Crosslinking water soluble polymers with iron to form gels for use in subterranean profile modification
US5065822A · kind A · utility
22Cited by
7References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 14, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Sep 14, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/512
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process of profile modifying permeable soils with an environmentally safe composition of a non-toxic water-soluble polymer, a redox couple of a water-soluble ferrous salt and a non-toxic, oxidizing agent which are mixed in water and pumped into a subterranean formation wherein ferrous ion is oxidized to ferric ion to gel the polymer making the subterranean formation impermeable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.