C4 hydrocarbon deep desulfurization method and thiol and disulfide removal agent used therein

A disulfide and deep desulfurization technology, applied in the field of desulfurization, can solve the problems of reducing the adsorption capacity of molecular sieve adsorbents for mercaptans and disulfides, the demercaptan rate cannot be removed, and only pay attention to local areas, etc., so as to improve quality and save energy. Time, the effect of improving the adsorption capacity

Active Publication Date: 2009-12-02
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mercaptan removal rate of the above mercaptan adsorbents cannot reach the level of removing 1000ppm of mercaptan in the inlet gas to 0.05ppm
Moreover, for C4 hydrocarbons, which contain a certain amount of water, if the C4 hydrocarbons are not dehydrated in advance and then directly passed through the above-mentioned molecular sieve adsorbent for sweetening and disulfide treatment, the above-mentioned molecular sieve adsorbent will first adsorb C4 hydrocarbons Moisture in the water, thereby reducing the adsorption capacity of molecular sieve adsorbents for mercaptans and disulfides
[0008] In addition, at present, in the prior art, corresponding to H in C4 hydrocarbons 2 The removal of S, COS, mercaptan, and disulfide impurities only focuses on parts, or only removes H 2 S and COS, or only remove mercaptans; there is no relevant information about the H contained in C4 hydrocarbons in the prior art. 2 A report on the continuous and systematic removal of impurities such as S, COS, mercaptans and disulfides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, n-butene containing 30ug / g hydrogen sulfide, 40ug / g carbonyl sulfide, 100ug / g mercaptan, and 100ug / g disulfide sulfur is used. The processing steps include: 1. select 10g crosslinking Polyacrylate is used as the dehydrating agent, and it is filled into the dehydrating reactor, the reaction temperature in the reactor is set to 30°C, the pressure is 1.0Mpa, and the space velocity through the dehydrating agent bed is 3.0h -1 , carry out dehydration treatment to n-butene raw material; ② Weigh 30g carbonyl sulfide hydrolysis catalyst, this hydrolysis catalyst is made of K 2 O and carrier r-Al 2 o 3 composition, wherein the active component content is 1wt% of the total weight of the hydrolysis catalyst, the hydrolysis catalyst is filled into the carbonyl sulfide hydrolysis reactor, and the reaction temperature of the reactor is set to be 30°C, the pressure is 1.0Mpa, and the carbonyl The space velocity of the sulfur hydrolysis catalyst bed is 1.0h -1 , ...

Embodiment 2

[0025] In this embodiment, n-butene containing 30ug / g hydrogen sulfide, 40ug / g carbonyl sulfide, 100ug / g mercaptan, and 100ug / g disulfide sulfur is used. Vinyl alcohol is used as a dehydrating agent, and it is filled into the dehydrating reactor, the reaction temperature in the reactor is set to 30°C, the pressure is 1.0Mpa, and the space velocity through the dehydrating agent bed is 3.0h -1 , carry out dehydration treatment to n-butene raw material; ② Weigh 30g carbonyl sulfide hydrolysis catalyst, this hydrolysis catalyst is made of K 2 O and TiO 2 Modified r-Al 2 o 3 Composite carrier composition, wherein the active component content is 10wt% of the total weight of the hydrolysis catalyst, the hydrolysis catalyst is filled into the carbonyl sulfide hydrolysis reactor, and the reaction temperature of the reactor is set to 30 ° C, the pressure is 1.0Mpa, The space velocity through the carbonyl sulfide hydrolysis catalyst bed is 1.0h -1 , to hydrolyze the carbonyl sulfide ...

Embodiment 3

[0027] In this embodiment, n-butene containing 30ug / g hydrogen sulfide, 40ug / g carbonyl sulfide, 100ug / g mercaptan, and 100ug / g disulfide sulfur is used. The processing steps include: 1. select 60g polypropylene Amide is used as a dehydrating agent, and it is filled into the dehydration reactor, the reaction temperature in the reactor is set to 10°C, the pressure is 0.3Mpa, and the space velocity through the dehydrating agent bed is 0.5h -1 , dehydrate the n-butene raw material; ② Weigh 60g carbonyl sulfide hydrolysis catalyst, the hydrolysis catalyst is made of K 2 O, MgO and TiO 2 Modified r-Al 2 o 3 Composite carrier composition, wherein active component content is 15wt% of this hydrolysis catalyst gross weight, this hydrolysis catalyst is filled in the carbonyl sulfide hydrolysis reactor, and setting the reaction temperature of this reactor is 10 ℃, and pressure is 0.3Mpa, The space velocity through the carbonyl sulfide hydrolysis catalyst bed is 0.5h -1 , to hydrolyze...

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PUM

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Abstract

The invention relates to a thiol and disulfide removal agent which is an X molecular sieve exchanged from positive ions Cs<+>, Mg<2+>, La<3+>, Ce<3+>, Cu<2+>, Zn<2+>, Mn<2+> or a Y molecular sieve exchanged from positive ions Cs<+>, Mg<2+>, La<3+>, Ce<3+>, Zn<2+>, Mn<2+>.The invention further discloses a C4 hydrocarbon deep desulfurization method which adopts the thiol and disulfide removal agent, in the invention, removal is carried out continuously and systematically on H2S, COS, thiol and disulfide in the C4 hydrocarbon; the method is easy to operate; C4 hydrocarbon can be refined to ensure that total sulfer therein is less than 0.5ppm and the carbonyl sulfide is less than 0.05ppm.

Description

technical field [0001] The invention relates to a mercaptan and disulfide removing agent and a C4 hydrocarbon deep desulfurization method using the water-absorbing removing agent, belonging to the technical field of desulfurization. Background technique [0002] C4 hydrocarbons are a general term for monoolefins (n-butene and isobutene), dienes (butadiene), and alkanes (n-butane and isobutane). Major sources of C4 hydrocarbons include catalytic cracking products and steam cracking products (also including ethylene cracking by-products). [0003] The above-mentioned C4 hydrocarbons are widely used in industrial production, among which, the C4 hydrocarbons produced by catalytic cracking are mainly used for the production of alkylated gasoline and composite gasoline, and can be used as civil fuels; while the C4 hydrocarbons produced by steam cracking are obtained by extraction Butadiene can be used not only as raw material for synthetic rubber, but also as fuel. Later, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/13B01J20/18
Inventor 汪祥胜吴志强苏利鹏
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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