Compositions – Leather or fur treating
Patent
1982-09-07
1987-10-20
Terapane, John F.
Compositions
Leather or fur treating
252 8515, 252312, 252330, 252344, 166266, 166267, 166274, C09K 700, B01J 1300
Patent
active
047012714
ABSTRACT:
When sulfonated surfactants are used to displace crude oil from a subterranean formation, the produced oil and water contain the surfactant and form a tight emulsion. This crude oil-water-surfactant emulsion is broken with a strong inorganic acid, for example, hydrochloric acid. The amount of acid added is sufficient to lower the pH of the water in the emulsion to 3.0 or lower. Thereafter, the oil is separated from the emulsion by conventional techniques.
REFERENCES:
patent: 3107726 (1963-10-01), Greenwald
patent: 3108059 (1963-10-01), Greenwald
patent: 4058453 (1977-11-01), Patel et al.
patent: 4147638 (1979-04-01), Plummer
patent: 4177207 (1979-12-01), Nussbaum et al.
patent: 4374734 (1983-02-01), Newcombe
Kirk-Othmer, Encyclopedia of Chemical Technology, Third Edition, vol. 22, pp. 349-353, (1983).
Giordano Ronald M.
Meyers Kevin O.
Salter Stephen J.
Thach Sophany
Atlantic Richfield Company
Folzenlogen M. David
Kilby Catherine S.
Martin Michael E.
Terapane John F.
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