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A kind of preparation method of high waxy crude oil pour point depressant

A crude oil pour point depressant and pour point depressant technology, which is applied in mechanical equipment, pipeline systems, gas/liquid distribution and storage, etc. The effect of controlling the degree of reaction polymerization, reducing safety risks, and good pour point reducing effect

Active Publication Date: 2022-08-02
DESHI ENERGY TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the pour point depressants in the prior art are suitable for waxy crude oil, but the pour point depressant effect on high waxy crude oil with a wax content higher than 20% is poor, or even ineffective, and is not suitable for high pour point and high waxy crude oil applications pour point depressant

Method used

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  • A kind of preparation method of high waxy crude oil pour point depressant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of preparation method of high waxy crude oil pour point depressant:

[0026] (1) Preparation method of pour point depressant intermediate

[0027] In a dry and clean reaction kettle, the molten reactant α-olefin and organic solvent xylene are put in by a vacuum pump, and the temperature is raised to about 50°C to 75°C with stirring. After 110-130 min of the reaction for keeping the temperature of the agent, the temperature is lowered to obtain the intermediate of pour point depressant;

[0028] Wherein, the initiator is added in four times in turn. In terms of parts, the first addition is 10-15 parts, and the temperature is kept at 125 ° C for 25-35min; the second addition is 20-30 parts, and the heat is kept for 25-35min; The third addition is 20-30 parts, and the temperature is kept for 85-95 minutes; the fourth addition is 30-40 parts, and the temperature is kept for 85-95 minutes.

[0029] (2) Preparation method of finished product of crude po...

Embodiment 2

[0036] Example 2: Characterization

[0037] The high waxy crude oil used in this example is used as the experimental oil, the freezing point of the experimental oil is 33 ° C, the wax content is 23%, the colloidal asphaltene content is 10-15%, and the viscosity is 800-1200mPa. s, the pour point of crude oil pour point depressant is tested according to the standard of GB / T510-1983.

[0038] In this example, the viscosity is the viscosity value of the crude pour point depressant at 60°C.

[0039] The flash point is tested according to GB / T 261.

[0040]Table 2 Performance test results of crude oil pour point depressant

[0041] Sample serial number Freezing point / ℃ Decrease / ℃ Flash point / ℃ Viscosity mPa.s Solid content / % Molecular weight Mw 1 13 10 28 260 89 6000 2 8 15 25 200 85 5120 3 3 20 35 150 90 7500 Comparative Example 1 16 7 26 310 53 8500 Comparative Example 2 18 5 23 280 57 8126 Comparative...

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Abstract

The present application proposes a method for preparing a pour point depressant for high waxy crude oil, which includes using α-olefin and maleic anhydride to carry out a free radical copolymerization reaction to obtain a pour point depressant intermediate, and then esterifying the pour point depressant intermediate with aliphatic alcohol. The process of obtaining crude pour point depressant products through chemical reaction, and the fatty alcohol is a mixed alcohol of higher alcohol and Guerbet alcohol. The present application utilizes α-olefin and maleic anhydride to undergo a copolymerization reaction to form a copolymer, and at the same time, maleic anhydride itself has an acid anhydride, which can react with aliphatic alcohol to be esterified to obtain a pour point depressant, which has a good pour point depressant effect. In this application, a large branched Guerbet alcohol is introduced on the basis of the copolymer to improve the molecular structure of the pour point depressant, so that the content of the product is increased to 80%, the freezing point is less than or equal to 15°C, and the safety of the product due to low concentration transportation is reduced. risk and save on shipping costs.

Description

technical field [0001] The application belongs to the field of preparation of pour point depressants, and in particular relates to a preparation method of a pour point depressant for high waxy crude oil. Background technique [0002] my country is rich in high waxy crude oil, which is characterized by high wax content, high freezing point, and low viscosity. The solubility of wax in crude oil decreases with the decrease of temperature. When a certain temperature is reached, wax crystals begin to precipitate. The temperature at this time is called For the wax precipitation point (cloud point). As the temperature further decreases, more and more wax crystals are precipitated in the crude oil, which makes the crude oil lose its fluidity as a whole, brings difficulties to the transportation of crude oil, and reduces the utilization rate of equipment and facilities, affecting the production pipeline. And the circulation capacity of gathering and transportation pipelines, causing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/14C08F222/06C08F8/14C08F2/06F17D1/16
CPCC08F210/14C08F222/06C08F8/14C08F2/06F17D1/16
Inventor 崔仕章修宗明崔学章郭玉玺刘小芳于长禄张向红
Owner DESHI ENERGY TECH GRP CO LTD
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