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Regular structure desulfurization catalyst, preparation method thereof, and method for desulfurization of sulfur-containing hydrocarbons

A technology of desulfurization catalyst and regular structure, which is applied in the field of desulfurization of sulfur-containing hydrocarbons. It can solve the problems of desulfurization activity and desulfurization stability, affect the implementation effect of desulfurization of sulfur-containing hydrocarbons, and reduce the octane number of gasoline products, so as to increase the stability of desulfurization. non-toxic, not easy to lose and aggregate, and improves the effect of octane number

Active Publication Date: 2020-08-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorbent at 0.1~10.3MPa, 37.7~537.7℃, weight hourly space velocity 0.5~50h -1 Under the conditions of hydrogenation and hydrogenation, the sulfur in the oil is captured on the adsorbent and combined with zinc oxide after hydrogenation. At the same time, due to the hydrogenation effect of transition metals on olefins, the octane number of gasoline products will decrease.
In order to make up for the loss of octane number due to the reduction of olefins, the prior art usually adopts the method of promoting the aromatization reaction and increasing the content of aromatics, but this inevitably leads to an increase in the content of benzene in gasoline.
In addition, when the sulfur bound on the zinc oxide reaches saturation, the desulfurization activity will decrease, and the sulfur must be removed through oxidation regeneration.
In the frequent oxidation regeneration-reduction process, metals as active components will aggregate, and zinc oxide will be converted into zinc silicate and zinc aluminate during the regeneration process, which will reduce the desulfurization activity of the adsorbent during recycling. , the deactivation rate of the adsorbent is high, which affects the implementation effect of desulfurization of sulfur-containing hydrocarbons
[0006] It can be seen that although adsorption desulfurization can achieve deep desulfurization well, there are still problems in desulfurization activity and desulfurization stability in practical applications.

Method used

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  • Regular structure desulfurization catalyst, preparation method thereof, and method for desulfurization of sulfur-containing hydrocarbons
  • Regular structure desulfurization catalyst, preparation method thereof, and method for desulfurization of sulfur-containing hydrocarbons

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preparation example Construction

[0024]At the same time, the present invention also provides a method for preparing a desulfurization catalyst with a regular structure, which includes the following steps: S1, a precursor of an oxide of at least one metal selected from groups IIA and IIB and silicon oxide Binder precursors are mixed to prepare a matrix coating slurry; S2, coating the matrix coating slurry on a regular structure carrier, drying and firing to form a matrix coating on the inner surface and / or outer surface of the regular structure carrier layer to obtain a catalyst carrier; S3, contacting the catalyst carrier with a transition metal precursor solution, drying and roasting after contact to form a transition metal oxide on the substrate coating to obtain a catalyst precursor; S4, The catalyst precursor in NH 3 / H 2 Reduction treatment is carried out under the atmosphere to reduce the transition metal oxide to form transition metal nitride to obtain the regular structure desulfurization catalyst. ...

Embodiment 1

[0057] This example is used to illustrate the regular structure desulfurization catalyst and its preparation method of the present invention.

[0058] (1) Preparation of substrate coating slurry:

[0059] Mix 1.01kg of zinc oxide powder (produced by Beijing Chemical Plant, containing 1kg on a dry basis) and 1kg of deionized water, and wet ball mill to obtain a grinding slurry (particle size d 90 =8 μm); add 1.67kg water glass (produced by Sinopec Catalyst Qilu Branch Company, the modulus is 3.2, the average particle size is 30nm, containing 0.25kg silicon oxide) in the aforementioned grinding slurry, stir for 10min, add 500mL polyethylene glycol Solution (prepared based on the addition of 2 g of polyethylene glycol per 100 mL of water, wherein polyethylene glycol is produced by Aladdin Reagent Company, the degree of polymerization is 1700, analytically pure, the same below), stirred for 20 minutes to obtain a solid content of 30 wt. % matrix coating slurry;

[0060] (2) Prep...

Embodiment 2

[0069] This example is used to illustrate the regular structure desulfurization catalyst and its preparation method of the present invention.

[0070] (1) Preparation of substrate coating slurry:

[0071] 1.53kg of zinc oxide powder (produced by Beijing Chemical Plant, containing 1.5kg on a dry basis) and 1kg of deionized water are mixed uniformly, and wet ball milled to obtain a grinding slurry (particle size d 90= 8 μm); add 0.68kg of silica sol (produced by Sinopec Catalyst Qilu Branch, containing 0.17kg of silicon dioxide) to the aforementioned grinding slurry, stir for 10min, then wet mill for 5h with a ball mill, then add 375mL of polyethylene glycol solution (based on Prepared by adding 2 g of polyethylene glycol per 100 mL of water, wherein the polyethylene glycol is produced by Aladdin Reagent Company, the degree of polymerization is 1700, analytically pure, the same below), and stirred for 20 minutes to obtain a matrix with a solid content of 30% by weight coating s...

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Abstract

The invention discloses a regular structure desulfurization catalyst and a preparation method thereof, and a sulfur-containing hydrocarbon desulfurization method. The catalyst comprises a regular structure carrier and an active component coating distributed on the inner surface and / or outer surface of the regular structure carrier, wherein the active component coating comprises, by weight, 5-70 wt% of a transition metal nitride and 30-95 wt% of a matrix, and the matrix comprises, by weight, 70-90 wt% of the oxide of at least a metal selected from group IIA and group IIB, and 10-30 wt% of silicon oxide. The catalyst of the present invention has good desulfurization activity and good desulfurization stability, and can improve the octane number of the desulfurized oil product.

Description

technical field [0001] The invention relates to the field of desulfurization of sulfur-containing hydrocarbons, in particular to a regular structure desulfurization catalyst, a preparation method thereof and a method for desulfurization of sulfur-containing hydrocarbons. Background technique [0002] Sulfur in vehicle fuel produces sulfur oxides after combustion. This substance will inhibit the activity of the precious metal catalyst in the automobile exhaust converter and cause it to be irreversibly poisoned, and cannot realize the catalytic conversion of toxic gases in the automobile exhaust, resulting in the unburned non-methane hydrocarbons and nitrogen in the automobile exhaust. oxides and carbon monoxide. These toxic gases are easily catalyzed by sunlight to form photochemical smog and cause acid rain. And sulfur oxide itself is also one of the main causes of acid rain. [0003] As people pay more and more attention to environmental protection, environmental regulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/04C10G45/04
CPCB01J27/24B01J35/04C10G45/04C10G2300/202
Inventor 田辉平孙言王鹏宋海涛许明德王振波
Owner CHINA PETROLEUM & CHEM CORP
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