Treatment of surfactant laden wastewater
US8518267B2 · kind B2 · utility
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18References
5Claims
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Key dates
| Filing date | Dec 15, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Dec 15, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F251/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Clarification of surfactant laden wastewaters of the type commonly encountered in the laundry, dishwashing, textile manufacturing, and metal cleaning and degreasing processes is provided by use of a chitosan/(meth)acrylyloxy alkyl quaternary ammonium salt graft polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.