Processing of heavy oil residues with high content of sulphur and heavy metals is of great importance and practical interest. Process of the liquid phase hydrogenolysis of residues obtained from atmospheric or vacuum oil processing using a catalytic additive of the soluble metal (VI-VI11 group) salts solution dispersed into the raw material was developed in Russia.
The catalytic system is formed in a reaction zone at the contact of the additive with hot hydrogen. The sizes of both catalytical particles and raw materials are approximately equal. This fact provides reliable contacts of the phases and allow to decrease working pressure.
The optimal parameters of the process were determined on a pilot plant with output 1 ton/h, duration test was 10-30 days. Different raw materials were used.
Hydrogenolysis of tar was realised at 430-450°C under low pressure < 7 MPa at a mass rate of 1-3 h- and recycling of the process residues 30-50% with use of activating additives. Coke production in the system was not observed.
A project of industrial plant with power 0.5-1 mln ton a year including devices for catalytic additive preparation, hydrogenolysis of raw material, demetallation and utilization of the process residues, has been worked out.
The perfection of oil refining for recovery of light oil such as motor fuels and feed for petrochemical industry takes on great significance for Russian refining industry. The hydroprocessing holds the greatest promise for increased oil conversion and gains more and more popularity. But 10 residual oil hydrocracking processes carried out with pressure up to 30 MPa that have been developed recently are still on the experimental phase and are not widely spread up to now. Residual processing schemes providing necessary range of conversion, low hydrogen pressure, coke formation energy cost are still in demand.
The liquid phase low pressure hydrogenation of vacuum and atmospheric residues with the soluble metal (VI-VI11 group) salts solution dispersed into raw materials used as a catalytic additive was developed by Russian Research Institutes. The crucially new scheme of hydrogenation of heavy oil residues gives a possibility to refine the feed with the conversion level 90-95%, at temperature 440-450 C, pressure 7 MPa. The process of feedstock demetallization (V, Ni) is coincident with hydrogenation. Hydrogenation distillates are good feedstock for reforming, catalytic cracking and other processes.
The essence of this process is connected with utilization of the oil-water soluble complex catalytic additives such as soluble metal (group V-VIII) salts and activating additives and promotors mixed with a portion of feedstock that are