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公开(公告)号：JP2000044528A
公开(公告)日：2000-02-15
申请号：JP23121298
申请日：1998-08-03
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , MIHO TAKUYA , YANAGII TOYOKAZU
Abstract: PROBLEM TO BE SOLVED: To obtain an alicyclic diisocyanate composition for extremely activating a urethanization reaction, containing no impurity, capable of providing a polyurethane having improved weather resistance, etc., by including an alicyclic diisocyanate compound containing a fixed amount of a protonic acid as a main component. SOLUTION: This composition comprises an alicyclic diisocyanate compound of formula I (Y1 is a bifunctional saturated hydrocarbon, preferably a 1-10C alkylene) (e.g. 3-isocyanatomethyl-5,5-dimethylcyclohexyl isocyanate) containing a protonic acid (preferably a saturated organic acid) as a main component. The compound of formula I is obtained by reacting a dialkyl carbonate prepared without using phosgene with an alicyclic diamine of formula II. The amount of the protonic acid added to the alicyclic diisocyanate compound of formula I is preferably 1×10-7 to 1×10-1 equivalent based on 1 equivalent of NCO group.
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公开(公告)号：JPH11228566A
公开(公告)日：1999-08-24
申请号：JP5000998
申请日：1998-02-17
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , SHIMADA GIICHI
IPC: C07D317/26
Abstract: PROBLEM TO BE SOLVED: To efficiently obtain the subject compound that is useful as a synthetic intermediate for medicines and agricultural chemicals by reaction between a dialdehyde and a diol at a specific ratio followed by the reaction of the resultant dialdehyde bisacetal with the dialdehyde. SOLUTION: In the first step, (A) a dialdehyde of formula I (R is a hydrocarbon residual group), for example, glutaraldehyde or the like, is allowed to react with a double or more molar amount, based on the component (A), of a diol of the formula: HO-R -OH (R is a hydrocarbon residual group), for example, ethylene glycol preferably in the presence of an acid catalyst such as a cationic ion-exchange resin or the like, preferably at 30-150 deg.C to form (C) a dialdehyde bisacetal of formula II, for example, glutaraldehyde bisacetal. In the second step, the product (C) is allowed to react with anhydrous component A preferably in the presence of the same catalyst as in the first step at the same reaction temperature as in the first step to give the objective compound of formula III.
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公开(公告)号：JPH09100251A
公开(公告)日：1997-04-15
申请号：JP27841695
申请日：1995-10-02
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a vinyl ether, capable of stably producing the vinyl ether in improved efficiency by the pyrolysis of an acetal in the presence of a specific reaction catalyst high in the catalytic activity, little in the deposition of coke and long in the catalytic life. SOLUTION: The method for producing the vinyl ether such as methyl vinyl ether comprises thermally decomposing an acetal such as acetaldehyde dimethylacetal in the presence of silica holding the highest acid strength in a range: +3.3
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公开(公告)号：JPH06340570A
公开(公告)日：1994-12-13
申请号：JP13177793
申请日：1993-06-02
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , SHIMADA GIICHI
Abstract: PURPOSE:To effectively prevent acrolein from polymerizing in producing, etc., the acrolein useful as a raw material, etc., for producing organic compounds by the coexistence of a polymerization inhibitor and oxalic acid in an aqueous solution of the acrolein containing iron ions dissolved therein. CONSTITUTION:A reactional gas containing acrolein after carrying out the vapor-phase oxidation of propylene is cooled with a large amount of water and the produced acrolein is simultaneously absorbed in water to provide an aqueous solution of the acrolein containing iron ions dissolved therein. A polymerization inhibitor such as hydroquinone, hydroquinone monomethyl ether, benzoquinone, p-nitrosophenol, p-aminophenol, m-dinitrobenzene, phenothiazine or Methylene Blue and oxalic acid are then added to coexist in the aqueous solution. Thereby, the acrolein is effectively prevented from polymerizing in a process for producing the acrolein important as a raw material for producing methionine, acrylic acid derivatives and other organic compounds.
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公开(公告)号：JPH06172238A
公开(公告)日：1994-06-21
申请号：JP32821392
申请日：1992-12-08
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , SHIMADA GIICHI
Abstract: PURPOSE:To obtain a method for producing tetrahydrobenzyl alcohol or vinylcyclohexene with minimized amount of by-produced butadiene polymer to a loss of a raw material. CONSTITUTION:This method for producing tetrahydrobenzyl alcohol or vinylcyclohexane comprises effecting the reaction in the coexistence of a metallic alkoxide in an amount of =5kg/cm pressure in synthesizing the tetrahydrobenzyl alcohol by the Diels- Alder reaction of butadiene with allyl alcohol or the vinylcyclohexene by the Diels-Alder reaction of the butadiene.
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Patent Agency Ranking
公开(公告)号：JPH0267261A
公开(公告)日：1990-03-07
申请号：JP21944088
申请日：1988-09-01
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , KOJIMA HIDETAKA
IPC: C07C263/00 , C07C67/00 , C07C241/00 , C07C263/18 , C07C265/00
Abstract: PURPOSE:To obtain the title compound in high yield by reacting a primary amine with a carbonic acid diester in the presence of an alkali metal or alkaline earth metal alcoholate as a catalyst, treating the crude reaction product with an acid type cation exchange resin to remove the catalyst and thermally decomposing. CONSTITUTION:A primary amine (e.g. isophorone diamine) is reacted with a carbonic acid diester (e.g. dimethyl carbonate) in the presence of an alkali metal or alkaline earth metal alcoholate (e.g. sodium methylate) as a catalyst, the prepared crude reaction solution is treated with an acid type cation exchange resin (e.g. one prepared by bonding an acid group such as carboxylic acid group to polystyrene skeleton), the alcoholate catalyst eluted in the solution is separated and removed and then the solution is thermally decomposed to give an isocyanate. The used resin is treated with an acid and can be reused. This method is industrially advantageous because phosgene is not used. The isocyanate is used as a raw material for producing urethane, drugs, agricultural chemicals, etc.
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公开(公告)号：JPS62263140A
公开(公告)日：1987-11-16
申请号：JP10640386
申请日：1986-05-09
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , TSUJI YASUO , KOJIMA HIDETAKA
Abstract: PURPOSE:To obtain the titled substance exhibiting pharmacological activities such as analgesic, anti-inflammatory and antipyretic actions, in high yield, by reacting an alpha-phenylethyl alcohol derivative with carbon dioxide using a specific solvent produced by mixing a hydrocarbon with an oxygen-containing organic compound. CONSTITUTION:The compound of formula II is produced by reacting an alpha-phenyl alcohol derivative of formula I (R is H, alkyl, alkenyl or aryl) with carbon monoxide usually at 30-130 deg.C, preferably at 60-100 deg.C under atmospheric pressure - 100kg/cm in a solvent produced by mixing a hydrocarbon with an oxygen-containing organic compound, in the presence of a catalyst (preferably a transition metal compound) preferably using a rhodium compound as a catalyst and iodine as a cocatalyst. The hydrocarbon used in the above solvent is pentane, benzene, etc., and the oxygen-containing organic compound is acetic acid, etc. The ratio of the solvent components is e.g. preferably 2/98-30/70 by volume in the case of acetic acid/hexane.
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公开(公告)号：JPS62242642A
公开(公告)日：1987-10-23
申请号：JP8653086
申请日：1986-04-15
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , TSUJI YASUO , KOJIMA HIDETAKA
IPC: C07B61/00 , B01J27/00 , B01J27/13 , B01J31/00 , B01J31/04 , B01J31/20 , C07C51/00 , C07C51/12 , C07C57/30 , C07C57/32 , C07C67/00
Abstract: PURPOSE:In carbonylating an alpha-phenylethyl alcohol derivative, to obtain the titled compound advantageously, by adding a rhodium catalyst and an iodine compound in a specific ratio to the reaction system and specifying concentration of water in the reaction solution and reaction temperature. CONSTITUTION:A compound shown by formula I (R is H, alkyl, alkenyl or aryl) is reacted with carbon monoxide in the presence of (A) a rhodium catalyst such as rhodium halide, rhodium carbonyl, rhodium acetate, etc., and (B) an iodine compound such as I2, HI, alkyl iodide, etc., as a cocatalyst in a ratio of the component A:B (atomic ratio of Rh:I) = 1:0.5-1:6 in
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公开(公告)号：JPS62242641A
公开(公告)日：1987-10-23
申请号：JP8653186
申请日：1986-04-15
Applicant: DAICEL CHEM
Inventor： TANAKA YASUTAKA , KOJIMA HIDETAKA
IPC: C07B61/00 , B01J27/00 , B01J27/13 , B01J31/00 , B01J31/04 , B01J31/20 , C07C51/00 , C07C51/12 , C07C51/48 , C07C57/30 , C07C67/00
Abstract: PURPOSE:To obtain the titled compound advantageously, by carbonylating an alpha-phenylethyl alcohol derivative in the presence of a rhodium catalyst, etc., adding the prepared reaction solution to water in the presence of zinc iodide, separating the mixture into two phases and repeatedly using the catalyst. CONSTITUTION:A compound shown by formula I (R is H, alkyl, alkenyl or aryl) is reacted with carbon monoxide in the presence of a rhodium catalyst and an iodine compound to give a reaction solution containing the aimed compound shown by the formula II. Water is added to the reaction solution in the presence of zinc iodide, the reaction solution is separated into two phases of a reaction product phase and a hydrous phase. The catalyst in the hydrous phase is repeatedly used to give the aimed compound useful as analgesic, etc., industrially advantageously. Since the zinc iodide prevents insoluble rhodium from precipitating, makes operation of the phase separation easy and has no bad influence on carbonylation activity of the catalyst at all, the separated catalyst can be returned to the reaction state directly in the state of the mixture with zinc iodide and circulated and used efficiently.
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公开(公告)号：JP2010104938A
公开(公告)日：2010-05-13
申请号：JP2008281084
申请日：2008-10-31
Applicant: Daicel Chem Ind Ltd , ダイセル化学工業株式会社
Inventor： TANAKA YASUTAKA , YAMAURA RYO
CPC classification number: Y02P20/584
Abstract: PROBLEM TO BE SOLVED: To provide a method for regenerating a copper catalyst, in which the solid copper catalyst deactivated by sintering or adsorption of a sulfur-containing catalyst poison component can be regenerated efficiently.
SOLUTION: The solid copper catalyst deactivated by sintering or adsorption of the sulfur-containing catalyst poison component (for example, a sulfide compound such as dimethyl sulfide) is oxidized by an oxygen-containing gas and the oxidized solid copper catalyst is reduced by a hydrogen-containing gas to regenerate the deactivated solid copper catalyst. The deactivated catalyst may be the copper catalyst deactivated in a process for producing aldehyde by dehydrogenating alcohol. The deactivated catalyst can be oxidized directly by the oxygen-containing gas without being subjected to oil removal treatment using a solvent or pretreatment using the hydrogen-containing gas. The reduction treatment using the hydrogen-containing gas can be performed in a gas phase.
COPYRIGHT: (C)2010,JPO&INPITAbstract translation: 要解决的问题：提供一种再生铜催化剂的方法，其中可以有效地再生通过烧结或吸附含硫催化剂毒物成分而失活的固体铜催化剂。 解决方案：通过烧结或吸附含硫催化剂毒物成分（例如硫化物化合物如二甲基硫醚）而使活化的固体铜催化剂被含氧气体氧化，氧化的固体铜催化剂被还原 通过含氢气体再生失活的固体铜催化剂。 失活的催化剂可以是在通过脱氢醇生产醛的方法中使铜催化剂失活。 失活的催化剂可以通过含氧气体直接氧化，而不用使用溶剂进行除油处理或使用含氢气体进行预处理。 使用含氢气体的还原处理可以在气相中进行。 版权所有（C）2010，JPO＆INPIT
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