公开(公告)号：US4157294A

公开(公告)日：1979-06-05

申请号：US907774

申请日：1978-05-19

申请人： Yozo Iwao ,  Susumu Yamamoto ,  Takatoshi Kunihiro

发明人： Yozo Iwao ,  Susumu Yamamoto ,  Takatoshi Kunihiro

IPC分类号： C10G67/04 ,  C10G67/14 ,  C10G23/00 ,  C10G34/00

CPC分类号： C10G67/0418 ,  C10G2400/10

摘要： Base stocks for lubricating oil with excellent thermal stability are produced by hydrofinishing a mixture consisting of 10 to 60 percent by volume of a neutralized extract and 90 to 40 percent by volume of an unextracted intermediate distillate product of low total acid value, in which the neutralized extract is prepared by alkaline treating and vacuum distillation of a extract obtained by solvent extraction of said intermediate distillate product by a solvent having affinity for aromatic compounds.

摘要翻译： 具有优异热稳定性的润滑油的基础油通过加氢精制由10至60体积％的中和的提取物和90至40体积％的低总酸值的未萃取的中间馏分产物组成的混合物来制备，其中中和 通过对通过对芳族化合物具有亲和性的溶剂对所述中间馏分产物进行溶剂萃取而获得的提取物进行碱处理和减压蒸馏来制备提取物。