Back to results
US 7,018,957 B2Granted
Method of using high molecular weight demulsifiers
AssigneeBJ Services Company
InventorHarold Becker
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBJ Services Company
InventorHarold Becker
Estimating the term…
Homopolymers and copolymers of an esterified reaction product of an epoxidized mono-hydroxyl alcohol and a free radical polymerizable monomer are highly effective demulsifying agents. The molecular weight of the polymer is between from about 10,000 to about 500,000. The epoxidized mono-hydroxyl alcohol is preferably a reaction product of a C6–C30 linear or branched alcohol and an alkylene oxide. The alkylene oxide is preferably either ethylene oxide, propylene oxide or butylenes oxide or a mixture thereof. The free radical polymerizable monomer is preferably a vinyl aromatic compound or an acrylic or methacrylic based monomer. The polymer preferably comprises a micellar assembly. Such polymers are highly effective in demulsifying crude oils having API gravities of from 8 to 28 or a crude oil having a viscosity between from about 3 to about 10,000 CPS @ at 25° C.
A method of demulsifying a petroleum water-in-oil emulsion wherein the petroleum is a crude oil having an API gravity of from 8 to 28 which comprises:
A method of demulsifying a crude oil having a viscosity between from about 3 to about 100 CPS @ 25° C. which comprises introducing to the crude oil a demulsifying effective amount of a homo- or copolymer of an esterified reaction product of:
A method of demulsifying a petroleum water-in-oil emulsion of a crude oil which comprises adding to the emulsion a demulsifying effective amount of a micellar assembly consisting essentially of a homo- or copolymer of an esterified reaction product comprising an epoxidized mono-hydroxyl alcohol and a free radical polymerizable monomer.
A method of demulsifying a petroleum water-in-oil emulsion which comprises:
Dependencies are inferred from the claim text.