A method for preparing iron sulfide for catalytic heavy oil hydrocracking and a process for using the iron sulfide

Abstract

The invention discloses a preparation method of iron sulfide for catalyzing heavy oil hydrocracking. The method comprises the following steps: placing coal in a fluid bed, and burning the coal at 500-900DEG C under normal pressure to obtain dust; and separating out iron sulfide from the dust under the action of magnetic force, wherein the molecular formula of the iron sulfide is Fe1-xSx, x is less than or equal to 0.2, and the particle size of the iron sulfide is less than or equal to 30mum. The iron sulfide is added to heavy oil in order to catalyze the hydrocracking reaction of the heavy oil, and the yield of the obtained light fractions below 350DEG C can reach above 80%. The iron sulfide prepared through the method can be used in the hydrocracking reaction of the heavy oil as an active component of a catalyst or a catalyst individually.

Description

Technical field [0001] The invention relates to a method for preparing iron sulfide for catalyzing the hydrocracking of heavy oil, and a process for using the iron sulfide in the hydrocatalytic cracking of heavy oil, belonging to the technical field of catalysts. Background technique [0002] Heavy oil contains a lot of unsaturated substances, heavy hydrocarbons, and higher concentrations of sulfur, nitrogen and metal impurities. These substances can easily cause equipment coking and catalyst poisoning, so heavy oil cannot be used directly as a product. In order to obtain usable products, it is usually necessary to subject heavy oil to hydrocatalytic cracking to remove impurities and obtain saturated light hydrocarbons. [0003] Hydrocatalytic cracking is a process of decomposing heavy oil into saturated light fractions through the action of a catalyst in a hydrogen atmosphere. The catalyst usually used contains active components such as cobalt, molybdenum, nickel, tungsten, and ir...

AI Technical Summary

Problems solved by technology

The catalyst iron sulfide (FeS) in the above technology is a low-cost metal sulfide, and the preparation and catalytic process of the catalyst are completed in the heavy hydrocarbon slurry, which is convenient to operate; but the sulfur, nitrogen and other impurities in the heavy hydrocarbon slurry The conversion of iron sulfate monohydrate to iron sulfide microcrystals is very slow, thereby reducing the reaction efficiency of heavy hydrocarbon slurry catalytic cracking