Method for improving calcium ion tolerance of hydrocarbon polyme

Details Method for improving calcium ion tolerance of hydrocarbon polyme Method for improving calcium ion tolerance of hydrocarbon polyme

1976-06-25

1978-05-16

Guynn, Herbert B.

Compositions

Leather or fur treating

166275, 260513R, E21B 4322

Patent

active

040897885

ABSTRACT:
A method for increasing the tolerance of hydrocarbon polymer sulfonate surfactant materials to divalent ions especially calcium when such materials are injected into subterranean formations containing high divalent cation contents which comprises contacting the hydrocarbon polymer sulfonate surfactant with an oxidizing agent at oxidizing conditions. The specific hydrocarbon polymer sulfonate surfactants disclosed are those produced from lower aliphatic olefins such as isobutylene, butene-1, butene-2 or propylene or other similar olefinic materials which have been polymerized to average equivalent molecular weights of from about 350 to 675 or higher. The preferred oxidizing agent is hydrogen peroxide.

REFERENCES:
patent: 2653970 (1953-09-01), Fessler
patent: 3424693 (1969-01-01), Stein et al.
patent: 3428654 (1969-02-01), Rubinfeld et al.
patent: 3535339 (1970-10-01), Beyer et al.
patent: 3644499 (1972-02-01), Murphy et al.
patent: 3714062 (1973-01-01), Askew et al.
patent: 3954849 (1976-05-01), Karll et al.

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