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1.发明授权Process for inhibiting post reactions in the catalytic oxidation of propylene and/or acrolein to produce acrolein and/or acrylic acid 失效在丙烯和/或丙烯酸的催化氧化中抑制后反应以生产丙烯酸和/或丙烯酸的方法
公开(公告)号：US3876693A
公开(公告)日：1975-04-08
申请号：US38638473
申请日：1973-08-07
Applicant: HOECHST AG
Inventor： ERPENBACH HEINZ , GEHRMANN KLAUS , LORK WINFRIED
IPC: B01J8/06 , C07C27/00 , C07C27/14 , C07C45/00 , C07C45/35 , C07C47/22 , C07C51/00 , C07C57/05 , C07C67/00 , C07C51/32 , C07C57/04
CPC classification number: B01J8/067 , B01J2208/00212 , C07C45/35 , C07C47/22
Abstract: Vapour-phase oxidation of propylene and/or acrolein with oxygen in the presence of steam to produce acrolein and/or acrylic acid, wherein post-reactions are inhibited. The oxidation is carried out in a reaction zone on a fixed bed catalyst at temperatures between 320.degree. and 450.degree.C. More particularly, the resulting hot reaction gas mixture leaving the reaction zone is directly introduced into a heat exchanger zone placed directly downstream of the reaction zone, and the reaction gas mixture is cooled in said heat exchanger zone, with water having a temperature at least 25.degree.C above the dew point of the reaction gas mixture, down to temperatures between 200.degree. and 300.degree.C. The reaction zone is bounded by a generally cylindrical casing receiving a plurality of individual tubular structures. The structures are adapted to have a fixed bed catalyst placed therein, bundled together and spaced apart from each other by means of two perforated plates sealing the upper end and lower end, respectively, of the casing, and heated by means of a salt melt. The heat exchanger zone receives a similar number of empty, watercoolable tubular structures. The tubular structures accommodated in the two zones are flanged together, so as to open directly into each other, by means of the perforated plates.
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公开(公告)号：CA2007101C
公开(公告)日：1997-09-23
申请号：CA2007101
申请日：1990-01-04
Applicant: HOECHST AG
Inventor： TETZLAFF HERIBERT , LORK WINFRIED , ERPENBACH HEINZ , GOEDICKE EITEL
IPC: B01J38/00 , B01J31/40 , B01J38/04 , C07B61/00 , C07C27/00 , C07C27/26 , C07C51/12 , C07C51/373 , C07C51/42 , C07C51/54 , C07C51/56 , C07C51/573 , C07C53/08 , C07C53/12 , C07C67/37 , C07C69/16
Abstract: In a process for the purification and recovery of the contaminated solution of catalyst produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether and containing carbonyl complexes of rhodium, organic and/or inorganic promoters, undistillable organic impurities and acetic acid, acetic anhydride and ethylidene diacetate, the organic impurities and acetic acid, acetic anhydride and ethylidene diacetate are removed from the contaminated solution of catalyst by extraction at pressures from 35 to 450 bar and temperatures from 0 to 120.degree.C with a liquefied or supercritical gas, and the phase of the liquefied or supercritical gas is separated from the purified, promoter-containing catalyst solution, the phase of the liquefied or supercritical gas is separated by flash vaporization, the recovered gas is re-employed for extraction, acetic acid, acetic anhydride and ethylidene diacetate are separated off from the component which remains liquid, and are combined with the purified catalyst complex to prepare fresh catalyst solution and, finally, the organic impurities remaining as the residue on separation of the phase of the liquefied or supercritical gas is purged.
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公开(公告)号：AT74538T
公开(公告)日：1992-04-15
申请号：AT90101306
申请日：1990-01-23
Applicant: HOECHST AG
Inventor： ERPENBACH HEINZ DR , LORK WINFRIED , SEIDEL ANDREAS DR , PRINZ PETER
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公开(公告)号：AT41884T
公开(公告)日：1989-04-15
申请号：AT87102883
申请日：1987-02-28
Applicant: HOECHST AG
Inventor： ERPENBACH HEINZ DR , GEHRMANN KLAUS DR , LORK WINFRIED , PRINZ PETER
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公开(公告)号：DE3661597D1
公开(公告)日：1989-02-09
申请号：DE3661597
申请日：1986-04-04
Applicant: HOECHST AG
Inventor： ERPENBACH HEINZ DR , GEHRMANN KLAUS DR , LORK WINFRIED , PRINZ PETER
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Patent Agency Ranking
公开(公告)号：CA1234148A
公开(公告)日：1988-03-15
申请号：CA459999
申请日：1984-07-30
Applicant: HOECHST AG
Inventor： ERPENBACH HEINZ , GEHRMANN KLAUS , LORK WINFRIED , PRINZ PETER
IPC: C07C69/16 , C07C51/00 , C07C51/42 , C07C51/44 , C07C51/487 , C07C51/573 , C07C53/08 , C07C53/12 , C07C67/00 , C07C67/54 , C07C67/60
Abstract: PROCESS FOR SEPARATING IODINE AND ITS COMPOUNDS FROM THE CARBONYLATION PRODUCTS OBTAINED BY SUBJECTING DIMETHYLETHER, METHYL ACETATE OR METHANOL TO A CARBONYLATION REACTION The disclosure relates to a process for separating iodine and its compounds from the carbonylation products acetic acid, acetic anhydride or ethylidene diacetate obtained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reaction. For reducing the quantity of total iodine cantaminating the carbonylation products to less than 20 ppb iodine, the disclosure provides for the carbonylation products to be treated at temperatures of 20 to 250.degree.C with an alkyl or aryl phosphine or a heterocyclic aromatic nitrogen compound and at least one of the metals copper, silver, zinc or cadmium or their compounds and to be distillatively separated from the iodine thereby fixed in non-volatile form.
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公开(公告)号：AU568675B2
公开(公告)日：1988-01-07
申请号：AU3263784
申请日：1984-08-31
Applicant: HOECHST AG
Inventor： ERPENBACH HEINZ , GEHRMANN KLAUS , OHORODNIK ALEXANDER , LORK WINFRIED , JOEST HERBERT
IPC: C07C53/12 , C07C27/00 , C07C27/26 , C07C51/00 , C07C51/42 , C07C51/487 , C07C51/573 , C07C67/00 , C07C57/48
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公开(公告)号：ZA863144B
公开(公告)日：1986-12-30
申请号：ZA863144
申请日：1986-04-28
Applicant: HOECHST AG
Inventor： ERPENBACH HEINZ , GEHRMANN KLAUS , LORK WINFRIED , PRINZ PETER
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