Preparation method of fumaric acid pour point depressant for crude oil
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A pour point depressant, the technology of Fuma, which is used in mechanical equipment, processing of hydrocarbon oil, petroleum industry, etc., can solve problems such as poor salt resistance, and achieve the effect of easy storage, good pour point and viscosity reduction effect, and cost saving.
Active Publication Date: 2021-07-16
DESHI ENERGY TECH GRP CO LTD +1
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[0005] In order to solve the above problems, a fumaric acid pour point depressant for crude oil and its preparation method are provided. The pour point depressant prepared by the preparation method can solve the technical problems of the existing pour point depressants with poor acid resistance and salt resistance, and can be used in A higher pour point and viscosity reduction effect can be achieved by using less dosage in acidic and salty crude oil
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Embodiment 1
[0058] (1) Dissolve 400.0g of vinyl acetate, 75.0g of N-vinylpyrrolidone and 25.0g of 2-(N-acryloyloxy)ethylpyrrolidone into 495.0g of ethanol respectively, blow in nitrogen, and then heat up to 65°C. Add 5.0 g of azobisisobutyronitrile, stir evenly and react for 3 hours to obtain the first prepolymer;
[0059] (2) Weigh 480.0g of fumaric acid, 0.9g of allyl polyoxyethylene acetate and 19.1g of allyl alcohol polyoxyethylene ether into 100.0g of dimethyl sulfoxide and 395.0g of deionized water, and pass through Nitrogen, then warm up to 55°C, add 5.0g of potassium persulfate, stir evenly and react for 4h to obtain the second prepolymer;
[0060] (3) Weigh 500.0g of the second prepolymer, heat up to 85°C, add 62.5g of tetradecyl alcohol, 12.5g of cetyl alcohol, 37.5g of stearyl alcohol, 37.5g of eicosanol and 2.5g of phosphoric acid, and stir for 1 hour. ; Then add 100.0g of the first prepolymer, 90.0g of acrylamide, 10.0g of N-(hydroxymethyl)acrylamide and 0.3 g of sodium meth...
Embodiment 2
[0062] (1) Dissolve 300.0g of vinyl acetate, 15.0g of N-vinylpyrrolidone and 15.0g of 2-(N-acryloyloxy)ethylpyrrolidone into 668.0g of ethanol respectively, blow in nitrogen, and then heat up to 60°C. Add 2.0 g of azobisisobutyronitrile, stir evenly and react for 5 hours to obtain the first prepolymer;
[0063] Steps (2) (3) are the same as in Example 1 to prepare pour point depressant 2#.
Embodiment 3
[0065] (1) Weigh 350.0g of vinyl acetate, 300.0g of N-vinylpyrrolidone, and 50.0g of 2-(N-acryloyloxy)ethylpyrrolidone and dissolve them in 290.0g of ethanol, blow in nitrogen, and then heat up to 75°C. Add 10.0 g of azobisisobutyronitrile, stir evenly and react for 1 hour to obtain the first prepolymer;
[0066] Steps (2) and (3) are the same as in Example 1 to prepare pour point depressant 3#.
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Abstract
The invention discloses a fumaric acid pour point depressant for crude oil and a preparation method of the fumaric acid pour point depressant, and belongs to the technical field of crude oil pour point depression. The pour point depressant is formed by polymerizing a first prepolymer, a second prepolymer, a third monomer and a fourth monomer, the first prepolymer is formed by pre-polymerizing vinyl acetate and a first monomer, and the second prepolymer is formed by pre-polymerizing fumaric acid and a second monomer. The preparation method of the fumaric acid pour point depressant for the crude oil is simple, the prepared pour point depressant is good in acid resistance and salt resistance, the condensation point and the viscosity of the crude oil can be effectively reduced, the hydrophobicity of the pour point depressant can be improved through mutual cooperation of all the monomers, then the affinity between the crude oil and a reservoir and a pipeline is reduced, and the yield and the transportation volume are increased.
Description
technical field [0001] The application relates to a method for preparing a fumaric acid pour point depressant for crude oil, and belongs to the technical field of crude oil pour point depressant. Background technique [0002] With the maturity of oil and gas extraction technology and the increase of oil and gas extraction volume, more and more attention has been paid to the safe and efficient transportation of oil and gas energy. However, petroleum crude oil is a multi-component complex hydrocarbon mixture containing paraffin, especially the crude oil mined in my country has a high wax content, and the wax content of some crude oil can reach more than 40%. Paraffin wax in crude oil is easy to precipitate into wax crystals when the temperature is low. When the wax crystals reach a certain content, a three-dimensional network structure is formed, resulting in poor fluidity of crude oil, or even loss of fluidity. In order to solve this technical problem, often in crude oil tran...
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