Citation: WANG Zhenkun, WU Zhongkui, MIAO Linhui, XU Bing, ZHU Zhe, DAI Siyu. Effect of Silsesquioxane/Modified Ethylene-Vinyl Acetate Copolymer Compounded Pour Point Depressant on Pour Point of Waxy Oil[J]. Chinese Journal of Applied Chemistry, ;2020, 37(7): 772-777. doi: 10.11944/j.issn.1000-0518.2020.07.190339 shu

Effect of Silsesquioxane/Modified Ethylene-Vinyl Acetate Copolymer Compounded Pour Point Depressant on Pour Point of Waxy Oil

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

Corresponding author: WU Zhongkui, zhongkuiwu@163.com
Received Date: 16 December 2019
Revised Date: 18 March 2020
Accepted Date: 24 April 2020

Fund Project: the National Natural Science Foundation of China 50973087the National Natural Science Foundation of China 51173141Supported by the National Natural Science Foundation of China(No.50973087, No.51173141)

Figures(7)

Ethylene-vinyl acetate copolymer (EVA) is a commonly used pour point depressants (PPDs) for crude oil, but its molecular structure is relatively simple and it has poor pour point depressing effect on some oils. In order to enhance its effect on pour point, long alkyl side chain modified EVA was prepared by a simple method of direct reaction of stearoyl chloride with hydroxylated EVA, and was compounded with alkyl long-chain silsesquioxane nanoparticles (SS). The pour point depressant effect and the mechanism of modified EVA and SS compound pour point depressants on wax oil were studied. The compounded pour point depressant provides crystal nuclei for the wax, making the wax crystals smaller and difficult to overlap and reducing the amount of wax precipitation. When the compounding ratio is m(EVA-g):m(SS-L)=1:2 and the mass fraction in wax oil is 0.1%, the pour point is reduced by 25 ℃.
- ethylene-vinyl acetate copolymer,
- stearoyl chloride,
- silsesquioxane,
- pour point depressant,
- waxy oil
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