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公开(公告)号：SE435139B
公开(公告)日：1984-09-10
申请号：SE7709149
申请日：1977-08-12
Applicant: HOECHST AG
Inventor： REBSDAT S , MAYER S , ALFRANSEDER J , RIEDL J
IPC: B01J23/66 , B01J23/96 , B01J38/48 , B01J38/50 , C07B61/00 , C07D301/10 , C07D303/04
Abstract: The activity of supported silver catalysts used up in the direct oxidation of ethylene with molecular oxygen or air is improved by impregnating the catalyst arranged in a fixed bed with a solution of a caesium and/or rubidium compound in an inert organic solvent, optionally together with up to 40% by weight of water, calculated on the total liquid, as dissolving intermediary, so as to produce a concentration gradient of from 0.3 to 20 parts of caesium and/or rubidium per 1 million parts of catalyst and per meter of fixed bed, counter to the direction of flow of the gas to be reacted. In this manner the activity of the catalyst is considerably improved which results in an increased selectivity of the oxidation of ethylene to ethylene oxide.
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公开(公告)号：AU510768B2
公开(公告)日：1980-07-10
申请号：AU3014077
申请日：1977-10-28
Applicant: HOECHST AG
Inventor： REBSDAT S , MAYER S , ALFRANSEDER J , RIEDL J
IPC: B01J23/66 , B01J23/96 , B01J31/40 , B01J38/48 , C07B61/00 , C07D301/10 , C07D303/04 , B01J23/50
Abstract: The activity of supported silver catalysts for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air is improved by applying to the catalyst from 1 to 1,000 ppm, preferably 20 to 500 ppm, of cesium and/or rubidium in two or more than two steps and using the catalyst after each impregnation step again for the production of ethylene oxide by direct oxidation of ethylene with molecular oxygen or air.
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公开(公告)号：YU143380A
公开(公告)日：1982-10-31
申请号：YU143380
申请日：1980-05-28
Applicant: HOECHST AG
IPC: B01J23/00 , B01J23/72 , B01J23/74 , B01J27/10 , B01J27/122 , B01J27/128 , C07B61/00 , C07C17/00 , C07C17/02 , C07C17/156 , C07C19/045 , C07C67/00 , C07C17/15 , C07C19/02
Abstract: A process for the manufacture of 1,2-dichloroethane from ethylene by reaction with hydrogen chloride and inert gases containing oxygen, and also by reaction with chlorine, is described. The two chlorination reactions are carried out successively at 180 DEG to 360 DEG C. and under a pressure of 0.09 to 1.1 MPa in a common reaction space containing fluidized catalyst particles. A stoichiometric excess of ethylene is employed for the first chlorination reaction. The heat formed in the reaction space is removed by indirect cooling. The process is simple in terms of apparatus and permits a better re-use of the total heat of reaction of the chlorination of ethylene.
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公开(公告)号：SE7503891L
公开(公告)日：1975-10-07
申请号：SE7503891
申请日：1975-04-04
Applicant: HOECHST AG
Inventor： RIEDL J , FROHLICH W , MITTERMAIER E
Abstract: Vinyl chloride is produced by pyrolytic decomposition of 1,2-dichloroethane in a furnace with coiled up reaction tube having an internal diameter of from 12 to 16 cm. The dichloroethane is vaporized completely in the convection zone of the pyrolytic furnace, different amounts of heat are supplied to the different zones of the reaction tube and, after decomposition in the working up of the reaction products, the low-boiling constitutents are treated with chlorine and separated together with the high-boiling constituents.
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公开(公告)号：NO751170L
公开(公告)日：1975-10-07
申请号：NO751170
申请日：1975-04-04
Applicant: HOECHST AG
Inventor： RIEDL J , FROEHLICH W , MITTERMAIER E
Abstract: Vinyl chloride is produced by pyrolytic decomposition of 1,2-dichloroethane in a furnace with coiled up reaction tube having an internal diameter of from 12 to 16 cm. The dichloroethane is vaporized completely in the convection zone of the pyrolytic furnace, different amounts of heat are supplied to the different zones of the reaction tube and, after decomposition in the working up of the reaction products, the low-boiling constitutents are treated with chlorine and separated together with the high-boiling constituents.
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Patent Agency Ranking
公开(公告)号：DK142982C
公开(公告)日：1981-10-12
申请号：DK105172
申请日：1972-03-07
Applicant: HOECHST AG
Inventor： JACOBOWSKY A , RECHMEIER G , RIEDL J , FROEHLICH W , MITTERMAIER E
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公开(公告)号：ZA803244B
公开(公告)日：1981-06-24
申请号：ZA803244
申请日：1980-05-30
Applicant: HOECHST AG
IPC: B01J23/00 , B01J23/72 , B01J23/74 , B01J27/10 , B01J27/122 , B01J27/128 , C07B61/00 , C07C17/00 , C07C17/02 , C07C17/156 , C07C19/045 , C07C67/00 , C07C
Abstract: A process for the manufacture of 1,2-dichloroethane from ethylene by reaction with hydrogen chloride and inert gases containing oxygen, and also by reaction with chlorine, is described. The two chlorination reactions are carried out successively at 180 DEG to 360 DEG C. and under a pressure of 0.09 to 1.1 MPa in a common reaction space containing fluidized catalyst particles. A stoichiometric excess of ethylene is employed for the first chlorination reaction. The heat formed in the reaction space is removed by indirect cooling. The process is simple in terms of apparatus and permits a better re-use of the total heat of reaction of the chlorination of ethylene.
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公开(公告)号：SE418079B
公开(公告)日：1981-05-04
申请号：SE7503891
申请日：1975-04-04
Applicant: HOECHST AG
Inventor： RIEDL J , FROHLICH W , MITTERMAIER E
Abstract: Vinyl chloride is produced by pyrolytic decomposition of 1,2-dichloroethane in a furnace with coiled up reaction tube having an internal diameter of from 12 to 16 cm. The dichloroethane is vaporized completely in the convection zone of the pyrolytic furnace, different amounts of heat are supplied to the different zones of the reaction tube and, after decomposition in the working up of the reaction products, the low-boiling constitutents are treated with chlorine and separated together with the high-boiling constituents.
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公开(公告)号：ZA7501911B
公开(公告)日：1976-03-31
申请号：ZA7501911
申请日：1975-03-26
Applicant: HOECHST AG
Inventor： RIEDL J , FROEHLICH W , MITTERMAIER E
CPC classification number: C07C17/25 , B01J12/005 , B01J19/242 , B01J2219/00006 , B01J2219/00157 , B01J2219/00159 , B01J2219/00186 , C07C17/395 , C07C21/06
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公开(公告)号：DK145975A
公开(公告)日：1975-10-07
申请号：DK145975
申请日：1975-04-04
Applicant: HOECHST AG
Inventor： RIEDL J , FROHLICH W , MITTERMAIER E
Abstract: Vinyl chloride is produced by pyrolytic decomposition of 1,2-dichloroethane in a furnace with coiled up reaction tube having an internal diameter of from 12 to 16 cm. The dichloroethane is vaporized completely in the convection zone of the pyrolytic furnace, different amounts of heat are supplied to the different zones of the reaction tube and, after decomposition in the working up of the reaction products, the low-boiling constitutents are treated with chlorine and separated together with the high-boiling constituents.
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