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公开(公告)号：BR8503063A
公开(公告)日：1986-03-11
申请号：BR8503063
申请日：1985-06-26
Applicant: HOECHST AG
Inventor： MULLER THOMAS , SIEGEMUND GUNTER
IPC: C07C17/20 , B01J23/02 , B01J23/72 , B01J27/08 , B01J27/138 , B01J27/32 , B01J37/26 , B01J38/46 , C07B61/00 , C07C17/00 , C07C19/08 , C07C67/00
Abstract: According to the specified process chromium oxyfluoride catalysts which have largely lost their activity are regenerated. The catalysts are mixed with magnesium oxide or magnesium hydroxide in the presence of water and converted into a paste. If necessary the mixture must be concentrated by evaporation until it exhibits the consistency of a paste. Finally the paste is dried. The paste is best converted into molded bodies such as, for example, granules before drying.
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公开(公告)号：AU602699B2
公开(公告)日：1990-10-25
申请号：AU7418187
申请日：1987-06-12
Applicant: HOECHST AG
Inventor： HEUMULLER RUDOLF , HERBRECHTSMEIER PETER , SIEGEMUND GUNTER , GROH WERNER
IPC: C07C69/653 , C07C51/347 , C07C51/367 , C07C51/38 , C07C67/00 , C07C67/14 , C07C253/00 , C07C253/30 , C07C255/55 , C08F20/22 , C08F20/50 , C08F30/04 , C08F120/02 , C08F120/22 , C08G16/00 , C07C121/75
Abstract: Certain esters of alpha -fluoroacrylic acid are available via hydrolysis of alpha -hydroxymethyl- alpha -fluoromalonic esters, followed by decarboxylation of the hydrolysis product. Phenyl alpha -fluoroacrylates which are substituted on the phenyl radical can be prepared by hydroxymethylation of dimethyl alpha -fluoromalonates, decarboxylation and dehydration of the resultant dimethyl alpha -hydroxymethyl- alpha -fluoromalonate and esterification of the resultant alpha -fluoroacrylic acid with substituted phenols. The substituted phenyl alpha -fluoroacrylates are colourless liquids or colourless solids which are polymerisable. They are suitable as starting material for the preparation of fluorinated polymers.
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公开(公告)号：CA2007684A1
公开(公告)日：1990-07-14
申请号：CA2007684
申请日：1990-01-12
Applicant: HOECHST AG
Inventor： SIEGEMUND GUNTER , FINKE MANFRED
Abstract: HOE 89/F 009 A process for the dimerization of hexafluoropropene oxide A process for the preparation of the dimer of hexafluoropropene oxide (HFPO), in which the HFPO is dimerized in an aprotic polar solvent in the presence of a catalyst mixture, is described. The catalyst mixture is composed of a metal salt of the elements of the 1st transition metal series of the periodic table and of a tertiary diamine. By bringing in a molar ratio of metal salt to tertiary diamine in the range from 2:1 to 1:2, in particular 1:1, the selectivity for the dimeric compound is greatest, with high yields of the dimer being obtained.
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Patent Agency Ranking
公开(公告)号：AU586314B2
公开(公告)日：1989-07-06
申请号：AU6814487
申请日：1987-01-30
Applicant: HOECHST AG
Inventor： MULLER THOMAS , SIEGEMUND GUNTER
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公开(公告)号：AU7418187A
公开(公告)日：1987-12-17
申请号：AU7418187
申请日：1987-06-12
Applicant: HOECHST AG
Inventor： HEUMULLER RUDOLF , HERBRECHTSMEIER PETER , SIEGEMUND GUNTER , GROH WERNER
IPC: C07C69/653 , C07C51/347 , C07C51/367 , C07C51/38 , C07C67/00 , C07C67/14 , C07C253/00 , C07C253/30 , C07C255/55 , C08F20/22 , C08F20/50 , C08F30/04 , C08F120/02 , C08F120/22 , C08G16/00 , C07C121/75
Abstract: Certain esters of alpha -fluoroacrylic acid are available via hydrolysis of alpha -hydroxymethyl- alpha -fluoromalonic esters, followed by decarboxylation of the hydrolysis product. Phenyl alpha -fluoroacrylates which are substituted on the phenyl radical can be prepared by hydroxymethylation of dimethyl alpha -fluoromalonates, decarboxylation and dehydration of the resultant dimethyl alpha -hydroxymethyl- alpha -fluoromalonate and esterification of the resultant alpha -fluoroacrylic acid with substituted phenols. The substituted phenyl alpha -fluoroacrylates are colourless liquids or colourless solids which are polymerisable. They are suitable as starting material for the preparation of fluorinated polymers.
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公开(公告)号：AU567274B2
公开(公告)日：1987-11-12
申请号：AU4420485
申请日：1985-06-26
Applicant: HOECHST AG
Inventor： MULLER THOMAS , SIEGEMUND GUNTER
IPC: C07C17/20 , B01J23/02 , B01J23/72 , B01J27/08 , B01J27/138 , B01J27/32 , B01J37/26 , B01J38/46 , C07B61/00 , C07C17/00 , C07C19/08 , C07C67/00
Abstract: According to the specified process chromium oxyfluoride catalysts which have largely lost their activity are regenerated. The catalysts are mixed with magnesium oxide or magnesium hydroxide in the presence of water and converted into a paste. If necessary the mixture must be concentrated by evaporation until it exhibits the consistency of a paste. Finally the paste is dried. The paste is best converted into molded bodies such as, for example, granules before drying.
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公开(公告)号：AU567173B2
公开(公告)日：1987-11-12
申请号：AU3000684
申请日：1984-06-28
Applicant: HOECHST AG
Inventor： MULLER THOMAS , SIEGEMUND GUNTER
IPC: B01J23/26 , B01J27/12 , B01J27/138 , B01J29/26 , B01J37/26 , C07B61/00 , C07C17/00 , C07C17/20 , C07C17/37 , C07C67/00 , B01J21/10
Abstract: A process is specified for preparing a chromium- and magnesium-containing catalyst for fluorination reactions by precipitating chromium(III) hydroxide. In this process, 1 mole of a water-soluble chromium(III) salt is reacted with at least 1.5 moles of magnesium hydroxide or magnesium oxide in the presence of water, and the reaction mixture-if necessary by evaporation-is converted into a paste which contains chromium(III) hydroxide and a magnesium salt. The paste is dried and treated with hydrogen fluoride at temperatures of 20 DEG to 500 DEG C.
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公开(公告)号：CA1049048A
公开(公告)日：1979-02-20
申请号：CA206865
申请日：1974-08-09
Applicant: HOECHST AG
Inventor： KUHN HEINRICH , KLUGE FRIEDHELM , SIEGEMUND GUNTER
Abstract: PROCESS FOR THE PREPARATION OF 1-CHLORO-2,2,2-TRIFLUORO- ETHYLDIFLUOROMETHYL ETHER of the disclosure: Process for the preparation of 1-chloro-2,2,2-trifluoro-ethyl-difluoromethyl ether by reacting 1-chloro-2,2,2-tri-fluoroethyl-methyl ether with elementary chlorine and fluorinating the resulting 1-chloro-2,2,2-trifluoroethyl-dichloro-methyl ether.
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