公开(公告)号：CA1197226A

公开(公告)日：1985-11-26

申请号：CA430124

申请日：1983-06-10

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/54 ,  B01J23/66 ,  C07D301/10 ,  B01J23/04 ,  B01J23/50

Abstract: of the disclosure: The new silver catalysts contain 3 to 20% by weight of silver and 0.003 to 0.05% by weight of potassium, rubidium, cesium or a mixture thereof as promoter on a heat-resistant porous support material, all the weight percentages being relative to the weight of the catalyst. They are prepared by applying to the support material the silver in the form of a silver salt/amine complex containing a specific amine, and reducing the complex to metallic silver, the amine being a mixture of tert.-alkylamine and sec.-alkylamine.

公开(公告)号：HUT34371A

公开(公告)日：1985-03-28

申请号：HU145783

申请日：1983-04-28

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/54 ,  B01J23/66 ,  C07D301/10 ,  B01J23/50

公开(公告)号：CA1157051A

公开(公告)日：1983-11-15

申请号：CA368742

申请日：1981-01-16

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  SCHAFFELHOFER IWO

IPC: C07C27/00 ,  C07C29/10 ,  C07C29/132 ,  C07C29/80 ,  C07C29/88 ,  C07C31/20 ,  C07C67/00

Abstract: of the disclosure: Ethylene oxide and water are reacted in a reactor and the reaction product is subjected to distillation in a plurality of distillation columns, in the first columns water and components having a boiling point below that of monoethylene glycol and higher ethylene glycols, if any, being distilled off. To obtain extremely pure monoethylene glycol alkali metal compounds are added at a point between the reactor and the monoethylene glycol distillation column in an amount to adjust the pH of the product entering the latter column to a value of from 7 to 10. The monoethylene glycol obtained in this manner is especially pure and has very low UV absorption values. It is, therefore, especially suitable for the manufacture of polyester fibers.

公开(公告)号：RO73097A

公开(公告)日：1982-05-10

申请号：RO9135177

申请日：1977-08-12

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  RIEDL JOSEF

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.

公开(公告)号：CA1103651A

公开(公告)日：1981-06-23

申请号：CA284612

申请日：1977-08-12

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  RIEDL JOSEF

IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/50 ,  C07B61/00 ,  C07D301/10 ,  B01J23/50

Abstract: HOE 76/F 913 PROCESS FOR IMPROVING THE ACTIVITY OF USED SUPPORTED SILVER CATALYSTS of the disclosure: 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 gass 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.

公开(公告)号：AU3964178A

公开(公告)日：1980-03-13

申请号：AU3964178

申请日：1978-09-07

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIEGMUND ,  ALFRANSEDER JOSEF ,  RIEDL JOSEF

IPC: B01J23/96 ,  B01J38/48 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04 ,  B01J23/66

Abstract: The activity of supported silver catalysts, which have been used for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air and to which from 1 to 1,000 parts, per 1 million parts of catalyst, of cesium and/or rubidium have been applied, is improved by washing the catalyst with an inert liquid prior to the application of cesium and/or rubidium.

公开(公告)号：CA1011751A

公开(公告)日：1977-06-07

申请号：CA178599

申请日：1973-08-10

Applicant: HOECHST AG

Inventor： BENNINGER SIEGFRIED ,  REBSDAT SIEGFRIED

公开(公告)号：CA1006543A

公开(公告)日：1977-03-08

申请号：CA178558

申请日：1973-08-10

Applicant: HOECHST AG

Inventor： BENNINGER SIEGFRIED ,  REBSDAT SIEGFRIED ,  KOHLHAAS RUDOLF

IPC: A61K9/08 ,  C07B61/00 ,  C07C217/26 ,  C23C2/02 ,  C25B3/28 ,  G21C15/28 ,  H01B3/24

Abstract: Tetrafluoro-ethylene can be added to monoamines having oxyethyl or oxypropyl groups in aprotic polar solvents in the presence of alkali metals. The new monoamines obtained having the radicals tetrafluoro-ethyloxy-ethyl or tetrafluoro-ethyl-oxy-propyl are electrolyzed in anhydrous hydrofluoric acid, thus forming new monoamines in which all or nearly all hydrogen atoms of the starting compounds are replaced by fluorine.

公开(公告)号：CA862201A

公开(公告)日：1971-01-26

申请号：CA862201D

Applicant: HOECHST AG

Inventor： RUCHLAK KASIMIR ,  REBSDAT SIEGFRIED ,  HAHN HELMUT ,  SCHUIERER ERICH

公开(公告)号：DE1915609A1

公开(公告)日：1970-10-08

申请号：DE1915609

申请日：1969-03-27

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  ERICH SCHUIERER DR ,  HELMUT HAHN DR

IPC: C07C43/13

Abstract: Alcohols which contain I and F. Cpds. of formula: RfCH2-CHI-CH2-O-(CnH2nO)mH (where Rf is 2-10C polyfluoro-alkyl, e.g. C6F13 or C8F17; n = 2 or 3;m = 1 or 2. They are prepared by reacting RfI with an alkoxylate of allyalcohol CH2=CHCG2O(CnH2nO)mH at 40 degrees C-80 degrees C in the absence of O2. They can be used as solvents, lube additives or fire proofing agents.