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use of imidazolin abgeleiter amphoacetate surfactants of high purity as foaming in olbohrungen
use of imidazolin abgeleiter amphoacetate surfactants of high purity as foaming in olbohrungen
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机译:咪唑啉合成的两性两性乙酸酯表面活性剂在奥尔布伦根中的起泡作用
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摘要
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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