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公开(公告)号：SG44317A1
公开(公告)日：1997-12-19
申请号：SG1995000578
申请日：1995-06-02
Applicant: DAICEL CHEM
Inventor： MIURA HIROYUKI , SHIMIZU MASAHIKO , SATO TAKASHI , MORIMOTO YOSHIAKI , KAGOTANI MASAHIRO
Abstract: A high purity acetic acid is prepared by reacting methanol with carbon monoxide in the presence of a rhodium catalyst, iodide salts, and methyl iodide, wherein an acetaldehyde concentration in the reaction liquid is maintained at 400 ppm or lower. This may be attained by contacting the liquid containing carbonyl impurities with water to separate and remove the carbonyl impurities. After that, the liquid can be returned to the reactor.
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公开(公告)号：JPH0812612A
公开(公告)日：1996-01-16
申请号：JP14965294
申请日：1994-06-30
Applicant: DAICEL CHEM
Inventor： MIURA HIROYUKI , MORIMOTO YOSHIAKI , SATO TAKASHI
Abstract: PURPOSE:To efficiently separate acetaldehyde from methyl iodide by distilling a mixture containing acetaldehyde and methyl iodide under specific condition. CONSTITUTION:A liquid mixture containing acetaldehyde and methyl iodide is distilled at a column top temperature of >=55 deg.C, a reflux tank temperature of >=25 deg.C and a pressure of >=1kg/cm or distilled in the presence of an alcohol at a column top temperature of
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公开(公告)号：JP2006096764A
公开(公告)日：2006-04-13
申请号：JP2005335002
申请日：2005-11-18
Applicant: Daicel Chem Ind Ltd , ダイセル化学工業株式会社
Inventor： MORIMOTO YOSHIAKI , NAKAYAMA HIROYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a method for efficiently separating and removing acetaldehyde from a liquid mixture of acetaldehyde, methyl iodide and water or a method for removing easily and sufficiently acetaldehyde contained in a process liquid to be recycled to a carbonylation reactor and recycling efficiently methyl iodide and water to the reactor in the production of acetic acid by carbonylation of methanol.
SOLUTION: In the method, acetaldehyde is efficiently removed by distilling a liquid mixture containing acetaldehyde of not higher than 5% by weight, methyl acetate of not higher than 10% by weight, acetic acid of 20 to 50% by weight, methyl iodide of 0.1 to 20% by weight and water of 5 to 50% by weight with a distillation column having not less than 40 stages at a reflux ratio of not lower than 10.
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：提供一种有效地从乙醛，甲基碘和水的液体混合物中分离和除去乙醛的方法或用于将待循环至羰基化反应器的工艺液体中容易且足够地除去乙醛的方法 并通过甲醇的羰基化，有效地将甲基碘和水循环到生产乙酸中的反应器中。 解决方案：在该方法中，通过蒸馏含有不高于5重量％的乙醛的液体混合物，不高于10重量％的乙酸甲酯，20至50重量％的乙酸， 甲基碘为0.1〜20重量％，水为5〜50重量％，回流比不低于10℃的蒸馏塔为不少于40个阶段。（C）2006，JPO＆NCIPI
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公开(公告)号：JPH08277244A
公开(公告)日：1996-10-22
申请号：JP10682695
申请日：1995-04-05
Applicant: DAICEL CHEM
Inventor： ONO MITSURU , MORIMOTO YOSHIAKI , KOMORITANI MASAHIRO
Abstract: PURPOSE: To raise productivity of a carboxylic acid such as acetic acid, etc., even in a reaction system haying a low water content and iodide ion concentration. CONSTITUTION: At least one component of an alcohol (methanol, etc.), an organic acid alkyl ester (methyl acetate, etc.) and a dialkyl ether (dimethyl ether, etc.) is reacted with carbon monoxide in the presence of water by constituting a catalytic system composed of a rhodium catalyst, an alkyl halide (methyl iodide) and a compound of an element of the group 3A of the 4 period to the 6 period of the periodic table to produce a carboxylic acid (acetic acid, etc.). The compound of the element of the 3A group includes an oxide and an acetate of scandium, yttrium and lanthanide. The catalytic system may contain an alkali metal iodide such as lithium iodine, etc. The carboxylic acid or its corresponding acid anhydride can be efficiently produced by using the catalytic system even if the water concentration of the reaction system is
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公开(公告)号：JP2514071B2
公开(公告)日：1996-07-10
申请号：JP13193788
申请日：1988-05-30
Applicant: DAICEL CHEM
Inventor： MATSUOKA KAZUYUKI , MORIMOTO YOSHIAKI
IPC: C07C67/055 , B01J31/28 , C07B61/00 , C07C67/035 , C07C69/155
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Patent Agency Ranking
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：JPH0820555A
公开(公告)日：1996-01-23
申请号：JP15440194
申请日：1994-07-06
Applicant: DAICEL CHEM
Inventor： KOMORITANI MASAHIRO , MORIMOTO YOSHIAKI
IPC: B01J31/30 , C07B61/00 , C07C51/12 , C07C51/47 , C07C51/54 , C07C51/56 , C07C51/573 , C07C53/08 , C07C53/12
Abstract: PURPOSE:To provide a new process for manufacturing high purity acetic acid and/or acetic anhydride having reduced amount of an organic iodide and a carbonyl impurity in acetic acid and/or acetic anhydride produced by the carbonylation process in the presence of a rhodium catalyst. CONSTITUTION:Acetic acid and/or acetic anhydride is produced by continuously reacting at least one component selected from methanol, methyl acetate and dimethyl ether with carbon monoxide in the presence of a rhodium catalyst, an iodide salt and methyl iodide. In this process, the acetoaldehyde content in the reaction liquid is controlled
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公开(公告)号：JPH07133249A
公开(公告)日：1995-05-23
申请号：JP127194
申请日：1994-01-11
Applicant: DAICEL CHEM
Inventor： HARANO YOSHIYUKI , MORIMOTO YOSHIAKI
Abstract: PURPOSE:To provide a process for the production of highly pure acetic acid containing only a slight amount of a reductive substance and exhibiting excellent result at the test on a reductive substance against potassium permanganate. CONSTITUTION:In the process for the production of acetic acid comprising the steps of continuously reacting an aqueous solution of methanol and/or methyl acetate with carbon monoxide in a reactor; continuously taking out the reaction mixture from the reactor; and evaporating the obtained reaction mixture in an evaporator to successively distil the resultant evaporated components containing acetic acid in a distillation tower and to take out a distillate from the top of the distillation tower, the process is characterized in that the distillate is treated with ozone to afford the objective highly pure acetic acid.
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公开(公告)号：JPH06336453A
公开(公告)日：1994-12-06
申请号：JP12758793
申请日：1993-05-28
Applicant: DAICEL CHEM
Inventor： MORIMOTO YOSHIAKI , KOMORITANI MASAHIRO
IPC: B01J31/30 , C07B61/00 , C07C51/083 , C07C51/12 , C07C51/54 , C07C53/08 , C07C53/12 , C07C67/37 , C07C69/14
Abstract: PURPOSE:To obtain the subject compounds by effecting the reaction of methanol, methyl acetate or dimethyl ether and carbon monoxide or a combination thereof with hydrogen in the presence of a catalyst in a series of facilities. CONSTITUTION:A rhodium compound and methyl iodide are used as major catalysts to effect the reaction of methyl acetate or dimethyl ether and carbon monoxide or a combination thereof with hydrogen in the first reactor to give acetic anhydride. After most of the catalyst are removed from the reaction mixture, at least a part of the acetic anhydride formed in the first reactor is allowed to react with methanol and/or water in the second reactor to form acetic acid and methyl acetate or acetic acid. The methyl acetate included in the reaction mixture from the second reactor is recycled to the first reactor as a feedstock whereby the production ratio of acetic acid to acetic anhydride can be freely changed. Acetic acid is useful as a starting substance for acetate, acetic anhydride, vinyl acetate and production of terephthalic acid. Acetic anhydride is useful as a starting substance for cellulose acetate, medicines, perfumes, dyes and the like.
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30.发明专利
公开(公告)号：JPH01250338A
公开(公告)日：1989-10-05
申请号：JP7990288
申请日：1988-03-31
Applicant: DAICEL CHEM
Inventor： MATSUOKA KAZUYUKI , MORIMOTO YOSHIAKI
Abstract: PURPOSE:To reuse acetic acid, by reacting propylene with oxygen and the acetic acid in the vapor phase in the presence of a Pd catalyst, charging the reaction product condensate into a distillation column, cutting unreacted substances and by-product sideways from a recovering part thereof, hydrolyzing the subject by-product and returning the obtained hydrolyzate to the distillation column. CONSTITUTION:Propylene is reacted with oxygen and acetic acid in the vapor phase in the presence of a Pd catalyst to afford allyl acetate. In the process, the resultant allyl acetate, acetic acid and a reaction product condensate, obtained after the reaction and containing the allyl acetate, acetic acid, water, allylidene diacetate formed as a by-product and, as necessary, acrolein is charged into a distillation column 1-1 to cut a mixture of the acetic acid with water, allylidene diacetate and acrolein sideways from a recovering part 2-2 of the above-mentioned distillation column as a side stream and the allylidene diacetate in the side-cut liquid is then hydrolyzed in a hydrolytic reactor 3-3. The resultant hydrolyzate is subsequently returned to the distillation column 1-1 to take out the acetic acid without containing the allylidene diacetate from the column bottom part thereof. The catalyst life is long and this method is industrially advantageous.
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