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Crude oil pour point depressant and preparation method thereof

A technology of crude oil pour point depressant and active agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problems of high energy consumption in the heating viscosity reduction method, unsatisfactory use effect of crude oil pour point depressant, and high cost of use. problem, to achieve the effect of small dosing dosage, good anti-wax effect and low cost

Active Publication Date: 2010-09-29
HUBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the technical problems of high energy consumption of the existing crude oil heating viscosity reduction method, dehydration treatment required for the oil-in-water method, and high cost of use, and also solves the technical problem of the unsatisfactory use effect of the existing crude oil pour point depressant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: take toluene as solvent, add polymerization inhibitor hydroquinone (1.0% of acrylic acid quality), catalyst p-toluenesulfonic acid (1.0% of acrylic acid quality), under the condition of 120 ℃, use twelve Alcohol and acrylic acid are esterified, the reaction time is 6 hours, the esterified product is washed with 5% sodium bicarbonate dilute lye, and then washed with water until neutral, the water phase is separated, and then the toluene is distilled to obtain higher alcohol acrylate ; Then monomer acrylate higher alcohol ester is mixed with monomer methacrylic acid, maleic anhydride, styrene in proportion, wherein the mol ratio of acrylate higher alcohol ester and methacrylic acid, maleic anhydride, styrene mixture is 2 : 1, and the mol ratio of methacrylic acid and maleic anhydride to styrene is 1: 1: 1, with toluene as solvent, benzoyl peroxide as initiator (0.8% of total monomer mass), under nitrogen protection Under the condition of polymerization at 60...

Embodiment 2

[0016] Embodiment 2: Take toluene as solvent, add polymerization inhibitor hydroquinone (1.0% of acrylic acid quality), catalyst p-toluenesulfonic acid (1.0% of acrylic acid quality), under the condition of 135 ℃, use sixteen Alcohol and acrylic acid are esterified, the reaction time is 6 hours, the esterified product is washed with 5% sodium bicarbonate dilute lye, and then washed with water until neutral, the water phase is separated, and then the toluene is distilled to obtain higher alcohol acrylate ; Then monomer acrylate higher alcohol ester is mixed with monomer methacrylic acid, maleic anhydride, styrene in proportion, wherein the mol ratio of acrylate higher alcohol ester and methacrylic acid, maleic anhydride, styrene mixture is 2 : 1, and the mol ratio of methacrylic acid and maleic anhydride to styrene is 1: 1: 1, with toluene as solvent, benzoyl peroxide as initiator (0.8% of total monomer mass), under nitrogen protection Under the condition of polymerizing at 65°...

Embodiment 3

[0017] Embodiment 3: Take toluene as solvent, add polymerization inhibitor hydroquinone (1.0% of acrylic acid quality), catalyst p-toluenesulfonic acid (1.0% of acrylic acid quality), under the condition of 130 ℃, use sixteen Alcohol and acrylic acid are esterified, the reaction time is 6 hours, the esterified product is washed with 5% sodium bicarbonate dilute lye, and then washed with water until neutral, the water phase is separated, and then the toluene is distilled to obtain higher alcohol acrylate ; Then monomer acrylate higher alcohol ester is mixed with monomer methacrylic acid, maleic anhydride, styrene in proportion, wherein the mol ratio of acrylate higher alcohol ester and methacrylic acid, maleic anhydride, styrene mixture is 2.5 : 1, and the mol ratio of methacrylic acid and maleic anhydride to styrene is 1: 1: 1, with toluene as solvent, benzoyl peroxide as initiator (0.8% of total monomer mass), under nitrogen protection Under 70 ℃ temperature polymerization, r...

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Abstract

The invention discloses a crude oil pour point depressant, which is compounded by the following components in percentage by weight: 99.0 to 99.8 percent of quadripolymer, 0.1 to 0.5 percent of fumed silica, and 0.1 to 0.5 percent of nonionic fluorocarbon surfactant, wherein the quadripolymer is formed by polymerizing monomer higher alcohol acrylate, methylacrylic acid, maleic anhydride, and styrene. The crude oil pour point depressant has the advantages of small dosage, great pour point depression, excellent wax resistance effect, and the like. The experimental results prove that: the pour point depressant obviously lowers the condensation point of the crude oil, widens the Newton fluid temperature range of the crude oil, and reduces the viscosity at non-Newton fluid temperature. In the application of Jianghan oilfield, the freezing point of the crude oil can be reduced to 7 DEG C below zero from 25 DEG C by adding 0.025 mass percent of the pour point depressant, the reduction range is 32 DEG C, and the on-site using effect is good.

Description

technical field [0001] The invention relates to a pour point depressant, in particular to a crude oil pour point depressant and a preparation method thereof. Background technique [0002] The crude oil in most oilfields in my country is high-wax crude oil, with a wax content of about 20%, and some even close to 40%. Adsorb or enclose oil with low freezing point, oil sludge, colloid and asphaltene in the network structure to form a waxy paste-like substance, which reduces or even loses the fluidity of crude oil. These wax crystals are also very easy to deposit on the metal walls of downhole equipment, oil pipelines, storage tanks, etc., causing pipeline blockage and causing great difficulties for crude oil extraction, gathering and transportation, especially under low temperature conditions, and long-distance gathering and transportation. At present, for long-distance pipeline oil transportation, one method is to use a station-by-station heating process to raise the temperatu...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/524
Inventor 周立新潘德华
Owner HUBEI UNIV
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