The study on properties and structure changes of residue during hydrotreating;

Distribution and removal of sulfur during hydrotreating of residue;

Research on slight expanded-bed oil residue hydrotreating reactor;

Effect of citric acid on Ni-W catalysts for hydrotreatment of coking gas oil;

A new approach for presulfiding of residue hydrotreatment catalyst;

LVI lube base oil with low pour point,high viscosity and good stability can be produced by means of hydrogenation acid removal,furfural treatment and hydrotreatment.

It is pointed out that the furfural extraction is very important in almost all the production technologies of lube base oil, including the traditional furfural extraction-MEK dewaxing-hydrogenation or clay finishing and rising hydrogenation processing and isodewaxing.

The results showed that it is successful in the industrial production of HVI special base oilby hydrogenation processing.

The bench scale test,middle scale test and semicommercial test of taking lube distillates cut from Panjin crude,Xinjiang crude and Daqing crude as feed,with hydrogenation processing technique for preparing lube base oils were described.

Development and Commercial Application of VGO Hydroprocessing Technology for FFHT Wax;

Application of circulating hydrogen oil washing in lube oil hydroprocessing unit;

On the basis of compositional characteristic and product demand of naphthenic base crude oil, a series of lube oil hydroprocessing technologies were developed successively by RIPP, such as hydro-deacid, medium pressure hydrotreating, hydrodewaxing and high-pressure hydrotreating.

Investigation on the Causes of Hydrotreating Catalyst Deactivation;