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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

[0028] 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, silicon oxide source and alumina source 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 for...

Embodiment 1

[0064] This example is used to illustrate the regular structure desulfurization catalyst and its preparation method of the present invention.

[0065] (1) Pretreatment of alumina source:

[0066] Mix 0.31kg of pseudo-boehmite (produced by Shandong Aluminum Plant, with a solid content of 65% by weight, containing 0.2kg of alumina, with an average particle size of 35nm, the same below) and 2kg of deionized water (pH=7, the same below) Mix and beat evenly, add 100mL of hydrochloric acid with a concentration of 18wt% dropwise, adjust the pH value of the slurry to 1.8 to make the slurry in a gel state, and age at 60°C for 1 hour to obtain pretreated pseudo-boehmite.

[0067] (2) Preparation of catalyst support:

[0068]Add 1.22kg of zinc oxide powder (produced by Beijing Chemical Factory, the average particle size is 75nm; containing 1.2kg on a dry basis, the same below) and 0.25kg of kaolin (Suzhou kaolin) in the aforementioned pretreated pseudo-boehmite obtained Factory product...

Embodiment 2

[0076] This example is used to illustrate the regular structure desulfurization catalyst and its preparation method of the present invention.

[0077] (1) pretreatment of alumina source: with embodiment 1;

[0078] (2) Preparation of catalyst support:

[0079] Add 3.46kg of zinc oxide powder (containing dry basis 3.4kg) and 0.5kg kaolin (containing dry basis 0.4kg) and fully mix and stir in the pretreated pseudo-boehmite (containing alumina 0.2kg) obtained above, Then use ball mill wet grinding 5h (ball mill liquid is distilled water) to prepare the slurry (mixture particle d) that solid content is 30% by weight 90 8 μm), and then coated on a 1.18kg cylindrical honeycomb-shaped cordierite carrier, then dried the coated carrier at 100°C for 150min, then fired at 500°C for 240min, and repeated the above coating, drying and roasting The step of obtaining the catalyst carrier of 1.33kg.

[0080] (3) Preparation of catalyst precursor:

[0081] Mix the cobalt nitrate solution wi...

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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 alumina, 5-35 wt% of a silica source, and 30-90 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 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 Applications(China)
IPC IPC(8): B01J27/22C10G45/04C10G45/06
CPCB01J27/22C10G45/04C10G45/06C10G2300/202C10G2400/02
Inventor 田辉平王鹏王振波孙言宋海涛许明德
Owner CHINA PETROLEUM & CHEM CORP
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