METHOD OF PREPARING CATALYST AND METHOD OF PRODUCING DIESEL FUEL USING SAID CATALYST

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to a method of producing engine fuel, more specifically to a catalyst process of producing diesel fuel with improved temperature characteristics from crude oil. A method is described for preparing a catalyst for producing diesel fuel from natural raw material based on crystalline silico aluminophosphates with zeolite-like structure of the SAPO-31 type by preparing an aqeous reaction mixture which contains an aluminium source, phosphoric acid and a silicon source, as well as an organic structure forming compound, and with total composition expressed in molar ratios: R/Al₂O₃=0.5-2.0, P₂O₅/Al₂O₃=0.8-1.2, SiO₂/Al₂O₃=0.05-1.5, H₂O/Al₂O₃=15-200, where: R is an organic structure forming compound, which is a separate di-n-butylamine or a mixture of di-n-butylamine with di-n-propylamine, taken in molar ratio of 1:2, with subsequent crystallisation of the prepared mixture in hydrothermal conditions, necessary for formation of zeolite-like crystals with SAPO-31 structure, filtration, washing, drying, calcination and further introduction of a modifying group VIII metal. Also described is a method of producing diesel fuel from natural raw material at high temperature and hydrogen pressure in the presence of a catalyst, where the process is carried out in a single step and the catalyst used is crystalline silico aluminiumphosphate with a zeolite-like SAPO-31 structure, modified by a group VIII metal, obtained using the above described method.;EFFECT: high catalyst activity during hydrogenation of unsaturated hydrocarbons and ether bonds, as well as in decarbonation reactions and isomerisation formed paraffins with normal structure with high selectivity towards isomer products and with reduced formation of heavy compounds and cracking starting material; process of producing diesel fuel is carried out in a single step.;5 cl, 9 ex