Methods of preparing novel halide anion free quaternary ammonium salt monomers, polymerization methods therefor, and methods of use of the resulting polymers
US8858803B2 · kind B2 · utility
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Key dates
| Filing date | Nov 22, 2010 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Jan 4, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C213/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methods are provided for making halide-free quaternary ammonium salt monomers. Polymers prepared from the monomers and methods of using the polymers to clarify raw, untreated water or wastewater are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.