Enhanced oil recovery through cyclic injection of fluorochemicals
US4921619A · kind A · utility
29Cited by
13References
31Claims
0Family size
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Key dates
| Filing date | Apr 12, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Apr 12, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oil recovery process comprising contacting an oil deposit with a blend of chemicals containing a fluorochemical of the formula EQU [(R.sub.f).sub.n (R').sub.p ].sub.m Z (I) wherein each R.sub.f is independently a perfluoroaliphatic or omega-hydroperfluoroaliphatic group each of which is optionally interrupted by carbonyl, carboxy, carbonylamino, oxygen, sulfur, sulfinyl, or sulfonyl; n is 1-3 and p is 0 or 1 provided what when p is 0, n is 1; m is 1-5000; each R' is independently an organic linking group between R.sub.f and Z having a valency of n+1; and Z is a hydrocarbyl containing residue of valency m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.