公开(公告)号：CA1029746A

公开(公告)日：1978-04-18

申请号：CA212767

申请日：1974-10-31

Applicant: HOECHST AG

Inventor： LADEMANN RUDOLF ,  LINDNER HELMUT ,  MARTINI THOMAS ,  RAMMELT PETER P

IPC: C07C17/00 ,  C07C17/20 ,  C07C22/08 ,  C07C51/62 ,  C07C63/70 ,  C07C67/00 ,  G03F7/038 ,  C07C25/14

Abstract: Preparation of derivatives of benzene containing CF3 groups from the corresponding compounds containing CCl3 groups (e.g. trichloromethyl benzene) is carried out continuously with excellent yield rates by reaction with liquid hydrogen fluoride in an autoclave above 80 DEG C, (which latter exceeds the stoichiometric proportion by at least 25 mole %). The reactants are fed continuously into the autoclave. The reaction mixture preferably becomes pressurized to at least 20 atmospheres and homogeneous after having reached a certain filling level. The reaction mixture is thereafter withdrawn proportionally to its feeding-in rate. The mixture may be conveyed through one or several additional autoclaves with the final withdrawal of the reaction mixture being out from the terminal autoclave of this cascade. The fluorination products are well known starting and inermediate products for the preparation of dyestuffs and pesticidal compositions.

公开(公告)号：CA811714A

公开(公告)日：1969-04-29

申请号：CA811714D

Applicant: HOECHST AG

Inventor： RAMMELT PETER P ,  KORINTH JURGEN ,  SCHERER OTTO

公开(公告)号：CA728679A

公开(公告)日：1966-02-22

申请号：CA728679D

Applicant: HOECHST AG

Inventor： SCHERER OTTO ,  RAMMELT PETER P