| 摘要 |
PURPOSE:To prepare a base lubricating oil having a low pour point, under mild conditions and persistent catalyst activity, by using a specified binderless crystalline aluminosilicate as catalyst in the production of base lubricating oil by catalytic dewaxing of raffinate. CONSTITUTION:Used as caralyst is a binderless rystalline aluminosilicate, pref. metal-contg. hydrogen type ISZ zeolite in pellets having a particle diameter of about 1.5mm., which gives an X-ray diffraction pattern of substantially crystalline aluminosilicate showing a single diffraction curve when 2theta is 14.7 deg. and clearly separated diffraction curves at 2theta=23 deg. and 2theta=23.3 deg.. A hydrocarbon oil (having a boling point of about 250-650 deg.C) obtained by treating a distillate oil fraction of paraffinic crude oil with a selective solvent for aromatic hydrocarbon and hydrogen are made to interact in the presence of the above catalyst. |
