Compositions – Leather or fur treating
Patent
1989-02-14
1990-04-17
Terapane, John F.
Compositions
Leather or fur treating
166274, 252 8551, 252342, E21B 4322
Patent
active
049178083
ABSTRACT:
Oil is recovered from a subsurface reservoir by surfactants. Surfactant flooding is accomplished especially in reservoirs with marked temperature fluctuations or a temperature gradient which are normally problematic since a soluble surfactant effective for oil mobilization does not retain these properties over wide temperature ranges of, e.g., 10.degree. to 100.degree. C. The new process provides a good surfactant effectiveness even at such extreme temporary and/or local temperature fluctuations. A mixture of a carboxymethylated oxethylate and a polyglucosyl sorbitol fatty acid ester is used. The polyglucosyl sorbitols used as fatty acid esters are those with 2 to 20 glucose units. Recovery of oil by such surfactant flooding is useful above all in reservoirs with temporary or local temperature changes.
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patent: 4427564 (1984-01-01), Brownawell et al.
patent: 4457373 (1984-07-01), Balzer et al.
patent: 4528106 (1985-07-01), Grolitzer
patent: 4582138 (1986-04-01), Balzer
patent: 4705110 (1987-11-01), Balzer
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patent: 4825951 (1989-05-01), Balzer
Huels Aktiengesellschaft
Sayala Chhaya
Terapane John F.
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