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Regular structure desulfurization catalyst and preparation method thereof, and sulfur-containing hydrocarbon desulfurization method

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: 2018-08-17
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 to realize, but it inevitably leads to an increase of the benzene content in gasoline; When the sulfur 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 and preparation method thereof, and sulfur-containing hydrocarbon desulfurization method
  • Regular structure desulfurization catalyst and preparation method thereof, and sulfur-containing hydrocarbon desulfurization method

Examples

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preparation example Construction

[0025] At the same time, the present invention also provides a method for preparing a desulfurization catalyst with a regular structure, the preparation method comprising the following steps: S1, a precursor of an oxide of at least one metal selected from groups IIA and IIB, optionally The rare earth oxide precursor and the non-aluminum binder precursor 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 slurry in the regular structure carrier Forming a matrix coating on the surface and / or the outer surface to obtain a catalyst carrier; S3, contacting the catalyst carrier with a transition metal precursor solution, drying and roasting to form a transition metal oxide on the matrix coating Material, obtain catalyst precursor; S4, described catalyst precursor in CH 4 / H 2 Reduction treatment is carried out under the atmosphere to reduce the transition metal oxide to form t...

Embodiment 1

[0062] This example is used to illustrate the regular structure desulfurization catalyst and its preparation method of the present invention.

[0063] (1) Preparation of substrate coating slurry:

[0064] Mix 1.01kg of nano-zinc oxide powder (Beijing Chemical Plant, containing 1.0kg of zinc oxide on a dry basis) and 1L of deionized water, and wet ball mill to obtain slurry A (mixture particle size d 900.356kg of zirconium tetrachloride (Beijing Chemical Plant, analytically pure, 0.188kg in terms of zirconia) was slowly added to the nitric acid solution of 3.1kg of concentration 10% by weight until the solution pH value was 2, and Stir slowly to avoid the precipitation of zirconia crystals, and obtain a colorless and transparent zirconium sol; add 0.0625 kg of lanthanum oxide (Sinopharm Group, analytically pure, containing 0.062 kg on a dry basis) to the aforementioned zirconium sol, stir and mix evenly, and then add 25% by weight dropwise Ammonia solution until the pH value i...

Embodiment 2

[0074] This example is used to illustrate the regular structure desulfurization catalyst and its preparation method of the present invention.

[0075] (1) Preparation of substrate coating slurry:

[0076] Mix 1.01kg of nano-zinc oxide powder (Beijing Chemical Plant, containing 1.0kg on a dry basis of zinc oxide) and 1L deionized water, and wet ball mill (mixture particle size d 90 8 μm), to obtain slurry A; 1.19kg of titanium tetrachloride (Beijing Chemical Plant, analytically pure, 0.5kg in terms of titanium oxide) was slowly added to 0.76kg of 25% by weight ammonia solution to the pH of the solution 0.322 kg of cerium nitrate (Beijing Chemical Plant, analytically pure, 0.17 kg in terms of cerium oxide) was added to the aforementioned titanium sol, stirred and mixed After uniformity, 25% by weight of ammonia solution was added dropwise until the pH value was greater than 10 to form a cerium-titanium sol to obtain slurry B; the slurry A and slurry B obtained above were mixed ...

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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 carbide and 30-95 wt% of a matrix, and the matrix comprises, by weight, 5-35 wt% of a non-aluminum binder, 0.5-10 wt% of a rare earth oxide, and 60-90 wt% of the oxide of at least a metal selected from group IIA and group IIB. The catalyst of the present invention has good desulfurization activity and good desulfurization stability, and can improve the octane number of thedesulfurized 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 Applications(China)
IPC IPC(8): B01J27/22C10G45/04C10G45/06
CPCB01J27/22C10G45/04C10G45/06C10G2300/202
Inventor 王鹏田辉平孙言宋海涛朱玉霞任飞
Owner CHINA PETROLEUM & CHEM CORP
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