PURPOSE: To produce efficiently hydrocarbon oil having excellent low-temperature flow characteristics, by bringing a hydrocarbon fraction having a boiling range of 200W600°C into contact with a catalyst contg. zeolite, alumina and a metallic component in a hydrogen atmosphere.
CONSTITUTION: A catalyst contg. zeolite (A) which exhibits an X-ray diffraction pattern of Table 1 in the alkali type of the formula (wherein M is an alkali metal or alkaline earth metal; n is the valence of M; X is 15W60; Y is 0W25) and has a mesitylene adsorption (JIS-K-1412) of 16wt% or above in the acid type, alumina (B) (pref. γ- or η-alumina) and at least one metallic compd. (C) selected from among compds. of Group VIb and VIII metals (e.g. CoO, MoO2 and WO3) (the weight ratio of A to B is 10/1W1/10, the quantity of component C is 10W40wt% based on that of component B) is used. When said catalyst is used, hydrocarbon fraction can be dewaxed and desulfurized at a relatively low temp. stably over a long period of time to obtain hydrocarbon oil having low-temperature flow characteristics in high yields.
FUJII MASAMI
YOSHIKAWA NORIO
INOUE TAKEHISA
TORAY INDUSTRIES