Polymer flood filtration improvement
US4212748A · kind A · utility
9Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1978 |
| Grant date | Jul 15, 1980 |
| Priority date | — |
| Expiry date | May 26, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Filterability of aqueous solutions of polymers employed to thicken waterfloods such as biopolymers (e.g. heteropolysaccharides) is improved by addition of a surfactant (e.g. a sulfated alkoxylated alcohol). Filterability is further enhanced by addition of an ethoxylated alcohol surfactant and/or an alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.