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以烯烃、烯烃基脂肪酸酯和烯属不饱和酰胺或烯属烃磺酸盐为主要原料，合成了含蜡原油降凝剂H89－2（三元共聚物）。综合评定了H89－2改善青海原油流动性能的效果。阐明了确定降凝剂最佳添加量的原则。
The waxy crude oil pour point depressant H89-2 (terpolymer) was synthesized from olefins, olefinic fatty acid esters and ethylenically unsaturated amides or olefin sulfonates. Comprehensive evaluation of the H89-2 to improve the flow of Qinghai crude oil effect. Clarified the principle of determining the optimum amount of pour point depressant.