Refining process hydrocatalytic of the lubricating oils, and a catalyst for this process

摘要

A hydrofinishing process for producing lubricating oils having improved colour and oxidation stability comprises treating the oils with hydrogen at elevated temperature and pressure in the presence of a catalyst comprising the oxides of iron, cobalt, and molybdenum incorporated with a support prepared by calcining a trihydrate alumina, for example hydrargillite, at a temperature in excess of 650 DEG C., but not exceeding 900 DEG C., so that the pore diameter and total pore volume of the alumina are increased. Preferred operating conditions are:- .Temperature.150-340 DEG C .Pressure.5-80 ats .H2 feed rate.5-150 v./vol. oil .Oil feed rate.0.5-6 v./vol. cat./hr Specifications 913,047, 913,048 and 917,345 are referred toALSO:A catalyst for hydrofinishing lubricating oils comprises the oxides of iron, cobalt, and molybdenum, incorporated with a support prepared by calcining a trihydrate alumina, for example hydragillite, at a temperature in excess of 650 DEG C., but not exceeding 900 DEG C., so that the pore diameter and total pore volume of the alumina are increased. Specifications 913,047, 913,048 and 917,345 are referred to.