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Crude oil pour point depressant

A technology for pour point and depressant of crude oil, used in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problem of pour point reduction of high pour point crude oil, and achieve good pour point depressant effect, enhanced polarity, and good synergy. Effect

Active Publication Date: 2021-04-09
CHINA PETROLEUM ENG & CONSTR +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the actual temperature of repeated heating of additive-modified crude oil is 45°C. At present, only when the repeated heating temperature reaches the treatment temperature (15°C above the wax precipitation point) of domestic pour point depressants can a good pour point depressant effect be guaranteed. Causes no effect on pour point depression of high pour point crude oil

Method used

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  • Crude oil pour point depressant

Examples

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preparation example Construction

[0047] In the embodiment of the present application, the preparation method of the modified ethylene vinyl acetate copolymer comprises:

[0048] 1) mixing and dissolving the organic peroxide and the maleic anhydride in an organic solvent to obtain a mixture;

[0049] 2) mixing the mixture with the ethylene vinyl acetate copolymer;

[0050] 3) Extrude with an extruder, shape and dry to obtain the modified ethylene vinyl acetate copolymer.

[0051] Optionally, the preparation method consists of the above steps.

[0052] In the embodiment of the present application, the organic solvent described in step 1) is selected from any one or more of acetone, petroleum ether and ethyl acetate; the sum of the organic peroxide and the maleic anhydride and The weight ratio of the organic solvent is (1 to 2): (1 to 3).

[0053] In the embodiment of the present application, the extruder described in step 3) is a parallel co-rotating twin-screw extruder, the screw speed is 30r / min to 50r / min...

Embodiment 1

[0055] In this example, the ethylene-vinyl acetate copolymer was purchased from Arkema Company, 28-800 grade;

[0056] Octadecylphenol polyoxyethylene polyoxypropylene ether was purchased from Jiangsu Haian Chemical Factory Company, P184 brand;

[0057] The isomerized cetane solvent oil is purchased from Guangdong Qixu Chemical Co., Ltd., IP16 brand;

[0058] The mixed aromatics are purchased from Beijing Defu Daye Co., Ltd., with a density of 0.85g / cm 3 to 0.91g / cm 3 , Closed flash point 65 ℃ to 75 ℃.

[0059] Add 1 weight part maleic anhydride (MAH) with 100 weight parts ethylene-vinyl acetate copolymer EVA (vinyl acetate VA content 28%, melt index 800g / 10min), 0.1 weight part initiator dicumyl peroxide ( DCP), melt grafting to obtain a modified ethylene-vinyl acetate copolymer, that is, a modified EVA copolymer. The preparation process is as follows:

[0060] Dissolve dicumyl peroxide (DCP) and maleic anhydride (MAH) in acetone (the weight ratio of dicumyl peroxide and...

Embodiment 2

[0064] In this example, the ethylene-vinyl acetate copolymer was purchased from Korea Hyundai Company, EVA810 brand;

[0065] Octadecylphenol polyoxyethylene polyoxypropylene ether was purchased from Jiangsu Haian Chemical Factory, P184 brand;

[0066] The isomerized cetane solvent oil is purchased from Guangdong Qixu Chemical Co., Ltd., IP16 brand;

[0067] Described mixed aromatics is identical with mixed aromatics in embodiment 1;

[0068] With 100 parts by weight of ethylene-vinyl acetate copolymer EVA (vinyl acetate VA content 33%, melt index 45g / 10min) add 0.8 parts by weight of maleic anhydride (MAH), 0.06 parts by weight of initiator dicumyl peroxide ( DCP), melt grafting to obtain modified ethylene-vinyl acetate copolymer, namely modified EVA copolymer. The preparation process is the same as in Example 1. Based on the weight of the modified ethylene-vinyl acetate copolymer, the graft rate of the modified ethylene-vinyl acetate copolymer is 0.6wt.%; the crosslinking...

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Abstract

A crude oil pour point depressant comprises 10-40 parts of a modified ethylene vinyl acetate copolymer, 10-40 parts of a surfactant and 20-80 parts of a solvent, wherein the modified ethylene-vinyl acetate copolymer contains a structural unit derived from a vinyl acetate monomer; at least part of the structural units contain grafting groups; the grafting group is maleic anhydride; based on the weight of the modified ethylene-vinyl acetate copolymer, the grafting ratio of the modified ethylene-vinyl acetate copolymer is 0.05 wt.% to 0.7 wt.%; and the cross-linking rate of the modified ethylene-vinyl acetate copolymer is 0-0.01%. The crude oil pour point depressant provided by the invention can effectively reduce a crude oil pour point, polar modified EVA, a surfactant with a long-chain alkyl group and isoparaffin solvent oil are used together, a very good synergistic effect is achieved, and a good pour point depressing effect can still be kept at a low-temperature repeated heating temperature or even a low treatment temperature.

Description

technical field [0001] The present application relates to but not limited to the field of petrochemical technology, especially relates to but not limited to a crude oil pour point depressant. Background technique [0002] With the continuous increase in the production of high-condensation and high-viscosity crude oil worldwide, energy-saving and safe gathering and transportation of high-condensation and high-viscosity crude oil are increasingly becoming research hotspots in developed countries in the petroleum industry. At present, the crude oil produced by several major oilfields (Sudan, Chad, and Niger) developed by CNPC in the Central African region is a typical high-condensation and high-viscosity crude oil. From the perspective of reducing energy consumption and production costs and improving pipeline operation safety, adding synthetic polymer chemical modifiers to crude oil can reduce the freezing point of crude oil and improve its low-temperature fluidity. It is an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/22
CPCC10G29/22C10G2300/304
Inventor 邵北礼李世洪崔海滨张云天刘瑞王楠
Owner CHINA PETROLEUM ENG & CONSTR
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