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Crude oil pour-point depressant and preparation method thereof

A crude oil pour point depressant and solvent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as insurmountable influence

Inactive Publication Date: 2014-10-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unable to overcome the influence of strong polar groups contained in colloids and asphaltenes in crude oil on crude oil modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) First synthesize polystyrene maleic anhydride:

[0018] Add 4.9g of maleic anhydride and 0.1g of benzoyl peroxide (BPO) into 75ml of toluene solvent, add 5.2g of styrene after fully dissolved, raise the temperature to 50°C under the protection of nitrogen, stir for 15min to make the maleic anhydride completely Dissolve, then heat up to 80°C and react for 1 hour to obtain polystyrene maleic anhydride, a milky white paste product. The reactant is cooled to room temperature, and the product is filtered out, and dried in vacuum at 60°C;

[0019] (2) Esterification of polystyrene maleic anhydride:

[0020] Add 3.06g of polystyrene maleic anhydride and 0.2g of p-toluenesulfonic acid into 70ml of toluene, fully dissolve, add n-octanol, stir and heat, condense and reflux for 6h, and after cooling, a light yellow jelly-like substance is obtained; n-octanol and The molar ratio of maleic anhydride is 1:1;

[0021] (3) Preparation of crude oil pour point depressant: 100% by w...

Embodiment 2

[0024] (1) First synthesize polystyrene maleic anhydride:

[0025] Add 4.9g of maleic anhydride and 0.1g of benzoyl peroxide (BPO) into 75ml of toluene solvent, add 5.2g of styrene after fully dissolved, raise the temperature to 50°C under the protection of nitrogen, stir for 15min to make the maleic anhydride completely Dissolve, then raise the temperature to 80°C-85°C and react for 1 hour to obtain a milky white paste product polystyrene maleic anhydride, the reactant is cooled to room temperature, the product is filtered out, and vacuum-dried at 60°C;

[0026] (2) Esterification of polystyrene maleic anhydride:

[0027] Add 3.06g of polystyrene maleic anhydride and 0.2g of p-toluenesulfonic acid into 70ml of toluene, fully dissolve, add C20 alcohol, stir and heat, condense and reflux for 6h, and obtain a light yellow jelly substance after cooling; C20 alcohol and polyphenylene The molar ratio of ethylene maleic anhydride is 1:1;

[0028] (3) Preparation of crude oil pour ...

Embodiment 3

[0031] (1) First synthesize polystyrene maleic anhydride:

[0032] Add 4.9g of maleic anhydride and 0.1g of benzoyl peroxide (BPO) into 75ml of toluene solvent, add 5.2g of styrene after fully dissolved, raise the temperature to 50°C under the protection of nitrogen, stir for 15min to make the maleic anhydride completely Dissolve, then heat up to 85°C and react for 1 hour to obtain polystyrene maleic anhydride, a milky white paste product. The reactant is cooled to room temperature, the product is filtered out, and vacuum-dried at 60°C;

[0033] (2) Esterification of polystyrene maleic anhydride:

[0034] Add 3.06g of polystyrene maleic anhydride and 0.2g of p-toluenesulfonic acid into 70ml of toluene. After fully dissolving, add the mixture of C18 alcohol, C20 alcohol and C24 alcohol, stir and heat, condense and reflux for 6 hours. After cooling, a light yellow jelly-like substance is obtained. ; The molar ratio of C18 alcohol, C20 alcohol and C24 alcohol mixture to polystyr...

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Abstract

The invention relates to a crude oil pour-point depressant and a preparation method thereof. The preparation method comprises that maleic anhydride and benzoyl peroxide are added into a toluene solvent, styrene is added into the mixed solution, the mixed solution is heated to a temperature of 80-85 DEG C and undergoes a reaction to produce a milk white pasty product, the reactants are cooled to a room temperature, the product is filtered and is dried at a temperature of 60 DEG C in vacuum, the product and p-toluenesulfonic acid are added into toluene, organic alcohol is added into the mixture, the mixture is cooled to form a flavescent jelly-type material, wherein a mole ratio of the organic alcohol to styrene-maleic anhydride polymer of 1: 1, and the flavescent jelly-type material is dissolved in the organic solvent so that the crude oil pour-point depressant is obtained. The crude oil pour-point depressant is a mixture of the polymer and the organic solvent, and the polymer contains carboxylic acid which can react with organic amine in colloid and asphaltene so that crude oil condensation point and viscosity are obviously improved and amine in colloid and asphaltene of crude oil producing modification influence on the crude oil can be inhibited. The crude oil pour-point depressant improves crude oil modification effects.

Description

technical field [0001] The invention relates to a crude oil point depressant and a preparation method thereof, in particular to a polystyrene-maleic anhydride derivative crude oil point depressant containing carboxylic acid. Background technique [0002] In the development of crude oil pour point depressants in recent decades, the types of them have been increasing, but they are mainly polymers with a molecular weight of several thousand to 30,000 to 50,000, such as olefins, acrylates, ethylene vinyl acetate, benzene Polymerization of monomers such as ethylene, maleic anhydride (maleic acid), acrylamide, and acrylonitrile. For polymers containing maleic anhydride, it is necessary to react with higher carbon alcohols and higher carbon amines to generate derivatives of their esters and amides. Such as ethylene-vinyl acetate copolymer, polymethacrylate long-chain ester, ethylene-methyl acrylate copolymer, acrylate-styrene copolymer, acrylate-vinyl acetate copolymer, acrylate-a...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/524C08F212/08C08F222/06C08F8/14
CPCC09K8/588C08F8/14C08F212/08C08F2810/50C09K8/524C08F222/08
Inventor 李锦昕宋学芹尹国栋赵凤英当亚红丁志杰梁建新梁军会张明徐诚党金平
Owner BC P INC CHINA NAT PETROLEUM CORP
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