Surface-active compounds of the sulfobetaines family, their manufacture and use, particularly for enhanced oil recovery
US4704229A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 20, 1985 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Aug 20, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/912
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New surface-active compounds of the sulfobetaines group are manufactured. They comply with the general formula: ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 is substantially a hydrocarbon radical, each of R.sub.4 and R.sub.5 is a hydrogen atom or substantially a hydrocarbon radical and R.sub.6 is a hydrogen atom or a hydrocarbon radical, R.sub.1 to R.sub.6 radicals containing together from 12 to 30 carbon atoms, n is an integer equal to 2 to 3, Z may be a CH.sub.3 radical or a hydroxy group, p may be 0 or 1 with, when Z is a hydroxy group and p is equal to 1, a value of 1 for m and for q; when Z is a methyl radical, with a value of 1 for p, a value of 2 for m and a value of 0 or 1 for q and, when p=0, a value of 2, 3 or 4 for the sum (m+q). These new surfactants are useful in enhanced oil recovery as micellar systems consisting of aqueous solutions and microemulsions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.