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公开(公告)号：CA1086873A
公开(公告)日：1980-09-30
申请号：CA293122
申请日：1977-12-15
Applicant: HOECHST AG
Inventor： TOPP ALWIN , SCHMIEDEL KLAUS , SCHAEFFER GEORG
Abstract: PROCESS FOR THE PURIFICATION OF WASTE WATER The waste water being formed upon the preparation of hydroxy aromatics, preferably of resorcinol and .beta.-naphthol, by caustic alkaline melt of the corresponding aryl-sulfonic acids or aryl sulfonates is purified by a wet oxidation with oxygen or oxygen-containing gases at temperatures of from about 100 to 370.degree.C and under a pressure of from about 1 to 300 bar. The CODdecomposition rates amount to about 90% and more. This process provides a sulfate, especially sodium sulfate, which is sufficiently pure for further use without complementary purification stages, if the hydroxy aromatics are prepared by means of a caustic soda melt. The obtention of the pure salt is important for the economy of the process.
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公开(公告)号：AU5281079A
公开(公告)日：1980-05-22
申请号：AU5281079
申请日：1979-11-14
Applicant: HOECHST AG
Inventor： LANDAUER FRANZ , SCHAEFFER GEORG
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公开(公告)号：CA1004691A
公开(公告)日：1977-02-01
申请号：CA174589
申请日：1973-06-21
Applicant: HOECHST AG
Inventor： PIETZSCH SIEGFRIED , SCHAEFFER GEORG
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公开(公告)号：CA864580A
公开(公告)日：1971-02-23
申请号：CA864580D
Applicant: HOECHST AG
Inventor： ARNDT OTTO , SCHAEFFER GEORG , SEMLER GUNTHER
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公开(公告)号：AU539020B2
公开(公告)日：1984-09-06
申请号：AU1183083
申请日：1983-02-24
Applicant: HOECHST AG
Inventor： LANDAUER FRANZ , SCHAEFFER GEORG
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Patent Agency Ranking
公开(公告)号：CA1170271A
公开(公告)日：1984-07-03
申请号：CA368741
申请日：1981-01-16
Applicant: HOECHST AG
Inventor： SPIELMANN WERNER , SCHAEFFER GEORG
IPC: C07C59/52 , C07C51/00 , C07C51/377 , C07C67/00
Abstract: HOE 80/F 007 PROCESS FOR THE MANUFACTURE OF p-HYDROXYPHENYL- ACETIC ACID of the disclosure p-Hydroxyphenylacetic acid is prepared by reduction of p-hydroxymandelic acid with HI in the presence of red phosphorus. According to a preferred embodiment, the reaction is carried out in one vessel in which the mandelic acid is prepared in situ from phenol and glyoxylic acid.
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公开(公告)号：CA1162201A
公开(公告)日：1984-02-14
申请号：CA359076
申请日：1980-08-27
Applicant: HOECHST AG
Inventor： SEMLER GUENTHER , SCHAEFFER GEORG
IPC: C07B61/00 , B01J31/00 , B01J31/02 , C07C67/00 , C07C313/00 , C07C329/00 , C07C329/02 , C07D307/38 , C07D333/10 , C07C154/00
Abstract: HOE 79/F 230 PROCESS FOR THE PREPARATION OF THIOCHLOROFORMATES of the disclosure: Thiochloroformates are prepared by reaction of mercaptans with phosgene in the presence of carboxylic acid amides and/or urea derivatives as catalysts in amounts smaller than hitherto known for this application. The amounts range from about 0.02 to 0.2 mol %, relative to the corresponding starting mercaptan. Despite the small amounts of catalyst the reaction proceeds as with the use of larger catalyst amounts; however, work-up is simplified and the product yields are increased in most cases.
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公开(公告)号：AU1183083A
公开(公告)日：1983-06-09
申请号：AU1183083
申请日：1983-02-24
Applicant: HOECHST AG
Inventor： LANDAUER FRANZ , SCHAEFFER GEORG
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公开(公告)号：AU529156B2
公开(公告)日：1983-05-26
申请号：AU5281079
申请日：1979-11-14
Applicant: HOECHST AG
Inventor： LANDAUER FRANZ , SCHAEFFER GEORG
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公开(公告)号：AU523473B2
公开(公告)日：1982-07-29
申请号：AU5280979
申请日：1979-11-14
Applicant: HOECHST AG
Inventor： LANDAUER FRANZ , SCHAEFFER GEORG
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