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公开(公告)号：DE10222850A1
公开(公告)日：2002-12-05
申请号：DE10222850
申请日：2002-05-23
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO , OKUMURA KOICHI , UENOYA MASAYA , FUJITANI KANGO , KIHARA YOSHIHIRO
IPC: C07C29/141 , C07C29/80 , C07C33/05
Abstract: An alicyclic unsaturated alcohol (for example, tetrahydrobenzyl alcohol) having the purity of 99% by weight or more, the water content of 0.1% by weight or less and the acid value of 0.1 mg KOH/g or less can be produced, with high selectivity, by hydrogenating using an unsaturated cyclic aldehyde having the acid value of 10 mg KOH/g or less as a raw material; terminating the hydrogenation in the conversion of 70 to 99.8%; and rectifying the reaction product containing the unreacted unsaturated cyclic aldehyde. The high purity alicyclic unsaturated alcohol is useful as raw material chemicals for synthesizing drugs, agricultural chemicals, perfumes, and dyes etc.
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公开(公告)号：DE69414361T3
公开(公告)日：2006-06-29
申请号：DE69414361
申请日：1994-08-16
Applicant: DAICEL CHEM
Inventor： MORIMOTO YOSHIAKI , TANIGAWA HIROTO , AKITA KAZUYUKI
Abstract: A process for producing acetic anhydride alone or both of acetic anhydride and acetic acid by the reaction of methyl acetate and/or dimethyl ether and, as optional component(s), water and/or methanol with carbon monoxide alone or both of carbon monoxide and hydrogen in the presence of a rhodium compound and methyl iodide as the principal catalysts, wherein trace impurities causative of tar generation is removed by separating the same through distillation in the evaporator and/or in the subsequent refining step, thus reducing the generation of the tar which otherwise turns into a contaminant.
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公开(公告)号：DE60101020T2
公开(公告)日：2004-06-24
申请号：DE60101020
申请日：2001-06-19
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO , OKA KENJI
IPC: C07D317/64
Abstract: Heliotropin is oxidized with a percarboxylic acid in the presence of formic acid and an optionally added organic solvent, to thereby produce sesamol at high efficiency while suppressing by-production of heliotropic acid.
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公开(公告)号：DE69414361T2
公开(公告)日：1999-04-01
申请号：DE69414361
申请日：1994-08-16
Applicant: DAICEL CHEM
Inventor： MORIMOTO YOSHIAKI , TANIGAWA HIROTO , AKITA KAZUYUKI
Abstract: A process for producing acetic anhydride alone or both of acetic anhydride and acetic acid by the reaction of methyl acetate and/or dimethyl ether and, as optional component(s), water and/or methanol with carbon monoxide alone or both of carbon monoxide and hydrogen in the presence of a rhodium compound and methyl iodide as the principal catalysts, wherein trace impurities causative of tar generation is removed by separating the same through distillation in the evaporator and/or in the subsequent refining step, thus reducing the generation of the tar which otherwise turns into a contaminant.
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公开(公告)号：DE10222850B4
公开(公告)日：2013-07-18
申请号：DE10222850
申请日：2002-05-23
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO , OKUMURA KOICHI , UENOYA MASAYA , FUJITANI KANGO , KIHARA YOSHIHIRO
IPC: C07C29/141 , C07C29/80 , C07C33/05
Abstract: Verfahren zur Herstellung von alicyclischem ungesättigten Alkohol mit einer Reinheit von 99 Gew.-% oder mehr, einem Wassergehalt von 0,1 Gew.-% oder weniger und einem Säurewert von 0,1 mg KOH/g oder weniger, wobei das Verfahren umfaßt: (1) das Hydrieren von ungesättigtem cyclischen Aldehyd mit einem Säurewert von 10 mg KOH/g oder weniger in Gegenwart eines Katalysators, wobei der ungesättigte cyclische Aldehyd durch die folgende allgemeine Formel (1) dargestellt ist:worin der Rest R Wasserstoff oder einen Methylrest darstellt; (2) das Terminieren der Hydrierung bei einer Umwandlung von 70 bis 99,8%; und (3) das Rektifizieren des Reaktionsprodukts, das nicht-umgesetzten ungesättigten cyclischen Aldehyd enthält.
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Patent Agency Ranking
公开(公告)号：DE60101020D1
公开(公告)日：2003-11-27
申请号：DE60101020
申请日：2001-06-19
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO , OKA KENJI
IPC: C07D317/64
Abstract: Heliotropin is oxidized with a percarboxylic acid in the presence of formic acid and an optionally added organic solvent, to thereby produce sesamol at high efficiency while suppressing by-production of heliotropic acid.
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公开(公告)号：NO20013046A
公开(公告)日：2001-12-20
申请号：NO20013046
申请日：2001-06-19
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO , OKA KENJI
IPC: C07D317/64 , C07D317/68 , A61K31/36
CPC classification number: C07D317/64
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公开(公告)号：DE69404518T2
公开(公告)日：1997-12-04
申请号：DE69404518
申请日：1994-03-30
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO
Abstract: A concentrated catalyst solution provided in the carbonylation reaction in which methyl acetate or dimethyl ether is chemically bonded with carbon monoxide in the presence of a catalyst system comprising a rhodium compound and an alkali metal iodide to produce acetic anhydride is subjected to a carbonylation treatment with carbon monoxide or a mixture of carbon monoxide and hydrogen before it is applied to a process for separating the tar contained in the catalyst solution, thereby increasing the iodide ion content of the catalyst solution, thus enabling the rhodium compound to be stabilized. When the concentration of the iodide ion in the concentrated catalyst solution is increased by this method, there is no possibility of the balances between the rhodium concentration and, the alkali metal concentration and the iodine concentration of the carbonylation reaction system being disturbed even when the catalyst solution as reprocessed is returned to the carbonylation reaction system. Further, the increase in the iodide ion concentration of the concentrated catalyst solution enables the rhodium compound contained in the concentrated catalyst solution to be stabilized, which prevents the rhodium compound from settling from the catalyst solution even during the heat treatment conducted for the purpose of removing components each having a low-boiling point contained in the catalyst solution before the process for separating and removing tar from the concentrated catalyst solution, so that the loss of the very expensive rhodium compound can be minimized.
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公开(公告)号：DE69404518D1
公开(公告)日：1997-09-04
申请号：DE69404518
申请日：1994-03-30
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO
Abstract: A concentrated catalyst solution provided in the carbonylation reaction in which methyl acetate or dimethyl ether is chemically bonded with carbon monoxide in the presence of a catalyst system comprising a rhodium compound and an alkali metal iodide to produce acetic anhydride is subjected to a carbonylation treatment with carbon monoxide or a mixture of carbon monoxide and hydrogen before it is applied to a process for separating the tar contained in the catalyst solution, thereby increasing the iodide ion content of the catalyst solution, thus enabling the rhodium compound to be stabilized. When the concentration of the iodide ion in the concentrated catalyst solution is increased by this method, there is no possibility of the balances between the rhodium concentration and, the alkali metal concentration and the iodine concentration of the carbonylation reaction system being disturbed even when the catalyst solution as reprocessed is returned to the carbonylation reaction system. Further, the increase in the iodide ion concentration of the concentrated catalyst solution enables the rhodium compound contained in the concentrated catalyst solution to be stabilized, which prevents the rhodium compound from settling from the catalyst solution even during the heat treatment conducted for the purpose of removing components each having a low-boiling point contained in the catalyst solution before the process for separating and removing tar from the concentrated catalyst solution, so that the loss of the very expensive rhodium compound can be minimized.
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公开(公告)号：NO20013046L
公开(公告)日：2001-12-20
申请号：NO20013046
申请日：2001-06-19
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO , OKA KENJI
IPC: C07D317/64 , C07D317/68 , A61K31/36
Abstract: Heliotropin is oxidized with a percarboxylic acid in the presence of formic acid and an optionally added organic solvent, to thereby produce sesamol at high efficiency while suppressing by-production of heliotropic acid.
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