Divalent ion tolerant aromatic sulfonates
US4894173A · kind A · utility
2Cited by
41References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/937
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Divalent ion tolerant aromatic sulfonate suitable for enhanced oil recovery characterized by the formula: ##STR1## where x=0 to 4 PA0 R'=H or Ch.sub.3 PA0 R=CH.sub.3 (CH.sub.2)y and y=1 to 15. Preferably, the composition comprises of second compound characterized by the formula ##STR2## wherein R, x, y, and R' are the same as defined in claim 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.