METHOD OF A SELECTIVE IMPROVEMENT OF A COLOUR AND COLOUR FASTNESS OF A HYDROCARBON FRACTION

摘要

Application: petrochemical. SUMMARY: hydrocarbon fraction containing dyes and dye precursors, is subjected to selective hydrogenation in the presence of a catalyst comprising a metal selected from the group consisting of palladium, platinum, ruthenium, nickel dispersed on a porous support, which is used as alumina, silicon, carbon, clay . The process is carried out in the presence of hydrogen, is completely dissolved in the feedstock at a temperature of 40-250 & amp; deg; C. 7,8-15 pressure atm., the hydrogen concentration of 0.1-3.0 mol.%, Table 6.