Title:
METHOD FOR MANUFACTURING 4,4'-OXYDIPHTHALIC ACID AND METHOD FOR MANUFACTURING 4,4'-OXYDIPHTHALIC DIANHYDRIDE
Document Type and Number:
WIPO Patent Application WO/2013/140506
Kind Code:
A1
Abstract:
Provided is a method for manufacturing 4,4'-oxydiphthalic acid with favorable productivity and high-yield via 4,4'-oxydiphthalonitrile, using 4-nitrophthalonitrile as a reaction raw material; the method including a hydrolysis step for hydrolyzing the 4,4'-oxydiphthalonitrile under acidic conditions, the hydrolysis being achieved by heating the 4,4'-oxydiphthalonitrile in the presence of an aliphatic carboxylic acid, an inorganic acid, and water. 4,4'-oxydiphthalonitrile obtained by heating 4-nitrophthalonitrile in a solvent in the presence of an alkali metal salt is preferably provided for hydrolysis.
Inventors:
FUJIBAYASHI RYOICHI (JP)
ONUMA FUMIO (JP)
ONUMA FUMIO (JP)
Application Number:
PCT/JP2012/057040
Publication Date:
September 26, 2013
Filing Date:
March 19, 2012
Export Citation:
Assignee:
AIR WATER INC (JP)
FUJIBAYASHI RYOICHI (JP)
ONUMA FUMIO (JP)
FUJIBAYASHI RYOICHI (JP)
ONUMA FUMIO (JP)
International Classes:
C07C51/08; C07C65/24; C07D307/89
Foreign References:
| JP2011195466A | 2011-10-06 | |||
| JP2002332253A | 2002-11-22 | |||
| JP2002097186A | 2002-04-02 | |||
| SU636228A1 | 1978-12-05 |
Other References:
PLAKHTINSKII V.V. ET AL.: "Kinetics of 4-nitrophthalonitrile reaction with alkali metal carbonates in various solvents", KINETIKA I KATALIZ, vol. 34, no. 6, 1993, pages 993 - 996
WOHRLE D. ET AL.: "Reaction of 4-nitrophthalonitrile with carbonate, nitrite, and fluoride", SYNTHETIC COMMUNICATIONS, vol. 19, no. 18, 1989, pages 3231 - 3239
WOHRLE D. ET AL.: "Reaction of 4-nitrophthalonitrile with carbonate, nitrite, and fluoride", SYNTHETIC COMMUNICATIONS, vol. 19, no. 18, 1989, pages 3231 - 3239
Attorney, Agent or Firm:
HAYAKAWA, Yuzi et al. (JP)
Yuji Hayakawa (JP)
Yuji Hayakawa (JP)
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