Title:
METHOD FOR PRODUCING FLUORINE-CONTAINING BENZOIC ACID
Document Type and Number:
Japanese Patent JP3816367
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an industrially profitable method for producing a fluorine- containing benzoic acid, which prevents adhesion of fluorine-containing benzoic acid precipitates to inner walls of the reaction vessel during hydrolysis of the fluorine-containing aromatic compound, and which collects the fluorine-containing benzoic acid from the reaction solution with high filtration efficiency, significantly reducing contents of the reaction solution and an ammonium sulfate.
SOLUTION: During cooling process of the reaction solution to precipitate the fluorine-containing benzoic acid, water is added to the reaction solution under stirring condition until acid substance concentration becomes 10 to 50 wt.%.
Inventors:
Hirota Hiroyasu
Application Number:
JP2001296686A
Publication Date:
August 30, 2006
Filing Date:
September 27, 2001
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
C07C51/06; C07B61/00; C07C51/08; C07C63/70; (IPC1-7): C07C51/06; C07C51/08; C07C63/70; //C07B61/00
Domestic Patent References:
| JP10109947A | ||||
| JP11060508A |
Attorney, Agent or Firm:
Yasuo Yasutomi
Takanori Tamai
Takanori Tamai