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公开(公告)号：JP2002138087A
公开(公告)日：2002-05-14
申请号：JP2001182037
申请日：2001-06-15
Applicant: DAICEL CHEM
Inventor： TANIGAWA HIROTO , OKA KENJI
IPC: C07D317/64
Abstract: PROBLEM TO BE SOLVED: To provide an effective producing method of sesamol. SOLUTION: Sesamol can be effectively produced by controlling a formation of heliotropine by-product by oxidizing heliotropine with percarboxylic acid in the presence of formic acid and an organic solvent which is added as required.
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公开(公告)号：JPH11140075A
公开(公告)日：1999-05-25
申请号：JP32240997
申请日：1997-11-07
Applicant: DAICEL CHEM
Inventor： UENO TAKASHI , OKA KENJI
IPC: C07D313/02
Abstract: PROBLEM TO BE SOLVED: To provide a method for purifying ε-caprolactone reduced in acid value and moisture content. SOLUTION: A low-boiling fraction contained in a reactional solution is distilled off in the first distillation column to provide the first bottom liquid, which is then fed to the second distillation column having a concentrating section of three or more stages to distill off a low-boiling fraction from the column top of the second distillation column. A high-boiling substance is then taken out of the column bottom of the second distillation column to take out ε- caprolactone from any stage within the range of 30-90% of the number of stages from the feed stage of the second distillation column to the topmost stage from the side of the column bottom.
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公开(公告)号：JP2562620B2
公开(公告)日：1996-12-11
申请号：JP25221787
申请日：1987-10-06
Applicant: DAICEL CHEM
Inventor： HONDA KIMIAKI , OKA KENJI
IPC: C07D303/16 , C07D301/14 , C07D301/19 , C08F20/00 , C08F20/32
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公开(公告)号：JPH06172292A
公开(公告)日：1994-06-21
申请号：JP21874793
申请日：1993-09-02
Applicant: DAICEL CHEM
Inventor： YANAGII TOYOKAZU , ITOKAZU TERUO , OKA KENJI
IPC: B01J31/02 , B01J31/04 , B01J31/22 , C07B43/10 , C07B61/00 , C07C263/04 , C07C265/14 , C07C271/08
Abstract: PURPOSE:To provide a process for producing a diisocyanate compound without using phosgene during the production processes. CONSTITUTION:The production process comprise the steps of reacting carbon monoxide, oxygen and methanol with each other to produce dimethyl carbonate; (6) reacting the dimethyl carbonate with a diamine in the presence of an alkali catalyst to produce an urethane compound; and (c) pyrolyzing the urethane compound in the presence of a catalyst under a vacuum of 1-700Torr to produce the diisocyanate compound. Since the produced diisocyanate compound is substantially free from chlorine, the materials of instillations in the production processes can be selected from a variety of fields.
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公开(公告)号：JPH02134355A
公开(公告)日：1990-05-23
申请号：JP28955788
申请日：1988-11-16
Applicant: DAICEL CHEM
Inventor： YANAGII TOYOKAZU , OKA KENJI
IPC: C07C263/04 , B01D3/00 , B01J31/04 , C07B61/00 , C07C265/00 , C07C265/14
Abstract: PURPOSE:To enable economical production of the compound which is used as a starting substance for polyurethane or the like without use of phosgen by pyrolyzing a urethane compound in a solvent of a high boiling point in the presence of a catalyst. CONSTITUTION:A urethane compound is pyrolyzed in a high-boiling solvent such as m-terphenyl in the presence of a metal or metal compound catalyst selected from Mn, Mo, W, and Zn at 150 to 300 deg.C under a reduced pressure of 1 to 700Torr. At that time, the catalyst is mixed with methanol and the objective diisocyanate and fed con-tinuously to the column zone in the reactive distillation column. The amount of the catalyst is preferably in the range from 0.005 to 5wt.% based on the solvent, and the methanol is 0.2 to 1,000 fold weight of the catalyst, while the diisocyanate is 0.001 to 1,000 fold weight of the methanol.
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Patent Agency Ranking
公开(公告)号：JPH01186876A
公开(公告)日：1989-07-26
申请号：JP1008388
申请日：1988-01-20
Applicant: DAICEL CHEM
Inventor： HONDA KIMIAKI , OKA KENJI
IPC: C07D301/03 , C07D303/16
Abstract: PURPOSE:To readily obtain the title low-viscosity compound, having low odor and solubility in a wide range of resins and useful as ink, coating, etc., in good yield, by epoxidizing an acrylate or methacrylate compound with an oxidizing agent using piperidine as a polymerization inhibitor. CONSTITUTION:A cyclohexenyl (meth)acrylate compound which is a colorless and transparent liquid obtained by esterifying tetrahydrobenzaldehyde with (meth)acrylic acid, etc., used as an intermediate raw material for epoxy resins and expressed by formula I (R is H or CH3) is reacted and epoxidized in the presence of an oxidizing agent, such as peracetic acid or tert-butyl hydroperoxide, and a piperidine polymerization inhibitor, preferably in a solvent, such as ethyl acetate, at
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公开(公告)号：JPS6485956A
公开(公告)日：1989-03-30
申请号：JP31618087
申请日：1987-12-16
Applicant: DAICEL CHEM
Inventor： YANAGII TOYOKAZU , ITOKAZU TERUO , OKA KENJI
IPC: B01J27/053 , B01J27/08 , B01J31/02 , B01J31/04 , B01J31/22 , C07B61/00 , C07C67/00 , C07C239/00 , C07C241/00 , C07C263/04 , C07C265/00 , C07C265/14 , C07C269/04 , C07C271/08
Abstract: PURPOSE:To obtain the titled compound in good yield, by reacting an amine compound with dimethyl carbonate in the presence of an alkaline catalyst and thermally decomposing the resultant urethane compound in the presence of a specific metallic compound in a high-boiling solvent. CONSTITUTION:A diamine is reacted with dimethyl carbonate in the presence of an alkaline catalyst consisting of an alkaline (earth) metal alcoholate, especially sodium methylate at 2-50 charging molar ratio of the latter to the former at 30-80 deg.C temperature to provide the corresponding urethane compound, which is then thermally decomposed in the presence of a catalyst of a simple metal selected from Mn, Mo, W and Zn or a compound thereof in a high-boiling solvent (e.g. terphenyl or mixed diphenylbenzene or partially hydrogenated triphenyl) under 1-700Torr reduced pressure to afford the corresponding diisocyanate compound.
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公开(公告)号：JPS62205071A
公开(公告)日：1987-09-09
申请号：JP4790286
申请日：1986-03-05
Applicant: DAICEL CHEM
Inventor： YANAGII TOYOKAZU , OKA KENJI
IPC: C07D303/24 , C07D301/28 , C08G65/32
Abstract: NEW MATERIAL:An epoxy compound of formula I (R is group of formula II-VI; one of A and B is H and the other is H, CH3 or C2H5; n is integer of >=1 and
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公开(公告)号：JPS6172774A
公开(公告)日：1986-04-14
申请号：JP19428484
申请日：1984-09-17
Applicant: Daicel Chem Ind Ltd
Inventor： HATTORI SHINJI , OKA KENJI
IPC: C07D301/14
Abstract: PURPOSE: In the epoxidization of a compound with carbon-carbon double bonds with a percarboxlic acid, the concentration of carboxylic acid in the system is kept lower than a specific value by dilution with only an organic solvent to enable side-reactions to be inhibited and the titled compound to be produced in high yield with advantage.
CONSTITUTION: In the epoxidization of a compound with carbon-carbon double bonds with a percarboxylic acid, the concentration of carboxylic acids in the system is kept less than 2.0mol/kg, preferably less than 1.7mol/kg by diluting the reaction system with only organic solvents to inhibit side-reactions. Thus, the yield is increased and the installation and operations of the reaction can be simplified. The amount of the percarboxylic acid used is preferably 0.8W1.5 equivalent based on the double bonds and the reaction temperature is preferably 10W50°C.
COPYRIGHT: (C)1986,JPO&JapioAbstract translation: 目的：在具有碳 - 碳双键的化合物与过羧酸的环氧化中，通过仅用有机溶剂稀释使系统中羧酸的浓度保持低于特定值，以使副反应被抑制， 优选以高产率生产的标题化合物。 构成：在具有碳 - 碳双键与过羧酸的化合物的环氧化中，通过仅用稀释反应体系将体系中羧酸的浓度保持在2.0mol / kg以下，优选小于1.7mol / kg 有机溶剂抑制副反应。 因此，产率提高，可以简化反应的安装和操作。 所使用的过羧酸的量优选为基于双键的0.8-1.5当量，反应温度优选为10-50℃。
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公开(公告)号：JPH04217637A
公开(公告)日：1992-08-07
申请号：JP41774390
申请日：1990-12-17
Applicant: DAICEL CHEM
Inventor： OKA KENJI
Abstract: PURPOSE:To produce diglycerol usable as a cosmetic grade of high grade to pass functional tests from purified diglycerol not to pass the cosmetic grade, having such an analyzed value of acroleins by gas chromatography as an amount not to be analyzed. CONSTITUTION:A method of producing colorless odorless diglycerol wherein a colored distillation residue containing diglycerol prepared as a by-product in manufacturing glycerol is (a) continuously distilled and crude diglycerol liquid is taken out from a column top liquid, (b) the crude diglycerol liquid is treated with active carbon, then (c) distilled and taken out from the column top. Diglycerol usable as a cosmetic grade can be produced.
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