Petrochina Company Limited

Yongcan Peng

Bo Huang

Pingmei Wang

Jianhui Luo

Bin Ding

Xiangfei Geng

Baoliang Peng

Jianyong Xie

A nonionic Gemini surfactant, (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether has a structural formula of: and is prepared by a two-step reaction: S1, diphenyl ether 4,4'-dicarboxylic acid is subjected to an acyl chlorination reaction to obtain diphenyl ether 4,4&#x2032;-dicarbonyl dichloride; S2, diphenyl ether 4,4&#x2032;-dicarbonyl dichloride is subjected to an esterification reaction with octylphenol polyoxyethylene ether (OP-10) to obtain the target product (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether. The surfactant is expected to be applied in tertiary oil recovery as an alkali/surfactant, in polymer/surfactant binary composite flooding, in alkali/surfactant/polymer ternary composite flooding, as a microemulsion emulsifier and the like, and it can also be compounded with a common surfactant to reduce the use cost, and thus create conditions for its large-scale application.

Nonionic Gemini surfactant of (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether and its synthesis method

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Yongcan Peng