Preparation method for platinum and rhenium reforming catalyst and platinum and rhenium reforming catalyst

Abstract

The invention discloses a preparation method for a platinum and rhenium reforming catalyst and a platinum and rhenium reforming catalyst. The method comprises the steps of: (1) contacting an aluminium oxide carrier with an active ingredient solution containing a platinum compound and a rhenium compound and filtering and drying the mixture to obtain a dried sample; (2) contacting an alkyl sodium xanthate solution with the pH of 7.5-9 with the dried sample and filtering, drying and roasting the mixture to obtain a catalyst intermediate; and (3) contacting the catalyst intermediate with the ingredient solution containing the platinum compound, the rhenium compound and hydrochloric acid, and then drying and roasting the mixture. The method disclosed by the invention integrates a vulcanization process of the catalyst, so that corrosion on equipment before the catalyst is used. The catalyst is simple in production process. In addition, the platinum and rhenium reforming catalyst prepared by the method is free of pre-vulcanization process of the catalyst before the catalyst is used, and compared with a catalyst which is vulcanized by sulfate radicals, the catalyst has a better catalytic performance.

Description

technical field [0001] The invention relates to a preparation method of a platinum-rhenium reforming catalyst and a platinum-rhenium reforming catalyst prepared by the preparation method. Background technique [0002] Catalytic reforming is an important process for the production of high-octane gasoline components and aromatics, while the by-product cheap hydrogen is used for oil hydrofinishing, upgrading and cracking. 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. The semi-regenerative reforming catalyst uses platinum-rhenium catalyst, which is characterized by good stability and long-term stable operation. [0003] The development of semi-regenerative reforming catalysts from single platinum catalysts to platinum-rhenium catalysts has significantly improved the stability of...

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Problems solved by technology

[0006] However, Mao Xuejun et al. (Acta Petroleum Sinica (Petroleum Processing), 2000, Vol. 16, No. 2, P25-32) found that the formation of sulfate radicals on the platinum-rhenium reforming catalyst not only inhibited the acidic and metallic functions of the catalyst, but also accelerated the The inactivation rate of the aromatization activity and selectivity is greatly reduced

[0007] As can be seen from the above, there are following problems in the presulfidation method of reforming catalyst: (1) whether the sulfidation agent added in the sulfide process is H 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) higher cost of vulcanizing agent; (5) extended start-up time

For the sulfate radical in the reforming catalyst, it is generally believed that it will damage the performance of the catalyst and is a poison to the catalyst.

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