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

Abstract

The invention discloses a preparation method of a platinum-rhenium reforming catalyst and the platinum-rhenium reforming catalyst. The method comprises: (1) contacting an alumina carrier with an active component solution containing a platinum compound and a rhenium compound, filtering, After drying, a dry sample is obtained; (2) the sodium alkyl xanthate solution with a pH of 7.5-9 is contacted with the dry sample, and after filtering, drying and roasting, a catalyst intermediate is obtained; (3) the catalyst The intermediate is contacted with a component solution containing a platinum-containing compound, a rhenium-containing compound and hydrochloric acid, and then dried and calcined. The method of the invention integrates the vulcanization process of the catalyst, avoids the catalyst from corroding equipment before use, and has a simple catalyst production process. In addition, the platinum-rhenium reforming catalyst prepared by the method of the present invention does not require a pre-sulfurization process of the catalyst before use, and has better catalytic performance than the sulfate-sulfurized catalyst.

Description

Technical field [0001] The invention relates to a method for preparing 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. At the same time, the by-product cheap hydrogen is used for oil hydrorefining, upgrading and cracking. In recent years, as the society’s demand for reformed products continues to rise, the world’s production capacity of catalytic reformers has increased year by year, among which semi-regenerative reformers occupy a very important position. The semi-regenerative reforming catalyst uses platinum rhenium catalyst, which is characterized by good stability and stable operation for a long period of time. [0003] The semi-regenerative reforming catalyst has developed from a single platinum catalyst to a platinum rhenium catalyst, which significantly improves the...

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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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