A kind of preparation method of platinum-rhenium reforming catalyst and platinum-rhenium reforming catalyst

Abstract

The invention discloses a preparation method for a platinum-rhenium reforming catalyst and the platinum-rhenium reforming catalyst. The method comprises the following steps: (1) contacting a sodium alkyl xanthate solution with pH of 7.5-9 with an aluminium oxide carrier, and performing filtering and drying, so as to obtain a dried sample; (2) contacting the dried sample with a first active composition solution, and performing drying and roasting, so as to obtain a catalyst intermediate; and (3) contacting the catalyst intermediate with a second active composition solution, and performing drying and roasting. In the method, a sulfuration process of the catalyst is fused, corrosion of the catalyst in the sulfuration process on equipment is avoided before the catalyst is used, and the catalyst production technology is simple, and preparation cost is low. Additionally, the platinum-rhenium reforming catalyst prepared according to the method does not need a pre-sulfuration process before being used, and possesses relatively good catalytic performance compared with a sulfate-sulfurized catalyst.

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 agents; (5) prolonging the 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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