Separating oil emulsions
US4655927A · kind A · utility
27Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1985 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Jul 8, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Water is separated from an oil emulsion containing a surface active agent by passing the emulsion through a polymeric porous membrane cross-flow ultra-filter. Either the oil emulsion feedstock or the membrane is treated with a hydrophilic colloid so that the effective pore size of the composite membrane so formed by the colloid will be reduced as the surface tension falls in the presence of the surface active agent in the oil emulsion. The hydrophilic colloid is selected according to the chemical ionic classification of the surface active agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.