTIALLY DEHALOGENATEDD AND TRANSFORMED IN MONOCHLOROACETIC ACID AT A TEMPERATURE OF FROM 110 TO 145*C. IN A CONTINUOUS PROCESS IN THE PPRESENCE OF HYDROGEN WHILE TRICKLING THROUGH A CATALYST LAYER THE ACTIVE CONSTITUENT OF WHICH IS A NOBLE METAL OF SUBGROUP VIII OF THE PERIODIC TABLE.

公开(公告)号：SE367392B

公开(公告)日：1974-05-27

申请号：SE1533569

申请日：1969-11-07

Applicant: HOECHST AG

Inventor： GSCHEIDMEIER M ,  FREYER W

IPC: B01D15/04 ,  B01J39/04 ,  B01J39/05 ,  C07C51/47 ,  C07C51/42