Based on molecular management and composition of reformate raffinate, separation of nor- mal paraffins from reformate raffinate through adsorption process was studied in the 5A molecular sieve fixed bed.

In order to prolong the running cycle of producing high purity n-hexane from reformate raffinate through adsorption-distillation technology,coking of olefins in the channels of 5A molecular sieve and regeneration of coked 5A molecular sieve were studied by microstructure analysis.

Daqing crude oil was separated into tree components of asphaltene, polar fraction and remaining fraction with precipitation method and silica gel column.

Kelamayi crude oil was separated into asphaltene, polar fraction and remaining fraction by precipitation method and separation through silica gel column.

Reaction of hydrogenated pyrolysis gasoline raffinate partly incorporated with isomerization feed stocks,was studied in an experimental unit,using commercial xylene isomerization catalyst and technology.

Under the conditions of an extraction temperature of 70 ℃ and a VGO/NMP phase ratio of 2, the raffinate yield and de aromatics rate were all higher than 70%, and the BMCI value of the raffinate was lower than 16.

The combined trapezoid spray trays(CTST)developed by Hebei University of Technology have been successfully used in the technical transform of the reformer raffinate fractionating column in Shijiazhuang Refinery.