Method for removing sulfide in fuel oil by using modified polyethylene glycol

Abstract

The invention discloses a method for removing sulfide in fuel oil by using modified polyethylene glycol. The method comprises the following steps that S1, an appropriate amount of shale oil is taken and placed in a reaction kettle, the temperature of the reaction kettle is adjusted to be 50-60 DEG C, the shale oil is preherated until the shale oil is in a flowing state, an appropriate amount of zeolite is added, reduced-pressure distillation treatment is conducted, and an obtained diesel fraction serves as desulfurization raw oil; S2, an appropriate amount of the raw oil is taken and mixed with a solvent according to the mass ratio of 3:14, and the total sulfur content in the raw oil is measured separately; S3, a modified polyethylene glycol extraction agent is mixed with the raw oil in certain ratio, stirring is conducted at a certain temperature to make the raw oil in full contact with the extraction agent, liquid-liquid separation is conducted after standing stratification, the desulfurized fuel oil and an extraction phase are obtained, and the extraction phase is subjected to reduced-pressure distillation to obtain a regenerated extraction agent for recycling. The method for removing the sulfide in the fuel oil has the advantages that the desulfurization effect is ideal, the reaction conditions are mild, equipment is simple, no pollution is caused to the environment, and the industrial application prospects are very broad.

Description

technical field [0001] The invention belongs to the technical field of desulfurization of oil products, in particular to a method for removing sulfides in fuel oil by using modified polyethylene glycol. Background technique [0002] At present, the commonly used desulfurization methods include hydrodesulfurization, catalytic desulfurization, rectification desulfurization and adsorption desulfurization. Since hydrodesulfurization requires a hydrogen source, and the benzene ring of aromatics will be hydrogenated during hydrodesulfurization, the cost is high and the loss of aromatics raw materials is serious, so it is not suitable for aromatics desulfurization. The investment cost of rectification desulfurization equipment is high, and because some sulfides and aromatics form co-waste, the desulfurization accuracy cannot meet the process requirements. Adsorption desulfurization has the problem of low sulfur saturation capacity of the adsorbent and incomplete removal. CN101525...

AI Technical Summary

Problems solved by technology

Hydrodesulfurization requires a hydrogen source, and the benzene ring of aromatics will be hydrogenated in the process of hydrodesulfurization, so the cost is high and the loss of aromatics raw materials is serious, so it is not suitable for aromatics desulfurization

The investment cost of rectification desulfurization equipment is high, and because some sulfides and aromatics form co-waste, the desulfurization accuracy cannot meet the process requirements

Adsorption desulfurization has the problem of low sulfur saturation capacity of the adsorbent and incomplete removal

CN101525549A discloses a method for deep adsorption desulfurization and denitrification of hydrocracking tail oil, which comprises hydrocracking tail oil containing a certain amount of sulfides and nitrogen compounds and a deep adsorption desulfurization and denitrification agent for hydrocracking tail oil Contact at a certain temperature, pressure and space velocity to obtain the desulfurization, denitrogenation and hydrocracking tail oil after adsorption and refining. The sulfur and nitrogen content of the product meets the requirements of the raw material for hydroisomerization dewaxing, but this method has complex processes, equipment investment and operating costs. High, non-renewable issues