Breaking middle phase emulsions
US4623447A · kind A · utility
10Cited by
36References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1985 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Aug 2, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G33/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Middle phase emulsions are broken by subjecting the emulsion to a first atmospheric distillation step to remove water, followed by a second vacuum distillation step to recover oil. The residue contains the surfactant. The atmospheric distillation is generally carried out by steam distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.