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Method for preparing platinum-rhenium reforming catalyst

A reforming catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, naphtha catalytic reforming, etc., can solve problems such as high cost of sulfidation agents, corrosion and toxicity of reaction equipment, and shorten the start-up Time, the effect of reducing operation steps

Active Publication Date: 2011-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are following problems in the presulfurization method of reforming catalyst: 2 Both S and organic sulfides are likely to cause corrosion of reaction equipment, causing equipment damage and potential safety hazards; (2) special pre-sulfurization equipment needs to be set up on industrial reforming units; Pollution to the environment; (4) The cost of vulcanizing agent is higher

Method used

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  • Method for preparing platinum-rhenium reforming catalyst

Examples

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example 1

[0030] The alumina support described in the present invention is prepared.

[0031] Add 200ml of deionized water into the gelling tank, heat to 60°C, and mix 200ml of aluminum sulfate solution (the concentration of aluminum sulfate solution in terms of alumina is 50g / L) and 140ml of sodium metaaluminate solution (aluminum meta The concentration of sodium aluminate solution in terms of alumina is 150g / L) into the gel-forming tank simultaneously, adjust the pH value of the reactant to 8.0 with sodium metaaluminate solution, neutralize and react for 30 minutes, then use sodium metaaluminate solution Adjust the pH value of the system to 10.0, and continue stirring and aging for 30 minutes. The main component of filtration and filter cake is pseudo-boehmite, which contains about 30g of alumina on a dry basis. The filter cake was subjected to slurry washing and filtration with deionized water for 6 times at 40° C., each water consumption was 600 ml, and the time was 30 minutes. Th...

example 2

[0033] The alumina carrier was prepared according to the method of Example 1, except that the filter cake obtained after aging was washed and filtered 8 times with deionized water, and the water consumption was 600 ml each time. The obtained pseudo-boehmite powder is extruded into strips, dried and roasted to obtain γ-Al 2 o 3 Carrier AS-3, where SO 4 2- The ion content was 0.18% by mass of alumina on a dry basis.

example 3

[0035] Prepare the alumina carrier according to the method of Example 1, except that the filter cake obtained after aging is washed and filtered 4 times at 50° C. with deionized water, and the water consumption is 600 ml each time, and the obtained pseudo-boehmite powder is extruded Forming, drying and roasting to obtain γ-Al 2 o 3 Carrier AS-4, where SO 4 2- The ion content was 0.22% by mass of alumina on a dry basis.

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Abstract

The invention discloses a method for preparing a platinum-rhenium reforming catalyst. The catalyst comprises an aluminum oxide carrier and the following active components using the carrier as calculation reference: 0.01 to 2.0 mass percent of platinum group metal, 0.01 to 3.0 mass percent of VIIB group metal, 0.1 to 3.0 mass percent of halogen and 0.1 to 0.3 mass percent of SO4<2->. The preparation method comprises the following steps of: (1) selecting aluminum sulfate as an aluminum source, regulating the pH value of the reaction system to be between 7.5 and 8.5, performing full reaction, regulating the pH value of the system to be between 9.5 and 10.5, ageing for 0.1 to 3.0 hours, and washing, drying and roasting solids to obtain the aluminum oxide carrier containing the SO4<2->; and (2) soaking the aluminum oxide carrier containing the SO4<2-> into impregnation solution containing the platinum group metal element, the VIIB group metal element and the halogen, and drying and roasting again; or soaking the aluminum oxide carrier containing the SO4<2-> into impregnation solution containing the VIIB group metal element, drying and roasting, then soaking the carrier into impregnation solution containing the platinum group metal element and the halogen, and drying and roasting again. The catalyst prepared by the method does not need pre-vulcanization before operation, so operation time and steps are reduced.

Description

technical field [0001] The invention is a method for preparing a reforming catalyst, in particular, a method for preparing a platinum-rhenium reforming catalyst. Background technique [0002] Catalytic reforming is an important process for the production of high-octane gasoline components and aromatics. At the same time, the by-product cheap hydrogen is used for oil hydrofinishing, upgrading, cracking, etc. In recent years, with the increasing social demand for reforming products, the production capacity of catalytic reforming units in the world has increased year by year, among which semi-regenerative reforming units occupy a very important position. [0003] At present, semi-regenerative reforming catalysts are mainly platinum-rhenium catalysts, of which metal rhenium has high hydrogenolysis activity. If it is not vulcanized, a strong hydrogenolysis reaction will occur at the initial stage of oil intake, releasing a large amount of reaction heat, making the catalyst bed T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13B01J27/053C10G35/09
Inventor 张大庆张玉红陈志祥臧高山王嘉欣
Owner CHINA PETROLEUM & CHEM CORP
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