油溶性稠油降黏剂MSA的合成及影响因素研究

Study on the Synthesis and Influence Factors of an Oil-soluble Heavy Oil Viscosity Depressant MSA

崔 敏 李 传 文 萍 邓文安

CUI Min LI Chuan WEN Ping DENG Wen-An

本文研究了油溶性稠油降黏剂马来酸酐-苯乙烯-丙烯酸十八醇酯共聚物（MSA）的最佳合成方法，并考察了MSA加量、助剂加量、水含量以及实验温度对胜利稠油降黏效果的影响。结果表明，对于胜利稠油，MSA最佳合成条件为：溶剂甲苯、总单体质量比为1:1、丙烯酸十八醇酯、苯乙烯、马来酸酐摩尔比为6:1:2、反应温度为90℃、反应时间为4 h。MSA的最佳加量为1.0%，最佳实验温度为90℃。此外，助剂十二烷基磺酸钠的加入能明显提高MSA的降黏效果，最佳加量为0.8%。随着胜利稠油模拟油中水含量的增加，MSA降黏效果增加，当水含量达到40%时，MSA降黏率可达90%以上。

the best synthetic method of the copolymer of maleic anhydride, styrene and octadecyl acrylate(MSA), an oil-soluble heavy oil viscosity depressant, was investigated and the effects of the dosage of MSA, sodium dodecane sulphonate as adjuvant and water on the viscosity reduction of the Shengli heavy simulated oil was probed. The results showed that the best synthetic conditions of MSA were as follows, the mass ratio of solvent toluene and total monomers were 1:1, the mol ratio of octadecyl acrylate, styrene and maleic anhydride were 6:1:2, the synthetic temperature were 90℃ and the synthetic time were 4 h. When the dosage of MSA was 1.0% and the temperature was 90℃, the effect of viscosity reduction of Shengli heavy simulated oil was the best. Besides, the adjuvant of sodium dodecane sulphonate could improve the effect of viscosity reduction of Shengli heavy simulated oil evidently, and the best dosage of sodium dodecane sulphonate was 0.8%. As the content of water in raw oil increased, the effect of viscosity reduction of Shengli heavy simulated oil increased, and when the content of water in raw oil was up to 40%, the ratio of viscosity reduction of Shengli heavy simulated oil exceeded 90%.