Method for cleavage of ether-linkages in polyethoxylates
US7527964B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Jun 22, 2004 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | May 6, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/874
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A method for cleavage of the ether-linkage of polyethoxylates is described. A novel pure microbial culture, Pseudomonas nitroreducens TX1 (Depository No.: BCRC910228), is used under aerobic condition to cleave the ether-linkage adjacent to the carboxylated terminus or ethoxyl terminus. This method is useful to cleave sequentially ether-linkage of polyethoxylates in an aqueous buffer solution with an initial concentration of the polyethoxylates between 0.05% and 20%. This method is also effective for the cleavage of the ether-linkages in short-chain polyethoxylates with one to three ethoxyl units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.