总结了当前在急冷油粘度变化和减粘剂减粘原理方面的研究进展；

And the research progress of mechanisms of quench oil viscosity changing and mechanisms of anfifoulant were summaned.

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加氢裂化尾油粘度指数高，低硫、低氮、杂质含量少，倾点和粘度偏高。

The hydrocracking tail oil possesses the characteristics of higher viscosity index, pour point, viscosity and lower sulfur, nitrogen, impurity content.

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对菜籽油的环氧化工艺进行了改进，并研究了反应条件对环氧油粘度的影响。

The epoxidation technique of rape seed oil was improved and the effects of the reaction conditions on the viscosity of epoxidized oil was also studied.

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