ALKALI-FREE DEMERCAPTANIZATION CATALYST FOR HYDROCARBON COMPOSITIONS

摘要

A catalyst is intended for the oxidative demercaptanization (sweetening) of hydrocarbons compositions including petroleum, petroleum distillates, gasolines, kerosenes, jet fuels, diesel fuels and heating oils, natural-gas liquids, etc. It may be used in a fixed-bed or fluidized-bed process. A catalyst consist of an active part and an inert component. The active part contains an oxide of a transition metal of Groups Ib, V-VIIb of the Periodic Table, either Ni or Co oxide, or mixture of oxides of the indicated elements, and transition metal salts, and nitrogen-containing organics. The inert component is an oxide of an element of Groups IIa, III, IV, or Fe oxide, or chemical compound including not less than 95 % oxides of indicated elements, or mixture of the above compounds. A method for a preparation of the catalyst is following: the inert compound is impregnated with aqueous solution of transition metal salt, the resulting product is calcined in air flow for metal oxide formation, and transition metal salt and nitrogen containing organics are deposed from their solution in organic solvent. An application of the catalyst for the oxidative demercaptanisation of hydrocarbon compositions includes passing the latter through the fixed bed or flow bed of a catalyst at 10-80 DEG C, at pressure 1-10 at. The demercaptanisation proceeds in the presence of air or oxygen, or gas, containing not less than 5 % of oxygen.