De-emulsification of oils
US4888107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Jan 28, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G33/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The specification describes and claims a method for the de-emulsification of emulsions of water and crude oil which comprises treating the emulsion with an organosiloxane, a siloxane unit having a quaternary ammonium group R'N.sup.+ (R.sup.2).sub.3 X.sup.- linked to its silicon atom, R' represents a divalent hydrocarbon group linking the silicon and nitrogen atoms, each R.sup.2 represents an alkyl group having up to 20 carbon atoms or a polyoxyalkylene chain having 3 to 50 oxyalkylene groups, and X.sup.- represents a halogen ion. Examples of organosiloxanes given include those composed exclusively of the said units, and copolymers composed of these siloxane units and siloxane units according to the general formula R.sub.b (SiO.sub.4-b)/2 in which each R is a substituted or unsubstituted hydrocarbon group of up to 10 carbon atoms, and b has the value 0. 1, 2 or 3, for example those according to the average general formula EQU R.sub.3 SiO(R.sub.2 SiO).sub.x (RZSiO).sub.y SiR.sub.3 (iv) in which x has a value in the range 1 to 150, y has a value in the range 1 to 10 and the ratio of (X+y)/y lies in the range 2 to 25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.