In the coking process, the byproduct of coking benzene. Coking benzene benzene content of more than 99.0%, but the higher the sulfur content of coking benzene, usually 300μg / g ~ 800μg / g, thus limiting the use of coking benzene. In order to reduce the sulfur content in coking benzene, broaden the scope of application of coking benzene, developed a low-pressure hydrodesulfurization coking benzene, sulfur content in coking benzene down to 1μg / g or less.
Second, the technical characteristics
(1) independently developed coking benzene hydrogenation desulfurization catalyst with high hydrodesulfurization, denitrification activity and lower aromatics saturation performance. A low hydrogen partial pressure, lower reaction temperatures, a suitable liquid hourly space velocity and the hydrogen oil ratio suitable conditions, coking benzene sulfur, nitrogen decreased 1μg / g or less, benzene saturation rate below 1.0%, the content of benzene and cyclohexane over 99.8m%.
(2) the technology process is simple, easy operation, production flexibility, long operating cycle, environmentally friendly production process and raw materials to adapt to a wide range, thereby widening the scope of application of coking benzene.
(3) by this technology to produce good quality products, liquid product yield (99.5%), chemical hydrogen consumption is low (about 0.15%).
(4) means low investment, low operating costs, with better economic benefits.
Third, the state of the art
The technology has been completed laboratory research and expert appraisal work, the ongoing promotion of industrial applications.