公开(公告)号：US3829483A

公开(公告)日：1974-08-13

申请号：US32575473

申请日：1973-01-22

Applicant: HOECHST AG

Inventor： RAMMELT P ,  SIEGEMUND G

IPC: C07C53/48 ,  B01J27/00 ,  C07B61/00 ,  C07C17/20 ,  C07C51/00 ,  C07C51/58 ,  C07C67/00 ,  C07C53/20

CPC classification number: C07C17/202 ,  C07C51/58 ,  C07C19/10 ,  C07C53/48

Abstract: THE INVENTION RELATES TO A PROCESS FOR THE PREPARATION OF TRIFLUOROACETYL CHLORIDE BY REACTING TRIFLUOROACETYL FLUORIDE AND CHLORINATED HYDROCARBON, CAPABLE OF BEING FLUORINATED, IN THE PRESENCE OF HYDROGEN CHLORIDE AND OPTIONALLY OF HYDROGEN FLUORIDE BY PASSING A GASEOUS MIXTURE OF SAID COMPOUNDS OVER A CHROMIUM OXIDE CATALYST AND ISOLATING THE WANTED TRIFLUOROACTYL CHLORIDE.

公开(公告)号：BR7409400A

公开(公告)日：1976-05-18

申请号：BR940074

申请日：1974-11-08

Applicant: HOECHST AG

Inventor： MARTINI T ,  RAMMELT P ,  LADEMANN R ,  LINDNER H

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 The reaction mixture is thereafter withdrawn proportionally to its feeding-in rate.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.