Compositions – Leather or fur treating
Patent
1979-12-03
1981-11-10
Guynn, Herbert B.
Compositions
Leather or fur treating
166252, 166275, E21B 4322
Patent
active
042997119
ABSTRACT:
Disclosed is an improved surfactant waterflooding enhanced oil recovery process employing a fluid containing as substantial in the only anionic surfactant, an ethoxylated and sulfated or ethoxylated and sulfonated surfactant. The degree of ethoxylation of the surfactant is determined by determining the degree of ethoxylation which produces the first inflection point in the electrical conductivity of a fluid as the degree of ethoxylation is increased from a value below that which causes solubility of the fluid in the aqueous environment in which it is tested to a value slightly greater than borderline solubility. Optimum results are obtained if the average degree of ethoxylation of the ethoxylated and sulfated or ethoxylated and sulfonated surfactant is from n-0.2 to n+0.1 and preferably from n-0.15 to n+0.05, where n is the degree of ethoxylation corresponding to the first inflection point in electrical conductivity.
REFERENCES:
patent: 3500923 (1970-03-01), Reisberg
patent: 3827497 (1974-08-01), Dycus et al.
patent: 4018278 (1977-04-01), Shupe
patent: 4066124 (1978-01-01), Carlin et al.
patent: 4077471 (1978-03-01), Shupe et al.
patent: 4088189 (1978-05-01), Shupe
patent: 4110228 (1978-08-01), Tyler et al.
Park Jack H.
Tyler Timothy N.
Guynn Herbert B.
Kulason Robert A.
Park Jack H.
Ries Carl G.
Texaco Inc.
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