Compound desulfurizer and preparation method thereof

Abstract

The invention discloses a compound desulfurizer which comprises the following components by weight part: 5-10 parts of zinc oxide grains, 8-6 parts of calcium oxide, 6-8 parts of sodium carbonate, 4-6 parts of alkaline aluminum sulfate, 5-8 parts of coke, 4-6 parts of calcium fluoride, 5-8 parts of cocoanut active charcoal, 4-8 parts of modified attapulgite, 5-8 parts of auxiliary adsorbing components, 2-6 parts of a pore-enlarging agent, 4-5 parts of aluminum oxide, 4-10 parts of manganese oxide grains and 5-8 parts of a catalyst. The compound desulfurizer according to the technical scheme of the invention can be used for desulfurizing to below 1ppm and has the advantages that the adsorbing sulfur capacity is large, the operation cost is low, no pollution exists and the service life is long; the preparation method is simple in technique, is low in cost, is fit for industrial production and is free from generation of harmful matter.

Description

technical field [0001] The invention relates to the technical field of desulfurizers, in particular to a desulfurizer capable of [0002] Composite desulfurizer with higher catalytic activity and preparation method thereof. Background technique [0003] About 70% of my country's commercial gasoline comes from the heavy oil catalytic cracking process. Since heavy oil raw materials contain a large amount of sulfur, nitrogen, oxygen heteroatom compounds and colloidal asphaltenes, catalytic cracking gasoline not only has a high sulfur content, but also contains a large amount of olefin components , More than 90% of the sulfur in commercial gasoline comes from catalytic cracking gasoline, which makes the sulfur content of gasoline in my country far exceed that in foreign gasoline. Therefore, how to reduce the sulfur content in FCC gasoline is the key to reducing the sulfur content in commercial gasoline. [0004] The sulfides in petroleum generate hydrogen sulfide, elemental sul...

AI Technical Summary

Problems solved by technology

Due to the large amount of olefins in the secondary processed oil, a large number of side reactions will occur after alkali washing, catalytic oxidation, etc., which will affect the quality of the oil

[0008] 1. Desulfurization depth is not enough;

[0009] 2. The specific surface area of ​​the adsorbent is low, and the adsorption sulfur capacity is relatively limited;

[0010] 3. The operating conditions of the desulfurization process are harsh and consume a lot of energy, resulting in high operating costs;

[0011] 4. The desulfurization process is not friendly to the environment;

[0012] 5. The selectivity of the desulfurizer is low and the service life is short;

[0013] 6. The process of regeneration of desulfurizer is complex

So far, there is no adsorption desulfurizer that can overcome the above-mentioned shortcomings.