Pretreatment method of desulfurization adsorbent and desulfurization method of sulfur-containing hydrocarbon feedstock

Abstract

The invention relates to a pretreatment method for desulphurization adsorbents. The pretreatment method comprises: desulphurization adsorbents and hydrocarbon raw materials containing alkenes are subjected to contact reaction under a non-hydrogen condition. The invention also relates to a desulphurization method for sulfur-containing hydrocarbon raw materials. The desulphurization method comprises: desulphurization adsorbents are pretreated according to the above method, and the pretreated desulphurization adsorbents are obtained; sulfur-containing hydrocarbon raw materials, hydrogen donors and the pretreated desulphurization adsorbents are subjected to contact reaction under an adsorption desulphurization reaction condition. The pretreatment method for desulphurization adsorbents takes an obviously short time, and when catalytic cracking gasoline with high content of alkenes is subjected to desulphurization, the pretreated desulphurization adsorbents obtained through the pretreatment method can prevent reactor temperature runaway phenomena caused by vast alkene saturation during the startup process effectively, and the startup difficulty is lowered.

Description

technical field [0001] The invention relates to a pretreatment method for a desulfurization adsorbent and a desulfurization method for sulfur-containing hydrocarbon raw materials. Background technique [0002] As people pay more and more attention to environmental protection, the restrictions on the sulfur content in light hydrocarbons used as fuels are becoming more and more stringent. Taking gasoline as an example, the European Union has stipulated that the sulfur content should not exceed 50 μg / g in 2005, and the Euro V gasoline standard planned to be implemented in 2010 stipulates that the sulfur content should be less than 10 μg / g. China's National III Standard, which was implemented on December 31, 2009, stipulates that the sulfur content of gasoline shall not exceed 150 μg / g, and plans to promote and implement the National IV Standard of gasoline sulfur content of not greater than 50 μg / g in 2014. [0003] The S-Zorb gasoline adsorption desulfurization process has be...

AI Technical Summary

Problems solved by technology

The method of this patent application needs to pre-sulfurize the adsorbent, and the pre-sulfurization process takes a long time, usually about 30 hours

[0004] Moreover, in the gasoline adsorption desulfurization process, when olefin-containing raw materials (such as catalytically cracked gasoline) are used as the start-up raw materials of the unit, a large amount of olefins will be saturated during the start-up stage, causing the reactor to overheat, and resulting in desulfurization products in the start-up stage The resistance index loss is larger

Images