Use of ammonium chloride solutions to remove sulfonate surfactants from crude oil
US4765910A · kind A · utility
10Cited by
11References
4Claims
0Family size
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Key dates
| Filing date | Apr 18, 1986 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Apr 18, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D17/047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Sulfonate surfactants are removed from crude oil or crude oil emulsions, such as may be produced using enhanced recovery methods, by mixing with an aqueous solution of synthetic brine such as ammonium chloride, allowing the phases to separate, and removing the aqueous phase containing brine and sulfonates from the organic phase containing hydrocarbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.