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91. 发明专利

JPH08281077A PRODUCTION OF ORGANIC ACID 失效
公开(公告)号：JPH08281077A
公开(公告)日：1996-10-29
申请号：JP9254695
申请日：1995-04-18
申请人： TOKUYAMA CORP
发明人： HANADA FUMIO , YAMAMOTO MITSUGI , KOBAYASHI TARO
IPC分类号： B01D61/44 , B01D61/46 , C07B63/00 , C07C51/02 , C07C59/08 , C07C59/265
摘要： PURPOSE: To produce an org. acid from the weakly basic salt of an org. acid at a low voltage with high current efficiency by electrodialysis using a bipolar membrane. CONSTITUTION: A bipolar membrane and an anion-exchange membrane are alternately arranged between electrodes to form the acid compartment and base compartment of an electrodialyzer. An aq. soln. contg. a weakly basic salt of an org. acid is supplied to the base compartment. An aq. soln. contg. a salt, e.g. sodium chloride, which is dissociated in a strong acid such as hydrochloric acid or in water is supplied to the acid compartment to bring about electrodialysis, and an org. acid is formed in the acid compartment to obtain the org. acid.

92. 发明专利

JPH0796522B2 失效
公开(公告)号：JPH0796522B2
公开(公告)日：1995-10-18
申请号：JP7916186
申请日：1986-04-08
IPC分类号： C07C51/02 , B01J41/04 , B01J47/00 , B01J49/00 , C07C51/00 , C07C51/47 , C07C53/00 , C07C57/04 , C07C57/07 , C07C67/00

93. 发明专利

JPH0791217B2 失效
公开(公告)号：JPH0791217B2
公开(公告)日：1995-10-04
申请号：JP29244288
申请日：1988-11-21
IPC分类号： C07C51/02 , C07C59/68

94. 发明专利

JPH07216571A METHOD OF OBTAINING CARBOXYLIC ACID FROM ITS SALT 失效
公开(公告)号：JPH07216571A
公开(公告)日：1995-08-15
申请号：JP31027394
申请日：1994-12-14
申请人： BASF AG
发明人： HARUTOBUIHI FUOSU
IPC分类号： B01D61/44 , C07C51/02 , C07C227/40 , C07C229/16 , C07C229/24 , C25B3/00

95. 发明专利

JPH0565247A 4',4'-(ALKYLENEDIOXY)-BIS(BIPHENYL-4-CARBOXYLIC ACID), ITS DERIVATIVE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0565247A
公开(公告)日：1993-03-19
申请号：JP4337292
申请日：1992-02-28
申请人： TEIJIN LTD
发明人： NAKAISHI AKIO , INADA HIROO , MATSUMURA SHUNICHI
IPC分类号： C07C67/31 , C07C51/02 , C07C51/367 , C07C65/21 , C07C69/94
摘要： PURPOSE:To obtain a new 4', 4'-(alkylenedioxy)-bis(biphenyl-4-carboxylic acid) useful as a producing raw material for polyester, polyamide, etc., and its derivative. CONSTITUTION: 4', 4'-(Alkylenedioxy)-bis(biphenyl-4-carboxylic acid) of the formula [(n) is integer of 2-6; R is OR' (R' is H, lower alkyl, cycloalkyl or aryl) or halogen] and its derivative, e.g. 4', 4'-(ethylenedioxy)-bis(biphenyl-4- carboxylic acid ethyl ester). The compound of the formula is obtained by reacting an alkali metal salt of 4'-hydroxy-biphenyl-4-carboxylic acid or its ester with a, alpha, beta-dihalogenated alkylene.

96. 发明专利

JPH04224544A PRODUCTION OF 2,3,6,7-NAPHTHALENETETRACARBOXYLIC ACID 失效
公开(公告)号：JPH04224544A
公开(公告)日：1992-08-13
申请号：JP41444190
申请日：1990-12-26
申请人： NIPPON KOKAN KK
发明人： TACHIBANA YAKUDO , MORI HIROAKI , TAKEI NOBUHIRO , YANAGIUCHI MAMORU , SUZUKI TOSHIFUMI
IPC分类号： B01J23/06 , B01J27/08 , B01J27/138 , B01J27/232 , B01J31/04 , C07B61/00 , C07C51/02 , C07C51/15 , C07C63/40
摘要： PURPOSE:To produce 2,3,6,7-naphthalenetetracarboxylic acid from naphthalene and an aromatic carboxylate as raw materials in high yield and selectivity. CONSTITUTION:2,3,6,7-Naphthalenetetracarboxylic acid is produced by a method for production characterized in that naphthalene and a sodium aromatic carboxylate are thermally reacted in the presence of a carboxyl group transfer catalyst at 400-500 deg.C under pressure of gaseous carbon dioxide. The molar ratio of the carboxylic group of the sodium aromatic carboxylate to the naphthalene is 1:(1-10), preferably 1:(2-4).

97. 发明专利

JPH03503642A 失效
公开(公告)号：JPH03503642A
公开(公告)日：1991-08-15
申请号：JP50434789
申请日：1989-03-30
IPC分类号： B01J23/644 , C07B61/00 , C07C51/02 , C07C51/235 , C07C51/255 , C07C59/70

98. 发明专利

JPH02283289A PREPARING AND PURIFYING PROCESS FOR SUCCINIC ACID 失效
公开(公告)号：JPH02283289A
公开(公告)日：1990-11-20
申请号：JP34510789
申请日：1989-12-28
申请人： MICHIGAN BIOTECH INST
发明人： DEEBUITSUDO EI GURASUNAA , RASHIN DATSUTA
IPC分类号： C07C51/02 , C07C55/10 , C12P7/46 , C12R1/01

99. 发明专利

JPS62238231A PRODUCTION OF CARBOXYLIC ACID FROM AQUEOUS SOLUTION OF AMMONIUM CARBOXYLATE 失效
公开(公告)号：JPS62238231A
公开(公告)日：1987-10-19
申请号：JP7916186
申请日：1986-04-08
申请人： LIGHT OIL UTILIZATION RES ASS
发明人： NAGANO OSAMU , KAWAKAMI KIYOSHI
IPC分类号： C07C51/02 , B01J41/04 , B01J47/00 , B01J49/00 , C07C51/00 , C07C51/47 , C07C53/00 , C07C57/04 , C07C57/07 , C07C67/00
摘要： PURPOSE:Carboxylic acid ion is adsorbed from an aqueous solution of ammonium carboxylate with an anion exchange resin and the adsorbed carboxylic acid ion is eluted and recovered as carboxylic acid in high efficiency using an organic solvent. CONSTITUTION:A carboxylic acid and ammonia are separated from an aqueous solution of an ammonium carboxylate (e.g. ammonium salicylate, ammonium benzoate, ammonium acrylate, etc.). The above process is carried out by adsorbing the carboxylic acid ion to an anion exchange resin (especially preferably weakly basic anion exchange resin) and eluting and recovering the carboxylic acid using an organic solvent (especially preferably dimethyl sulfoxide, pyrrolidone, etc.). EFFECT:The decomposition reaction can be quantitatively performed at a low temperature. When a specific alcohol is used as the elution solvent, an alcoholic solution of carboxylic acid is produced to enable direct esterification of the acid.

100. 发明专利

JPS6191154A Production of d-lactic acid 失效
标题翻译： D-乳酸的生产
公开(公告)号：JPS6191154A
公开(公告)日：1986-05-09
申请号：JP21245584
申请日：1984-10-12
申请人： Toray Ind Inc
发明人： SODA KENJI , SATOU HARUYO , TANAKA NORIKO , IMAMURA SHINZO
IPC分类号： C07C59/08 , C07C51/00 , C07C51/02 , C07C51/367 , C07C67/00 , C12P7/56 , C12P41/00 , C12R1/40
摘要： PURPOSE:To produce L-lactic acid from a reaction mixture of D-lactic acid and unreacted D-2-chloropropionic acid, by heating the mixture under specific condition, thereby reacting only the propionic acid with water while keeping the D-lactic acid in the mixture from the influence of heat. CONSTITUTION:DL-2-Chloropropionic acid or its alkali metal salt or alkaline earth metal salt is made to react with water in the presence of a dehalogenation enzyme (e.g. haloacid dehalogenase) reacting specifically and exclusively to the L-isomer of DL-2-chloropropionic acid, and the unreacted alkali metal salt or alkaline earth metal salt of D-2-chloropropionic acid containing the resultant D-lactic acid or its alkali metal salt or alkaline earth metal salt is heated in the presence of water at 40-120 deg.C, preferably 60-110 deg.C to obtain D-lactic acid. EFFECT:Simple operation. It is not necessary to separate D-lactic acid from D-2-chloropropionic acid.
摘要翻译：目的：通过在特定条件下加热混合物，由D-乳酸和未反应的D-2-氯丙酸的反应混合物生产L-乳酸，仅使丙酸与水反应，同时保持D-乳酸混合物受热的影响。构成：使DL-2-氯丙酸或其碱金属盐或碱土金属盐在脱卤酶（例如卤代酸脱卤酶）存在下与水反应，所述脱卤酶（例如，卤代酸脱卤酶）与DL-2- 氯丙酸和含有所得D-乳酸或其碱金属盐或碱土金属盐的D-2-氯丙酸的未反应的碱金属盐或碱土金属盐在水的存在下在40-120度加热优选60-110℃，得到D-乳酸。效果：操作简单。没有必要将D-乳酸与D-2-氯丙酸分离。

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