Compositions – Leather or fur treating
Patent
1990-03-07
1991-05-07
Stoll, Robert L.
Compositions
Leather or fur treating
252 8551, 252 83, 252312, 137 13, E21B 4325
Patent
active
050134620
ABSTRACT:
This invention concerns methods for improving the mobility and pipeline transport of a viscous crude oil and the productivity of viscous crude oil producing wells by forming an oil-in-water emulsion with said oil and from 20 to 80% by weight of water in the presence of 100 to 1500 parts by weight of a surfactant blend per million parts by weight of said emulsion, said blend comprising from 15 to 85 parts by weight of an anionic or amphoteric surfactant (A) selected from those of the formula Ar(OCH.sub.2 CH.sub.2).sub.n OSO.sub.3 H, ##STR1## a sodium and ammonium salt thereof, and from 85 to 15 parts by weight of a nonionic surfactant selected from (B) of the formulae Ar(OCH.sub.2 CH.sub.2).sub.p OH or (C) of the formula ##STR2## the latter having an HLB value of from 10 to 20; where Ar is octylphenyl or nonylphenyl,
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McCutheon's Detergents and Emulsifiers, 1973 North American Edition, p. 51.
Benson Gregg C.
Geist Gary L.
Lumb J. Trevor
Pfizer Inc.
Richardson Peter C.
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