Title:
２，５−ジヒドロキシテレフタル酸の製造方法
Document Type and Number:
Japanese Patent JP5762327
Kind Code:
B2
Abstract:
The present invention provides a process for preparing 2,5-dihydroxyterephthalic acid which comprises reacting a dialkali metal salt of hydroquinone with carbon dioxide in a reaction medium in the presence of a potassium salt represented by formula (I):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ C n H 2n+1 COOK€ƒ€ƒ€ƒ€ƒ€ƒ(I)
wherein n is an integer of 1-17. According to the process for preparing 2,5-dihydroxyterephthalic acid of the present invention, 2,5-dihydroxyterephthalic acid can be produced both safely and at a low cost under industrially advantageous conditions. Further, the process according to the present invention causes less damage to reaction equipment and the like.
Inventors:
Yusuke Kida
Ryoichi Otsuka
Ryoichi Otsuka
Application Number:
JP2012022050A
Publication Date:
August 12, 2015
Filing Date:
February 03, 2012
Export Citation:
Assignee:
Ueno Pharmaceutical Co., Ltd.
International Classes:
C07C51/15; C07C65/05
Domestic Patent References:
| JP45000332B1 | ||||
| JP2011026232A | ||||
| JP11515031A | ||||
| JP49011841A | ||||
| JP49011843A | ||||
| JP2006160624A |
Foreign References:
| US3448145 |
Attorney, Agent or Firm:
Mitsuo Tanaka
Hiroshi Yamazaki
Michiko Matsutani
Kenji Tomita
Hiroshi Yamazaki
Michiko Matsutani
Kenji Tomita