Oxidation desulphurization catalyst for reducing sulphur content of diesel fraction and preparation method thereof

Abstract

The invention relates to an oxidation desulphurization catalyst for reducing sulphur content of diesel fraction and a preparation method thereof. The oxidation desulphurization catalyst comprises the following main components: 1,4-sodium dihydro-anthraquinone sulfonate, 1,4-potassium dihydro-anthraquinone sulfonate and 1,4-dihydroxy anthraquinone, wherein the total mass of the 1,4-sodium dihydro-anthraquinone sulfonate and the 1,4-potassium dihydro-anthraquinone sulfonate accounts for 70%-80% of the total mass of the catalyst, the 1,4-dihydroxy anthraquinone accounts for 10-20% of the total mass of the catalyst, the mass ratio of molybdenum oxide to nickel oxide to palladium oxide is 5:3.5:1.5, and the total mass of the threes oxides accounts for 4%-10% of the total mass of the catalyst. The oxidation desulphurization catalyst prepared by the method of the invention has the oxidation desulphurization effect similar to that of the existing hydrofining process, does not need means of high temperature, high pressure, hydrogen addition and the like, and achieves the purposes of reducing investment and lowering operational cost and technical risks.

Description

technical field [0001] The invention belongs to an oxidation desulfurization catalyst for reducing the sulfur content of diesel fraction and a preparation method thereof. Background technique [0002] With the growth of demand for light oil products, especially middle distillate oil, the proportion of diesel produced by catalytic cracking process is getting higher and higher. However, the diesel produced by the catalytic cracking process cannot meet the growth of middle distillate demand in terms of quantity or quality. With the promotion of clean diesel specifications, it is required that the content of sulfur, oxygen, nitrogen and aromatics in diesel fractions should be reduced as much as possible, and the cetane number should be continuously increased. Therefore, the diesel fraction must be saturated with olefins through hydrotreating, remove sulfur, nitrogen, and oxygen compounds, improve its stability, improve chroma, increase cetane number, reduce density, and reduce ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the hydrofining process is that the investment, operating costs and hydrogen consumption are relatively high, which cannot be afforded by ordinary small and medium-sized enterprises and ordinary investors.