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A pour point depressant and viscosity depressant for high pour point thick oil and preparation method thereof

A technology of high pour point heavy oil and pour point depressant, applied in the field of pour point depressant and viscosity reducer, which can solve the problems of high wax content and inability to reduce viscosity of high pour point heavy oil

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a typical representative of low-grade crude oil, heavy oil not only has high wax content but also high asphaltene content. To change the low-temperature fluidity of high-condensation heavy oil, it is necessary not only to lower the freezing point of heavy oil, but also to reduce the viscosity. The method of crude oil viscosity mainly includes adding viscosity reducer. Water-soluble viscosity reducer is the most widely used viscosity reduction method at present. Its main mechanism is to emulsify and disperse heavy oil with surfactant solution under stirring conditions, so that heavy oil and heavy oil The friction between water and water becomes the friction between water, but under the condition of low temperature and weak power, the effect of reducing viscosity cannot be achieved for high pouring heavy oil. Sticky chemicals are still blank

Method used

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  • A pour point depressant and viscosity depressant for high pour point thick oil and preparation method thereof
  • A pour point depressant and viscosity depressant for high pour point thick oil and preparation method thereof
  • A pour point depressant and viscosity depressant for high pour point thick oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: pour point and viscosity reducer A 1 preparation of

[0028] (1) Add 1mol catechol and 550g solvent N,N-dimethylformamide into a three-necked flask, heat up to 45°C, stir at 200rpm, and stir for 20min; add 110g of potassium carbonate into the three-necked flask, Raise the temperature to 78°C; then add 1.0mol dodecyl bromide while stirring, the stirring speed is 500rpm, after reacting for 10h, cool to room temperature, pour the reaction liquid into ice water at 0°C, and filter the solid precipitate in the reaction liquid to obtain The crude product was dried in an oven at 80°C for 24 hours to obtain the intermediate o-hydroxyphenyl ether;

[0029] (2) Add the above-mentioned intermediate o-hydroxyphenyl ether into a round-bottomed flask, add 22g of copper nitrate and 55g of acetic acid, the temperature is 30°C, and the stirring speed is 300rpm. After completely dissolving, the reaction temperature is raised to 50°C and stirred The speed is 250rpm, and the re...

Embodiment 2

[0033] Example 2: pour point and viscosity reducer A 2 preparation of

[0034] (1) Add 1mol catechol and 700g solvent N,N-dimethylformamide into a three-necked flask, raise the temperature to 30°C, stir at 250rpm, and stir for 40min; add 135g potassium carbonate into the three-necked flask, Raise the temperature to 76°C; then add 1.2mol tetradecyl bromide while stirring, the stirring speed is 520rpm, after reacting for 12h, cool to room temperature, pour the reaction liquid into ice water at 0°C, and filter the solid precipitate in the reaction liquid to obtain The crude product was dried in an oven at 83°C for 30 hours to obtain the intermediate o-hydroxyphenyl ether;

[0035](2) Add the above-mentioned intermediate o-hydroxyphenyl ether into a round bottom flask, add 32g of copper nitrate and 88g of acetic acid, the temperature is 32°C, and the stirring speed is 350rpm. After completely dissolving, the reaction temperature is raised to 55°C and stirred The speed is 300rpm,...

Embodiment 3

[0039] Example 3: pour point and viscosity reducer A 3 preparation of

[0040] (1) Add 1mol catechol and 950g solvent N,N-dimethylformamide into a three-necked flask, raise the temperature to 38°C, stir at a speed of 300rpm, and stir for 30min; add 150g of potassium carbonate into the three-necked flask, Raise the temperature to 75°C; then add 1.3mol hexadecyl bromide while stirring, the stirring speed is 550rpm, after reacting for 13h, cool to room temperature, pour the reaction liquid into ice water at 0°C, and filter the solid precipitate in the reaction liquid to obtain The crude product was dried in an oven at 86°C for 32 hours to obtain the intermediate o-hydroxyphenyl ether;

[0041] (2) Add the above-mentioned intermediate o-hydroxyphenyl ether into a round bottom flask, add 45g of copper nitrate and 60g of acetic acid, the temperature is 33°C, and the stirring speed is 380rpm. After completely dissolving, the reaction temperature is raised to 60°C and stirred The sp...

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Abstract

The invention relates to a pour point and viscosity depressant used in heavy oil exploitation to reduce the freezing point and viscosity of crude oil and improve the fluidity of crude oil, in particular to a viscosity and pour point depressant for highly poured heavy oil and a preparation method thereof . The pour point and viscosity reducer is formed by reacting catechol with n-bromoalkane under the catalysis of potassium carbonate to generate intermediate o-hydroxyphenyl ether, and then generates intermediate nitrobenzene derivatives through nitration reaction under acidic conditions, and finally reacts with hydrazine hydrate Response gets. The preparation process of the pour point and viscosity reducer of the present invention is simple, the preparation cost is low, the product is non-toxic and harmless, and the yield is high, reaching more than 95%. The freezing point of heavy oil is lowered by more than 12°C, and the viscosity is lowered by more than 92%. Therefore, the present invention can be widely applied in field tests of pour point and viscosity reduction of high pour point heavy oil.

Description

technical field [0001] The invention relates to a pour point and viscosity depressant used in heavy oil exploitation to reduce the freezing point and viscosity of crude oil and improve the fluidity of crude oil, in particular to a viscosity and pour point depressant for highly poured heavy oil and a preparation method thereof . Background technique [0002] Most of my country's oil fields produce high waxy crude oil, the wax content is as high as 15-37%, and some crude oil wax content is as high as more than 40%. As the temperature decreases, paraffin molecules in crude oil crystallize and grow in the form of sheets or needles, and the sheets are connected to each other, eventually developing into a three-dimensional network structure similar to a card house. This leads to high freezing point and poor low-temperature fluidity of waxy crude oil, which brings difficulties to the extraction and transportation of crude oil. Therefore, it is very important to lower the freezing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C07C213/02C07C217/84
CPCC07C41/16C07C201/08C07C213/02C07C217/84C09K8/584C07C205/37C07C43/23
Inventor 张星王增林段伟刚蒋焱孟勇刘延峰宋志东代兴益冯雷雷
Owner CHINA PETROLEUM & CHEM CORP
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