Process for the flocculation of suspended solids
US4342653A · kind A · utility
51Cited by
1References
6Claims
0Family size
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Key dates
| Filing date | Dec 16, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Dec 16, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Aqueous dispersions of solids are readily flocculated with polymeric anionic flocculants containing comonomers of 2-acrylamido-2-methylpropanesulfonic acid and acrylamide. The polymeric flocculant should contain from about 1.0 to about 35.0 mole percent of repeating units derived from 2-acrylamido-2-methylpropanesulfonic acid and should have a Brookfield viscosity of at least 2.0 centipoises. In addition to their flocculating ability, employment of these copolymers achieves a high degree of compaction in the flocculated solids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.