Oil emulsion processing
US4002562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Sep 18, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11B11/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for processing an oil-water emulsion to remove oily material therefrom comprising forming a mixture of the oil-water emulsion with liquid amine, in which oils of the emulsion are soluble and having an inverse critical solution point with water, at a temperature below the phase separation temperature of the amine and water so as to form a single liquid phase of amine, oil and water, separating said single liquid phase from any solids which may be contained in the emulsion, raising the temperature of the resulting single liquid phase above the critical solution temperature to effect liquid phase separation whereby an amine phase containing substantially all of the oily material of the emulsion and a water phase containing substantially no oily material are formed, and then separating the two liquid phases. The amine phase is readily processed to recover oily matter therefrom and may be recycled for the processing of additional oil emulsion. The filtration of solids from the single phase mixture is improved by addition of lime and/or filter aids. The method is applicable to a wide range of oil-water emulsions, including oil-in-water and water-in-oil emulsions, and finds parti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.