Use of high purity imidazoline based amphoacetate surfactant as

Details Use of high purity imidazoline based amphoacetate surfactant as Use of high purity imidazoline based amphoacetate surfactant as

1995-05-22

1997-03-25

Tucker, Philip

Earth boring, well treating, and oil field chemistry

Well treating

Contains intended gaseous phase at entry into wellbore

507102, 507131, 507244, C09K 700

Patent

active

056144733

ABSTRACT:
Increased foam quality and resistance to hydrocarbon defoaming for foams used in well boring and stimulation processes as well as secondary and tertiary oil recovery is obtained using imidazoline-based amphoacetates of higher purity, containing essentially negligible amounts of unalkylated amido amines, lower amounts of glycolic acid salts and monochloroacetate salts.
The higher purity amphoacetates can be obtained via processes utilizing precise pH control during the reaction of imidazoline, or its open-chain derivatives, with alkylating agents, e.g. sodium monochloroacetate. These higher-purity amphoacetates contain essentially fully alkylated products and lower amounts of glycolic acid derivatives, even though a ratio of monohaloalkylate to substituted imidazoline, or its open-ring derivative, of less than 1.5:1.0 and close to 1.0:1.0 is used.

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