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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 the problems of reducing crude oil viscosity, poor crude oil pour point depressing effect, single molecular structure, etc., to reduce crude oil viscosity, easy The effect of simple control and preparation method

Active Publication Date: 2019-08-30
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the 20th century, the pour point depressant has roughly experienced several stages such as homopolymer, copolymer, compound type and compound type products, among which the properties of the copolymer play a decisive role in the pour point depressant. According to the chemical composition, it can be divided into the following three types: (1) EVA type, ethylene-vinyl acetate copolymer (EVA) is a pour point depressant with a wide range of applications and good application effects, such as USP 3981850, CN105482798A All disclose the crude oil pour point depressant with ethylene and vinyl acetate as raw material, but because its molecular structure is single, has selectivity to different kinds of crude oil, so it is poor to some crude oil pour point depressant
However, it has not been found in the literature that the direct polymerization method of introducing alkyl long chains and polyoxyethylene polyoxypropylene long chains into the polymer chain can be used to obtain a pour point depressant, so as to reduce the viscosity of crude oil on the basis of lowering the freezing point of crude oil data report

Method used

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  • Crude oil pour point depressant and preparation method thereof
  • Crude oil pour point depressant and preparation method thereof
  • Crude oil pour point depressant and preparation method thereof

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preparation example Construction

[0030] The embodiment of the present invention also provides a kind of preparation method of the crude oil pour point depressant as described in the above embodiment, comprising the following steps: the higher alcohol ester of unsaturated acid, the polyoxyethylene polyoxypropylene ether of unsaturated alcohol and Add vinyl acetate into the reaction vessel according to the set ratio, add the solvent, stir evenly, slowly raise the temperature, then add the initiator dropwise, under the protection of nitrogen, pass through at a reaction temperature of 80°C-110°C, and a reaction time of 3- A polymerization reaction occurs under the condition of 8 hours to obtain a crude oil pour point depressant.

[0031] The above-mentioned embodiment provides a kind of preparation method of crude oil pour point depressant, wherein, three kinds of monomers are produced to obtain terpolymer by direct polymerization reaction under the action of solvent, initiator, in above-mentioned preparation meth...

Embodiment 1

[0041] Preparation of Unsaturated Acid Fatty Alcohol Esters

[0042] Mix acrylic acid and lauryl alcohol at a molar ratio of 0.8:1, add 30% toluene as a solvent, then mix 1% concentrated sulfuric acid with the above raw materials, put them into a four-necked flask together, add a polymerization inhibitor, and gradually heat up to Reflux dehydration at 90°C, stop the reaction after the water output reaches the theoretical value after 3 hours of reaction, use Na 2 CO 3 The solution was washed, and then washed with water, and the layers were separated, and the organic phase was extracted to obtain lauryl acrylate, which was set aside.

[0043] Preparation of Unsaturated Alcohol Polyoxyethylene Polyoxypropylene Ether

[0044] Put 1mol of propylene alcohol into the autoclave, add NaOH as catalyst, vacuumize, N 2 Purge three times, gradually raise the temperature to 100°C, continuously feed ethylene oxide and propylene oxide, and keep the reaction pressure at 0.1MPa. After the fe...

Embodiment 2

[0050] Preparation of Unsaturated Acid Fatty Alcohol Esters

[0051] Mix methacrylic acid and cetyl alcohol in a molar ratio of 1:1, add 50% cyclohexane as a solvent, then mix 2% concentrated phosphoric acid with the above raw materials, put them into a four-necked flask together, and add a polymerization inhibitor , Gradually raise the temperature to 70°C for reflux dehydration, stop the reaction after the water output reaches the theoretical value after 4 hours of reaction, use Na 2 CO 3 The solution was washed, and then washed with water, and the layers were separated, and the organic phase was extracted to obtain cetyl methacrylate, which was set aside.

[0052] Preparation of Unsaturated Alcohol Polyoxyethylene Polyoxypropylene Ether

[0053] Put 1mol of butenol into the autoclave, add Ca(OH) 2 As a catalyst, vacuum, N 2 Purge three times, gradually raise the temperature to 110°C, continuously feed ethylene oxide and propylene oxide, and keep the reaction pressure at ...

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Abstract

The invention proposes a crude oil pour point depressant and a preparation method thereof, belonging to the field of crude oil pour point depressant, which can well reduce the viscosity of crude oil and improve its fluidity on the basis of significantly lowering the pour point of crude oil, and has a good effect on the subsequent crushing of crude oil. Milk dehydration has no negative effects. The crude oil pour point depressant is a terpolymer formed by polymerizing high-carbon alcohol ester of unsaturated acid, polyoxyethylene polyoxypropylene ether of unsaturated alcohol and vinyl acetate. The invention can be applied to the aspect of pour point depressing of crude oil.

Description

technical field [0001] The invention belongs to the field of crude oil pour point depressant, in particular to a crude oil pour point depressant and a preparation method thereof. Background technique [0002] my country's oilfields produce more waxy crude oil, but due to the high freezing point of waxy crude oil, the problem of gathering and transportation of this part of crude oil is particularly serious. At present, my country mainly uses physical and chemical methods to solve the problem of waxy crude oil transportation. Among them, the physical method mainly adopts heating or pipeline surface treatment, but because the fuel power energy consumption of heating accounts for more than 30% of the total cost of oil transportation, the energy consumption is large, the cost is high, and it cannot be implemented in areas lacking heating conditions, so it is not feasible. commonly used. The chemical method is divided into emulsification pour point depressing method, suspension ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524C08F283/06C08F218/08C08F220/18
CPCC09K8/524C08F283/065C08F220/1818C08F220/1812
Inventor 张志庆王芳杨春天周亭王秀凤张国栋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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