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公开(公告)号：CA2339614A1
公开(公告)日：2001-09-09
申请号：CA2339614
申请日：2001-03-06
Applicant: DEGUSSA
Inventor： MAASSEN RALF , HUTHMACHER KLAUS , KRILL STEFFEN
Abstract: A process for the preparation of 2,3,5-trimethyl-p- benzoquinone by oxidation of 2,3,5- or 2,3,6- trimethylphenol using oxygen or a gas mixture containing oxygen in the presence of a two-phase liquid reaction medium composed of water and a neocarboxylic acid having 8 to 11 carbon atoms with a copper (II) halide-containing catalyst system at elevated temperature.
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公开(公告)号：ID27701A
公开(公告)日：2001-04-26
申请号：ID20000698
申请日：2000-08-22
Applicant: DEGUSSA
Inventor： WEIGEL HORST , KRILL STEFFEN , HASSELBACH HANS JOACHIM , HUTHMACHER KLAUS
IPC: C07C67/00 , C07D311/72
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公开(公告)号：DE19951006A1
公开(公告)日：2001-04-26
申请号：DE19951006
申请日：1999-10-22
Applicant: DEGUSSA
Inventor： WEIGEL HORST , KRILL STEFFEN , HASSELBACH HANS JOACHIM , HUTHMACHER KLAUS
IPC: C07C67/00 , C07D311/72
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公开(公告)号：BR9904055A
公开(公告)日：2000-09-19
申请号：BR9904055
申请日：1999-08-31
Applicant: DEGUSSA
Inventor： HEINZ DIETER , HOELDERICH WOLFGANG , KRILL STEFFEN , BOECK WOLFGANG , HUTHMACHER KLAUS
IPC: C07D213/79 , C07D213/80 , C07D213/803 , C07D213/807
Abstract: In the direct oxidation of beta -picoline to nicotinic acid, product yield is increased by the separate addition of the beta -picoline and water to the catalyst bed filled with a catalyst comprising a TiO2 carrier which contains vanadium.
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公开(公告)号：ID21942A
公开(公告)日：1999-08-12
申请号：ID990105
申请日：1999-02-11
Applicant: DEGUSSA
Inventor： KRILL STEFFEN , WELGEL HORST , SHI NONGYUAN , HASSELBACH HANS JOACHIM , HUTHMASHER KLAUS , HUBNER FRANK
IPC: B01J21/02 , B01J27/02 , B01J27/06 , B01J31/02 , C07B61/00 , C07C37/01 , C07C37/06 , C07C39/08 , C07C67/00 , C07C69/017 , C07C69/16
Abstract: An improved process for the production of 2,3,5-trimethylhydroquinone by rearrangement of 4-oxoisophorone (ketoisophorone, 3,5,5-trimethyl-2-cyclohexen-1,4-dione) to yield a trimethylhydroquinone diester and the subsequent saponification thereof. Trimethylhydroquinone is in turn an important starting material for the production of vitamin E.
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Patent Agency Ranking
公开(公告)号：ID21588A
公开(公告)日：1999-06-24
申请号：ID981642
申请日：1998-12-17
Applicant: DEGUSSA
Inventor： KRILL STEFFEN , HUBNER FRANK , HAHN RAINER , WEIGEL HORST , HUTHMACHER KLAUS
IPC: C07B61/00 , C07D311/72
Abstract: Preparation of alpha -tocopherol ester compounds (I) involves reacting a hydroquinone ester (II) with an allyl alcohol derivative (III) in presence of a zinc halide and an acid. Preparation of alpha -tocopherol esters (or derivatives or homologues) of formula (I) involves reacting a hydroquinone mono- (sic) or diester of formula (II) with an allyl alcohol derivative of formula (III) in presence of a zinc halide and a protonic acid at 25-100 degrees C. R1, R2 = optionally unsaturated 1-20C alkyl; R3-R5 = H or 1-3C alkyl; n = 0-5; Q = -C(Me)=CH-CH2L or -C(Me)(L')-CH=CH2; L = OH, halo, acetoxy, MeSO2O, EtSO2O, PhSO2O or toluenesulfonyl; L' = OH, halo or acetoxy.
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公开(公告)号：SG11201508343SA
公开(公告)日：2015-11-27
申请号：SG11201508343S
申请日：2014-05-21
Applicant: EVONIK DEGUSSA GMBH
Inventor： GLÖCKLER BERND , STEFFAN MARTIN , STEURENTHALER MARTIN , MÜLLER THOMAS , RIGOT NICOLAS , KRILL STEFFEN , KÖRFER MARTIN
Abstract: The reaction tube comprises a cylindrical ceramic tube and a catalyst comprising platinum applied to the inner surface of the tube, wherein the reaction tube has fins on the inner surface which run in the longitudinal direction of the tube, extend into the interior space of the reaction tube and are coated with catalyst. The reaction tube is suitable for preparing hydrogen cyanide by reacting ammonia and at least one aliphatic hydrocarbon having 1 to 4 carbon atoms at a temperature of 1000 to 1400° C.
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公开(公告)号：DK1268390T3
公开(公告)日：2004-05-10
申请号：DK01921349
申请日：2001-03-24
Applicant: DEGUSSA
Inventor： KRILL STEFFEN , HUTHMACHER KLAUS
IPC: C07B61/00 , C07C37/06 , C07C37/07 , C07C39/08 , C07C37/055 , C07C67/00 , C07C67/08 , C07C69/157 , C07C69/16
Abstract: A process for preparing trimethylhydroquinone diacetate, with subsequent hydrolysis to give trimethylhydroquinone, the process including reacting 2,2,6-trimethylcyclohexane-1,4-dione under oxidative conditions, in the presence of a sulfonating agent and a strong acid, and in the presence of an acylating agent.
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公开(公告)号：AT259772T
公开(公告)日：2004-03-15
申请号：AT01921349
申请日：2001-03-24
Applicant: DEGUSSA
Inventor： KRILL STEFFEN , HUTHMACHER KLAUS
IPC: C07C37/055 , C07B61/00 , C07C37/06 , C07C37/07 , C07C39/08 , C07C67/00 , C07C67/08 , C07C69/157 , C07C69/16
Abstract: A process for preparing trimethylhydroquinone diacetate, with subsequent hydrolysis to give trimethylhydroquinone, the process including reacting 2,2,6-trimethylcyclohexane-1,4-dione under oxidative conditions, in the presence of a sulfonating agent and a strong acid, and in the presence of an acylating agent.
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公开(公告)号：YU61900A
公开(公告)日：2003-04-30
申请号：YUP61900
申请日：2000-10-10
Applicant: DEGUSSA HULS AKTIENGESSELLSCHAFT
Inventor： MAASSEN RALF , KRILL STEFFEN , JAGER BARBARA , HUTHMACHER KLAUS
Abstract: Postupak za proizvodnju 2,3,5-trimetil-p-benzohinona oksidacijom 2,3,5-trimetilfenola ili 2,3,6-trimetilfenola kiseonika ili jednom gasnom smešom sa sadržajem kiseonika u prisustvu jednog katalizatorskog sistema, koji se sastoji od halogenida bakra i jednog halogenida prelaznih metala iz grupe gvoždje, hrom, mangan, kobalt, nikl, cink ili jednog halogenida retkih zemalja u jednoj dvofaznoj reakcionoj sredini na povišenoj temperaturi.[Process of production of 2,3,5 trimethyl-p-benzoquinone by oxidation of 2,3,5 -trimethyl phenole or 2,3,6- trimethylphenole of oxygen in the presence of one catayst system which consists of copper halogenide and one halogenide of transfer metals from the group iron, chrome, mangane, cobalt, nickel, zinc and one halogenide of rre countries in one two phase reaction environemint of the increased temperature.
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