Method for producing polyoxyalkylene alkyl ether carboxylic acid and salt thereof
US8940933B2 · kind B2 · utility
0Cited by
8References
16Claims
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Key dates
| Filing date | Dec 22, 2010 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Oct 14, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/235
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a method for producing polyoxyalkylene alkyl ether carboxylic acid and a salt thereof, including supplying polyoxyalkylene alkyl ether, oxygen, and water to a continuous stirred tank reactor containing a noble metal catalyst to oxidize the polyoxyalkylene alkyl ether with oxygen, in which the molar ratio of the salt of polyoxyalkylene alkyl ether carboxylic acid to the polyoxyalkylene alkyl ether in the continuous stirred tank reactor is controlled to 0.33 to 49.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.