Fuel oil oxidative desulfurization method based on silica gel loaded with cesium salt catalyst of heteropoly acid

Abstract

The invention discloses an oil desulfurization method of the silica gel loaded with cesium salt catalyst of heteropoly acid and the method uses hydrogen peroxide as oxidant and the silica gel loaded with cesium salt of heteropoly acid as catalyst. The method comprises the following steps: oi and acetonitrile used as solvent are mixed according to a certain ratio, the mixture of the oxidant and the catalyst are added in the mixed solution at a certain temperature under the atmospheric pressure, the mixture is cooled to the room temperature after the reaction, then the reaction fluid is layered naturally, the upper oil phase is desulfurized oil, the lower layer is acetonitrile phase with the product and the catalyst, and the catalyst performs solid-liquid separation and is cleaned with acetonitrile, thus the catalyst can be recycled and reused. The catalyst used in the method has simple and safe preparation process, is non-toxic and harmless, has no pollution and can be recycled and reused. Compared with the traditional process, the process is simple, the catalyst can be recycled and directly reused, the desulfurization efficiency is high, the dosage of the oxidant is low and the method is suitable for industrial popularization and application.

Description

technical field [0001] The invention relates to a fuel oil oxidative desulfurization method based on a silica gel-loaded heteropolyacid cesium salt catalyst, and belongs to the interdisciplinary field of fuel oil deep processing and environmental protection technologies in the petrochemical industry. Background technique [0002] In recent years, with the increasingly stringent environmental protection requirements, the fuel sulfur content standards stipulated by countries around the world are also rapidly increasing. For example, according to the requirements of the US Environmental Protection Agency, from June 2006, refineries need to reduce the mass fraction of sulfur in gasoline from 400×10 -6 down to 30×10 -6 , the mass fraction of sulfur in highway diesel oil is from 500×10 -6 down to 15×10 -6 ; Other countries such as Australia, India and South Korea have also proposed roughly the same sulfur standards. At present, the mass fraction of sulfur in gasoline in my cou...

AI Technical Summary

Problems solved by technology

However, such processes have problems such as difficult recycling of catalysts or certain toxicity, large consumption of oxidants, difficulty in ensuring safety, and high costs, which fundamentally limit industrial production applications.