Three-element comb type copolymer, preparation method and application thereof
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A comb-type copolymer and terpolymer technology, applied in the field of polymers and their preparation, can solve the problems of poor generality of pour point depressants and the like
Inactive Publication Date: 2009-09-30
EAST CHINA UNIV OF SCI & TECH
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[0006] The purpose of the present invention is to overcome the disadvantages of poor versatility of most commercially available pour point depressants, and develop a polymer pour point depressant that is applicable to most crude oils and has strong versatility
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Embodiment 1
[0024] Example 1 Preparation of Ternary Comb Copolymer by Free Radical Solution Polymerization
[0025] Put 50ml of o-xylene, 5.96g of maleic anhydride, 21.56g of octadecene and 0.25g of benzoyl peroxide into a 250ml three-necked flask. Pump nitrogen gas 3 to 5 times, after fully dissolving, react at 110°C for 1.5 hours. After the temperature dropped to 75°C, 3.12g of styrene, 0.03g of benzoyl peroxide and 15ml of o-xylene were slowly dropped into the reaction system, and the reaction was continued at 75°C for 8 hours to obtain a terpolymer. Finally, 14.84 g of dodecylamine was added and reacted at 110° C. for 15 hours to complete the amination reaction, and finally a ternary comb copolymer was obtained.
Embodiment 2
[0026] Example 2 Preparation of Ternary Comb Copolymer by Free Radical Solution Polymerization
[0027] Put 50ml o-xylene, 5.96g maleic anhydride, 19.60g tetradecene and 0.20g benzoyl peroxide into a 250ml three-necked flask. Pump nitrogen 3 to 5 times, fully dissolve, and react at 120°C for 1 hour. After the temperature dropped to 85°C, 4.16g of styrene, 0.02g of benzoyl peroxide and 15ml of o-xylene were slowly dropped into the reaction system, and the reaction was continued at 85°C for 6 hours to obtain a terpolymer. Finally, 21.56 g of octadecylamine was added and reacted at 120° C. for 8 hours to complete the amination reaction, and finally a ternary comb copolymer was obtained.
Embodiment 3
[0028] Example 3 Preparation of Ternary Comb Copolymer by Free Radical Solution Polymerization
[0029] Put 50ml o-xylene, 5.96g maleic anhydride, 11.76 dodecene and 0.25g benzoyl peroxide into a 250ml three-neck flask. Pump nitrogen 3 to 5 times, fully dissolve, and react at 100°C for 2 hours. After the temperature dropped to 75°C, 4.16g of styrene, 0.02g of benzoyl peroxide and 15ml of o-xylene were slowly dropped into the reaction system, and the reaction was continued at 75°C for 8 hours to obtain a terpolymer. Finally, 26.57 g of hexadecylamine was added, and the amination reaction was completed at 100° C. for 24 hours to obtain a ternary comb copolymer.
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Abstract
The invention relates to a three-element comb type copolymer, a preparation method and application thereof. The preparation method comprises two steps: firstly, copolymerizing alpha-olefin and maleic anhydride monomer by a method of free radical polymerization, adding styrene monomer into the mixture in the polymerizing process to obtain a three-element copolymer of the alpha-olefin, the maleic anhydride and the styrene; and then, adding primary alcohol or primary amine to react with estolide, and obtaining the three-element comb type copolymer which not only contains a nonpolar alkyl lateral chain, but also contains polar carboxylic acid and aromatic group. The hydrophobic degree and size of polarity of the three-element comb type copolymer and the content of the aromatic group in the copolymer can be adjusted respectively by adjusting the alkyl length of the alpha-olefin, the primary alcohol or the primary amine, changing the dosage of the primary alcohol or the primary amine, and changing feed time and dosage of the styrene monomer. Experiment results prove that after the three-element comb type copolymer is added in a plurality of kinds of crude oil, stress yield of the crude oil is significantly reduced at low temperature, wax-crystal dimension is reduced, and the effects of pour point depression and viscosity reduction are obvious.
Description
technical field [0001] The invention relates to a polymer and its preparation method and application, in particular to preparing a ternary comb copolymer by free radical solution polymerization and applying it to pipeline transportation of crude oil and deep sea oil recovery. Background technique [0002] More than 80% of the crude oil produced in my country is waxy crude oil, and there is also a considerable amount of waxy crude oil in the crude oil produced by various countries in the world. Waxy crude oil has a high freezing point and complex rheology (the flow characteristics of non-Newtonian fluids such as thixotropy, yield stress, viscoelasticity, and dependence on shear history and thermal history at room temperature and pressure), which give rise to crude oil production, Storage and transportation have brought many problems and difficulties, such as high energy consumption for oil transportation and potential safety hazards in pipeline operation. Especially in the w...
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