Aryl alkyl alcohol polyoxyethylene ether carboxylate and preparation and application thereof

Abstract

The invention relates to aryl alkyl alcohol polyoxyethylene ether carboxylate and preparation and application thereof. The structural formula of the aryl alkyl alcohol polyoxyethylene ether carboxylate is shown in a formula (I) in the specification, wherein R is phenyl, tolyl or xylyl; x and y are integers selected from 0 to 15, and x plus y is 15; n is an integer selected from 1 to 15; M is Na or K. A preparation method of the aryl alkyl alcohol polyoxyethylene ether carboxylate comprises the step that aryl alkyl alcohol polyoxyethylene ether reacts with haloacetic acid in the presence of a strong-base catalyst to generate aryl alkyl alcohol polyoxyethylene ether carboxylate. The carboxylate has favorable water solubility, efficient surface/interfacial tension reduction capability, an excellent emulsifying property, better temperature resistance and salt tolerance, and favorable adsorption resistance and oil displacement efficiency, has a good application prospect in tertiary oil recovery in numerous fields, and can be applied as an effective oil displacement agent to tertiary oil recovery.

Description

technical field [0001] The invention belongs to the field of high-efficiency surfactants, in particular to aryl alkyl alcohol polyoxyethylene ether carboxylate and its preparation and application. Background technique [0002] In oilfield production technology, chemical composite flooding refers to adding polymer, surfactant and alkali to water to exert the synergistic effect between the components, and to utilize the mobility control ability and viscoelastic effect of the polymer and the large-scale effect of the surfactant. It is a tertiary oil recovery technology that reduces the oil-water interfacial tension, improves the sweep coefficient and improves the oil displacement efficiency, and then improves the recovery factor. [0003] Polymer / surfactant (SP) binary flooding is another new technology for enhanced oil recovery developed on the basis of polymer flooding and ASP flooding. The active agent can reduce the capillary pressure and increase the capillary number, so ...

AI Technical Summary

Problems solved by technology

CN102807478 A discloses an aryl alkyl alcohol polyoxyethylene ether compound, wherein the oil-water interfacial tension of EB5EO can reach 10 -2 mN/m, other surfactants have oil-water interfacial tension of 10 -1 About

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