公开(公告)号：US3531471A

公开(公告)日：1970-09-29

申请号：US3531471D

申请日：1966-03-10

Applicant: HOECHST AG

Inventor： HARTWIMMER ROBERT ,  SCHWIERSCH WOLFRAM

IPC: C07C233/00 ,  C07D207/26 ,  C07D227/08 ,  C07D41/06

CPC classification number: C07D207/26 ,  C07C233/00 ,  C07D227/08

公开(公告)号：CA767704A

公开(公告)日：1967-09-19

申请号：CA767704D

Applicant: HOECHST AG

Inventor： SCHWIERSCH WOLFRAM ,  HARTWIMMER ROBERT

公开(公告)号：CA1067101A

公开(公告)日：1979-11-27

申请号：CA256028

申请日：1976-06-30

Applicant: HOECHST AG

Inventor： LADEMANN RUDOLF ,  LANDAUER FRANZ ,  LENZMANN HEINRICH ,  SCHMIEDEL KLAUS ,  SCHWIERSCH WOLFRAM

IPC: B01J19/12 ,  C07C17/00 ,  C07C17/14 ,  C07C22/04 ,  C07C22/06 ,  C07C25/02 ,  C07C67/00 ,  C07C25/14

Abstract: Continuous preparation of mono- or di-(trichloromethy)-benzenes or of mono- or di-(trichloromethyl)-benzenes substituted in the benzene ring by halogen a?oms from the corresponding mono- or dimethylbenzenes and chlorine in several steps with radiation by means of rays of high energy, by reacting mono- or dimethylbenzene with chlorine in 4 to 14 steps, at a temperature in the range of from 20 to 130.degree.C, whereby chlorine is introduced into the second step and the following steps, the resulting waste gas is introduced into step 1 and chlorine contained in the waste gas is reacted in reactor 1 with fresh mono- and dimethylbenzene. A preferred embodiment for carrying out the process is the reaction in a reactor arrangement in cascade form, wherein the number of steps corresponds to the number of reactors and wherein as reactors circulation reactors are used. The mono- and di-(trichloromethyl)-benzenes are valuable intermediates for the preparation of pesticides, textile auxiliaries and dyestuffs.