发明名称 |
Process for producing carboxypolysaccharide |
摘要 |
In a process of producing a carboxypolysaccharide by oxidizing a polysaccharide in the presence of a ruthenium compound and an oxidizing agent, the expensive ruthenium is easily and efficiently recovered. Ruthenium dissolved in a reaction mixture after the oxidation of the polysaccharide is converted, after or without being subjected to a heat. treatment, to high oxidation sate, which is then recovered by the extraction with a water-insoluble organic solvent. The recovered ruthenium is reduced to low oxidation state and reused in a subsequent production of the carboxypolysaccharide.
|
申请公布号 |
US6111097(A) |
申请公布日期 |
2000.08.29 |
申请号 |
US19990325878 |
申请日期 |
1999.06.04 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
NAGASHIMA, HIROMITSU;SAKAITANI, HISASHI;WAKABAYASHI, HIDECHIKA;KOZAKI, TOSHIAKI |
分类号 |
C08B15/04;C08B31/18;(IPC1-7):C08B37/02 |
主分类号 |
C08B15/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|