Composite catalyst for gasoline hydrogenation

Abstract

The invention discloses a composite catalyst for gasoline hydrogenation. The preparation method comprises the following steps: (1) preparing a carrier, namely respectively preparing an aluminum chloride solution and a sodium silicate solution by using a certain amount of aluminum chloride and sodium silicate, soaking a molecular sieve in the aluminum chloride solution, taking out the molecular sieve, naturally airing, soaking the molecular sieve in the sodium silicate solution, naturally airing, and calcining the aired molecular sieve at a certain calcination temperature, thereby obtaining a coated molecular sieve carrier; and (2) preparing a catalyst, namely by taking a mixed solution of ferric nitrate, nickel nitrate and ammonium molybdate as impregnation liquid, soaking the carrier in the impregnation liquid for 2 minutes at room temperature, drying at the temperature of 120 DEG C for 30 minutes, repeating the operation for 2-5 times, firing at the temperature of 500 DEG C for 4 hours, and naturally cooling, thereby obtaining the composite catalyst. The catalyst disclosed by the invention has proper pore structure distribution and reactive metals and has the characteristics of stable physicochemical properties, high specific surface area, high pore volume and high desulfurization selectivity; and moreover, the raw materials are readily available, and the processing operation is simple.

Description

technical field [0001] The invention belongs to the technical field of gasoline processing, in particular to a composite catalyst for gasoline hydrogenation. Background technique [0002] Hydrocracking is a process in the petrochemical industry, that is, in the process of petroleum refining, under relatively high pressure and temperature, hydrogen is used as a catalyst to make heavy oil undergo hydrogenation, cracking and isomerization reactions, and convert it into light The processing of high-quality oil (gasoline, kerosene, diesel or catalytic cracking, cracking raw materials for olefins). It differs from catalytic cracking in that the catalytic cracking reaction is accompanied by the hydrogenation reaction of hydrocarbons. Hydrocracking is essentially an organic combination of hydrogenation and catalytic cracking processes, which enables heavy oil products to produce light oil products such as gasoline, kerosene and diesel oil through catalytic cracking reactions, preve...

AI Technical Summary

Problems solved by technology

Although hydrocracking has many advantages, it is not widely used like catalytic cracking because it operates under high pressure, requires more alloy steel, consumes more hydrogen, and has higher investment.