Purification of secondary recovery waterflood liquids
US4502959A · kind A · utility
8Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1983 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Jul 5, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Polysaccharide gums, such as guar gum, are removed from an aqueous liquid by agglomerating the gum with a low molecular weight, water-soluble copolymer of styrene and maleic anhydride and separating the agglomerate from the aqueous liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.