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发明公开
CN101981166A 润滑油基油及其制造方法和润滑油组合物 有权

润滑油基油及其制造方法和润滑油组合物
摘要：
本发明的润滑油基油是尿素加合值为4质量％以下、40℃时的动力粘度为25～50mm2/s、粘度指数为140以上、-35℃时的CCS粘度为15000mPa·s以下、闪点为250℃以上的润滑油基油。另外，本发明的润滑油基油的制造方法具有如下工序：对含有正构烷烃的原料油进行加氢裂化/加氢异构化，以使所得的被处理物的尿素加合值为4质量％以下、40℃时的动力粘度为25～50mm2/s、粘度指数为140以上、-35℃时的CCS粘度为15000mPa·s以下、闪点为250℃以上。另外，本发明的润滑油组合物含有上述本发明的润滑油基油。
摘要（英）：

Disclosed is a lubricant base oil which has a urea adduct fraction of 4 mass% or less, a kinematic viscosity of 25 to 50 mm2/s at 40 DEG C, a viscosity index of 140 or greater, a CCS viscosity of 15,000 mPa s or less at -35 DEG C, and a flash point of 250 DEG C or higher. Also disclosed is a method for producing a lubricant base oil, which comprises the step of carrying out the hydrogenation-and-decomposition/hydrogenation-and- isomerization of a raw oil comprising normal paraffin so that a product of the above-mentioned treatment can have a urea adduct fraction of 4 mass% or less, a kinematic viscosity of 25 to 50 mm2/s at 40 DEG C, a viscosity index of 140 or greater, a CCS viscosity of 15,000 mPa s or less at -35 DEG C, and a flash point of 250 DEG C or higher. Further disclosed is alubricant oil composition comprising the lubricant base oil.

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