碳酸二异十三酯润滑油基础油的合成

Synthesis of Di-iso-tridecyl Carbonate as Lubricating Base Oil

碳酸二异十三酯是一种性能优良的合成润滑油基础油。在甲醇钠的催化作用下,以异十三醇和碳酸二甲酯为原料合成了碳酸二异十三酯。研究了催化剂用量、原料配比、反应时间及温度等因素对酯交换反应的影响。结果表明,较佳合成工艺条件是:催化剂甲醇钠∶碳酸二甲酯=0.02∶1(物质的量比),异十三醇∶碳酸二甲酯=2.4∶1(物质的量比),反应时间2 h,反应温度160℃。实验室产品收率达80%以上,产品黏度指数介于80～90,产品倾点低于-40℃,100℃黏度大于4 mm2/s,适合于做合成润滑油基础油。碳酸二异十三酯合成油应用于SL 5W-30汽油机油中,在低温性能方面表现良好,能够达到低温指标要求。用红外光谱和质谱对反应产品进行了结构确定。

Di-iso-tridecyl carbonate is a kind of synthetic lubricating base oil with excellent performance.Di-iso-tridecyl carbonate was synthesized using iso-tridecyl alcohol and dimethyl carbonate with sodium methoxide as catalyst.The effects of the amount of catalyst,the ratio of the reactants,reaction temperature and reaction time on the product yield were investigated.The optimized molar ratio of reactants was as follows:n(sodium methoxide):n(dimethyl carbonate) = 0.02:1,n(iso-tridecyl alcohol):n(dimethyl carbon...