Oxidation desulfuration method based on modified MCM-41 anchored heteropolyacid catalyst

Abstract

The invention discloses an oxidation desulfuration method based on modified MCM-41 anchored heteropolyacid catalyst, adopting hydrogen peroxide as oxygenant and modified MCM-41 anchored heteropolyacid as catalyst. The method comprises the following steps: proportionally mixing oil with acetonitrile solvent, proportionally adding the mixture of the oxygenant and the catalyst at certain temperature and normal pressure, cooling to room temperature after reaction, naturally layering, obtaining desulphurized oil products at the upper layer of oil phase, separating the catalyst in the lower layer (namely the acetonitrile phase) through filtration, and recycling. Compared with the traditional process, the method has the advantages of low production process, high safety of operation under normal pressure, strong desulfuration capability, saving of oxygenant and low production cost, and achieves efficient, economic and environment-friendly production process.

Description

technical field [0001] The invention relates to an oxidative desulfurization method based on a modified MCM-41 anchored heteropolyacid catalyst, which belongs to the interdisciplinary field of oil product deep processing and environmental protection technology in the petrochemical industry. Background technique [0002] SO formed during combustion of sulfur-containing oil X It is one of the precursors for the formation of acid rain in the atmosphere, and it is one of the main culprits that cause corrosive damage to buildings, extensive damage to plants and crops, and a series of environmental and health problems. Relevant studies have shown that to continuously and effectively reduce NO in automobile exhaust X The key is to reduce the sulfur content in the fuel, because sulfur can cause the poisoning effect of the catalyst of the motor vehicle exhaust purification device. At present, countries around the world have imposed strict restrictions on the sulfur content in fuel ...

AI Technical Summary

Problems solved by technology

There have been many in-depth research reports on the oxidative desulfurization technology using acetonitrile as the extraction agent, but there is still a large distance from the actual requirements. There are problems such as the catalyst is easily soluble in the acetonitrile phase, difficult to recycle or has certain toxicity, and high cost.

In short, the existing desulfurization process has problems such as difficult recycling of catalysts, large consumption of oxidants, difficulty in ensuring safety, and low economic benefits, which fundamentally limit industrial production applications.