Title:
【発明の名称】多糖からポリカルボキシレートを製造する改善された酸化方法
Document Type and Number:
Japanese Patent JPH11502247
Kind Code:
A
Abstract:
PCT No. PCT/EP96/01065 Sec. 371 Date Dec. 29, 1997 Sec. 102(e) Date Dec. 29, 1997 PCT Filed Mar. 13, 1996 PCT Pub. No. WO96/29351 PCT Pub. Date Sep. 26, 1996A process for producing polycarboxylic acids or salts thereof by contacting a polysaccharide with nitrogen dioxide and dinitrogen tetroxide at a charging temperature in the range from the boiling point of nitrogen dioxide under a particular pressure to a temperature which is 50 DEG C. higher than said boiling point, oxidizing the primary alcohol groups of the polysaccharide at a temperature which is at least about 10 DEG C. above said charging temperature to convert the primary alcohol groups into carboxyl groups, and optionally, at least partially neutralizing the carboxylic acid groups formed.
Inventors:
Meller, thomas
Engelskirchen, Konrad
Fischer, Herbert
Noack, Wolf-Eckart
Engelskirchen, Konrad
Fischer, Herbert
Noack, Wolf-Eckart
Application Number:
JP52804796A
Publication Date:
February 23, 1999
Filing Date:
March 13, 1996
Export Citation:
Assignee:
HENKEL KOMMANDITGESELLSCHAFT AUF AKTIEN
International Classes:
C08B15/04; C08B31/18; C08B37/00; C11D3/22; C11D3/37; (IPC1-7): C08B31/18; C08B15/04; C08B37/00
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)