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公开(公告)号：JPH0859542A
公开(公告)日：1996-03-05
申请号：JP19069994
申请日：1994-08-12
Applicant: DAICEL CHEM
Inventor： KIMURA SATOSHI , UENO TAKASHI , MORIMOTO YOSHIAKI
Abstract: PURPOSE: To economically purify high-quality acetic acid capable of attaining high potassium permanganate test value by saved energy without adding a chemical in order to separate impurities. CONSTITUTION: This method for purifying acetic acid comprises producing a high-quality acetic acid product by purifying acetic acid using a distillation tower having >=30 stages operated in >=4 reflux ratio under 40-760mm Hg pressure in purification of acetic acid containing impurities comprising at least one component from among an organic iodine compound, a metal iodine compound, an iodine ion, an unsaturated compound and a carbonyl compound.
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公开(公告)号：JPH0280320A
公开(公告)日：1990-03-20
申请号：JP23133488
申请日：1988-09-14
Applicant: DAICEL CHEM
Inventor： UENO TAKASHI , SHIMA KOJI
Abstract: PURPOSE:To recover a transition metal catalyst remaining in trace amt. in a reaction product obtd. by using the transition metal catalyst efficiently by a simple operation by extracting the reaction product with a halogen-contg. aq. soln. CONSTITUTION:A transition metal catalyst remaining in a reaction product obtd. by using the transition metal catalyst is separated by extracting with a halogen compd. or an aq. soln. contg. halogen. The transition metal catalyst means a simple substance or a compd. of a transition metal which has been used generally as catalyst, including transition metals such as Fe, Co, Ni, Cr, Cu, Rh, Pd, Pt, Ir. Suitable halogen compds. are hydrides and alkali metal salts of F, Cl, I, and Br, and suitable halogens are Cl, and I. Hydrochloric acid (HCl), and hydroiodic acid are particularly preferred. Suitable concn. of the transition metals is within a range from 5wt.% to saturation concn. Preferred vol. ratio of the reaction product/extracting liquid is 99/1-20/80.
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公开(公告)号：JPH115788A
公开(公告)日：1999-01-12
申请号：JP17120097
申请日：1997-06-13
Applicant: DAICEL CHEM
Inventor： UENO TAKASHI , KAMEI NOBORU
IPC: C07D313/04
Abstract: PROBLEM TO BE SOLVED: To provide an ε-caprolactone having reduced acid value and APHA (the value testing the stability to thermal discoloration) and a purification process therefor. SOLUTION: In the purification process for ε-caprolactone in which the reaction mixture obtained by oxidizing cyclohexanone is distilled to separate impurities, the lower boiling fraction included in the reaction mixture is distilled off in the first distillation column 1, then the first bottom 4 is fed between the lowermost step not including the bottom of the second distillation column 5 and the middle of the distillation column and ε-caprolactone is distilled off from from the first bottom 4 to separate from the high-boiling impurities.
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公开(公告)号：JPH0725814A
公开(公告)日：1995-01-27
申请号：JP16920593
申请日：1993-07-08
Applicant: DAICEL CHEM
Inventor： UENO TAKASHI , TSUJI YASUO , MORIMOTO YOSHIAKI
Abstract: PURPOSE:To provide a method for producing highly pure acetic acid having a sufficient quality, namely an excellent permanganate time, by a purification method comprising only a conventional purification process without requiring a purification treatment process such as an ozone treatment. CONSTITUTION:A method for producing acetic acid by continuously reacting methanol and/or a methyl acetate aqueous solution with carbon monoxide in the presence of a rhodium complex as a catalyst and methyl iodide as a cocatalyst is characterized in that acetaldehyde is separated from a process liquid circulated in a reactor to maintain the concentration of the acetaldehyde to
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公开(公告)号：JPH02164841A
公开(公告)日：1990-06-25
申请号：JP31801788
申请日：1988-12-16
Applicant: DAICEL CHEM
Inventor： UENO TAKASHI , SHIMA KOJI
Abstract: PURPOSE:To obtain the subject compound in high efficiency by adding an acidic compound and a compound capable of forming a complex with rhodium to a reaction system and carbonylating an alpha-arylethyl alcohol in the presence of the rhodium catalyst and an iodine compound under specific condition. CONSTITUTION:The subject compound useful as an analgesic, anti-inflammatory and antipyretic agent is produced by reacting (A) an alpha arylethyl alcohol with CO in the presence of (B) a rhodium catalyst and (C) an iodine compound. In the above process, the atomic ratio of Rh:I in the components B and C is adjusted to 1: (0.5-1.6) and the reaction system is added with (D) a compound capable of forming a complex with Rh (especially phosphine) and (E) an acidic compound (especially an organic acid or inorganic acid) in such a manner as to get an Rh:D molar ratio of 1: (0.01-10) and an A:E molar ratio of 1: (0.1-5). The process is profitable because the objective compound can be produced in high yield and high space-time yield at decreased catalyst concentration and suppressed formation of by-products without lowering the rate of reaction even under a high reaction pressure.
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Patent Agency Ranking
公开(公告)号：JPH1025264A
公开(公告)日：1998-01-27
申请号：JP19853596
申请日：1996-07-10
Applicant: DAICEL CHEM
Inventor： WATANABE HITOSHI , UENO TAKASHI
IPC: B01J31/10 , C07B61/00 , C07C51/083 , C07C53/08
Abstract: PROBLEM TO BE SOLVED: To obtain a carboxylic acid useful as an industrial raw material for agrochemicals, medicines, chemicals, etc., under mild conditions by reacting an organic acid anhydride with water in the presence of a strongly acidic cation exchange resin. SOLUTION: An organic acid anhydride is reacted with water in the presence of a strongly acidic cation exchange resin at 20-90 deg.C, preferably 20-50 deg.C to provide the objective carboxylic acid. Acetic acid anhydride, propionic anhydride, etc., is exemplified as the organic acid anhydride and the organic acid anhydride diluted with a diluting solvent (e.g. acetic acid or propionic acid) may be used when reacted with water. Water is used in an amount of 0.5-100mol based on 1mol organic acid anhydride. Since the reaction is carried out under mild conditions, decomposition of the resultant carboxylic acid can be avoided and conversion of the organic acid anhydride can be increased.
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公开(公告)号：JP2580290B2
公开(公告)日：1997-02-12
申请号：JP29194888
申请日：1988-11-18
Applicant: DAICEL CHEM
Inventor： SAEKI KAZUHIKO , UENO TAKASHI , SHIMA KOJI
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公开(公告)号：JPH0248544A
公开(公告)日：1990-02-19
申请号：JP19848988
申请日：1988-08-09
Applicant: DAICEL CHEM
Inventor： OOYAMA KIYUUICHI , SAEKI KAZUHIKO , UENO TAKASHI
Abstract: PURPOSE:To readily obtain the subject compounds as a medicine having pharmacological actions such as analgesic action, antiphlogistic action and alleviation of fever in high yield with industrial advantage by reacting an alpha-phenylethyl alcohol derivative with CO in the presence of a catalyst using a specified solvent. CONSTITUTION:An alpha-phenylethyl alcohol derivative of formula I (R is H, alkyl, alkenyl or aryl) is reacted with CO in the presence of a catalyst such as rhodium iodide in a mixture solvent of a hydrocarbon such as hexane and alpha- phenylpropionic acid derivative, preferably at 60-100 deg.C, preferably under ordinary pressure-100kg/cm CO to obtain the objective compound of formula II. As the mixture ratio of the above-mentioned solvents, for example the weight ratio of the alpha-phenylpropionic acid derivative/hexane is (1/30)-(1/8). The alpha- phenylpropionic acid derivative used as the solvent may be different from the objective compound obtained as the reaction product but the same compound as the reaction product is better considering purification, etc., after the reaction.
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公开(公告)号：JP2002179667A
公开(公告)日：2002-06-26
申请号：JP2000381017
申请日：2000-12-14
Applicant: DAICEL CHEM
Inventor： UENO TAKASHI
IPC: C07D313/04
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing high quality ε-caprolactone in high yield without changing reaction condition of the oxidation of cyclohexanone based on a detailed examination of methods separating the ε-caprolactone in the distillation of the obtained crude reaction liquid and collecting the unreacted cyclohexanone. SOLUTION: In this method the crude reaction liquid obtained from oxidation of the cyclohexanone is supplied to a first distillation column, a low boiling point first distillation liquid including unreacted cyclohexanone, or the like, is distilled away from the overhead, a first bottom product of high boiling point including ε-caprolactone, or the like, is collected from the bottom, and then the first distillation liquid is introduced into a second distillation column connected to the overhead of the first distillation column, a low boiling point second distillation liquid and a second bottom product including unreacted cyclohexanone are together obtained, the first bottom product is introduced into a third distillation column connected to the bottom of the first distillation column to obtain a third distillation liquid including ε-caprolactone, and a third bottom product is obtained from the bottom of the column, and the second bottom product is returned to the raw material cyclohexanone.
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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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