FIELD: chemistry.
SUBSTANCE: invention relates to a method for raw hydrocarbon hydrotreating, which comprises contacting of the liquid raw material obtained by raw hydrocarbon contacting with a diluent and hydrogen with the first catalyst layer in the first catalyst layer of the first two-phase hydrotreating zone to produce a product effluent; contacting of the product effluent from the preceding layer with the current catalyst on the current catalyst layer of first two-phase hydrotreating zone; reusing of the current product effluent from the final catalyst layer of the first two-phase hydrotreating zone as a liquid recycling to use in a diluent at the step of liquid raw material production; contacting of hydrogen and the remaining portion of this product effluent from the final catalyst layer of the first two-phase hydrotreating zone with one or more catalysts in one or several catalyst layers of with one liquid passage. Each catalyst layer with one liquid passage at this stage is placed in a reactor filled by liquid in the second two-phase hydrotreating zone, or in a trickle bed reactor in the three-phase hydrotreating zone to produce product effluent. At that, the two-phase hydrotreating zone contains at least two catalyst layers arranged in sequence and in fluid communication. Each catalyst layer is located in a reactor is filled with liquid and contains a catalyst with a volume. The catalyst volume increases with each successive layer.
EFFECT: high conversion rates for sulfur and nitrogen removal, reduced density and increased cetane number of the product.
20 cl, 1 dwg, 3 tbl, 10 ex
