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Styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer as well as preparation method and application thereof

The technology of acid anhydride alkylphenol polyoxyethylene ether and alkylphenol polyoxyethylene ether is applied in the field of styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer and its preparation, and can solve the problem of high application cost and mixed use. The problems of large water volume and complex process can achieve the effect of easy industrial production, reducing the viscosity of heavy oil and simple steps.

Active Publication Date: 2017-11-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the thinner viscosity reduction technology is complex in process, greatly affected by thin oil resources, and will affect the oil products of thin oil; the heating viscosity reduction technology has problems such as large energy consumption and high application cost; the amount of water mixed in the emulsification viscosity reduction process is large, Severe environmental pollution and complicated post-processing of crude oil
[0004] The use of chemical additives to reduce the viscosity of heavy oil and improve its fluidity has attracted more and more attention from the petroleum industry. The dosage is generally 0.1wt% to 5wt% of heavy oil. This method is easy to operate and saves energy. It is considered the most promising method. Viscosity reduction method, but the viscosity reduction effect of the current chemical viscosity reducer is not good

Method used

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  • Styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer as well as preparation method and application thereof
  • Styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer as well as preparation method and application thereof
  • Styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer as well as preparation method and application thereof

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preparation example Construction

[0034] The present invention provides a preparation method of the styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer according to the above scheme, which includes the following steps:

[0035] Under the action of a catalyst, the styrene-maleic anhydride copolymer and alkylphenol polyoxyethylene ether are esterified in a polar aprotic solvent to obtain styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer Things.

[0036] In the present invention, the styrene-maleic anhydride copolymer is preferably obtained by a method including the following preparation steps:

[0037] Under the protection of inert gas and the effect of initiator, styrene and maleic anhydride are polymerized in a solvent to obtain styrene-maleic anhydride copolymer.

[0038] In the present invention, the molar ratio of styrene and maleic anhydride is preferably 1 to 999:1 to 999, more preferably 5 to 800:5 to 800, and most preferably 20 to 600:20 to 600; The initiator is preferably a...

Embodiment 1

[0069] Accurately weigh 1 mol of styrene and 0.5 mol of maleic anhydride, add maleic anhydride and toluene (the mass ratio of toluene to maleic anhydride is 10:1) into the reactor, heat and stir to dissolve at 55°C, pass in N 2 After 15 minutes, add dropwise toluene-dissolved benzoyl peroxide (the mass of benzoyl peroxide is 1% of the total mass of styrene and maleic anhydride) and styrene. 2 Slowly increase the temperature under protection (heating rate 3°C / min), the reaction is carried out under stirring, the reaction temperature is controlled at 75°C, and the polymerization inhibitor hydroquinone is added after the constant temperature reaction for 4 hours to complete the reaction. 2 Cooled to room temperature under the atmosphere, the reaction solution was added dropwise to methanol for precipitation, vacuum filtration, and then the white precipitate was vacuum dried at 50° C. for 4 hours to obtain a white powdery product, which is a styrene-maleic anhydride copolymer.

[0070] ...

Embodiment 2

[0075] Accurately weigh 1 mol of styrene and 1 mol of maleic anhydride, add maleic anhydride and toluene (the mass ratio of toluene to maleic anhydride is 10:1) into the reactor, heat and stir to dissolve at 60°C, and pass in N 2 After 20 minutes, add dropwise azobisisobutyronitrile dissolved in toluene (the mass of azobisisobutyronitrile is 1% of the total mass of styrene and maleic anhydride) and styrene, in N 2 Slowly increase the temperature under protection (heating rate 3°C / min), the reaction is carried out under stirring, the reaction temperature is controlled at 50°C, and the polymerization inhibitor p-benzoquinone is added to complete the reaction after 7 hours of constant temperature reaction 2 After cooling to room temperature under atmosphere, the reaction solution was added dropwise to methanol for precipitation, vacuum filtration, and then the white precipitate was vacuum dried at 55° C. for 5 hours to obtain a white powdery product, which is a styrene-maleic anhydrid...

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Abstract

The invention provides styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer which has a structure shown as a formula I. The copolymer disclosed by the invention has better compatibility with high-colloid asphalt, can be used as a high-colloid asphaltene heavy oil viscosity reducer, has effects of dispersing asphaltene and enhancing colloid stable asphaltene, can effectively reduce heavy oil viscosity and has higher viscosity reduction rate. In an application process, the copolymer can be directly added into heavy oil, has convenience in application and low cost and further has no effect on oil quality. Embodiment results show that the styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer disclosed by the invention can be utilized as the viscosity reducer to be applied into the heavy oil; when an adding amount is 0.4% of the mass of the heavy oil, the viscosity reduction rate at 50 DEG C can reach 76% or more.

Description

Technical field [0001] The invention relates to the technical field of viscosity reducers, in particular to a styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer and a preparation method and application thereof. Background technique [0002] In the heavy oil polydisperse colloid stabilization system, the asphaltenes can be stably suspended in the heavy oil, which mainly depends on the solvation and dispersion of the colloid. In the process of heavy oil production and transportation, as the temperature and pressure change, the heavy oil system Asphaltenes accumulate and precipitate each other and wrap the liquid crude oil, increasing the viscosity of the crude oil. High-colloid asphaltene heavy oil has outstanding characteristics such as high viscosity, high density and poor fluidity, which severely restrict its exploitation, pipeline transportation and industrial applications. [0003] For high colloidal asphaltene heavy oil, the traditional viscosity reduction te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C09K8/588F17D1/16
CPCC08G81/025C09K8/588F17D1/16
Inventor 宋林花吴信朋阎艺轩赵晓东姜翠玉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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