Process for the treatment of an aqueous medium polluted with hydrocarbons and a de-emulsifying and dispersing composition based on polyglycerol esters
US5744046A · kind A · utility
4Cited by
9References
15Claims
0Family size
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Key dates
| Filing date | Jan 21, 1997 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Jan 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/925
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is described for the treatment of an aqueous medium which has been polluted with hydrocarbon compounds, termed crude oil, and a demulsifying and dispersing composition. The crude oil is brought into contact with a solution of a mixture of polyglycerol esters in a proportion of at least 50 ppm by weight in order to inhibit formation of a water-in crude oil emulsion or to partially break the emulsion if it has already formed. The polyglycerol esters can be combined with a surfactant, preferably an anionic surfactant, such as a sodium alkylsulphosuccinate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.