A kind of preparation method of highly dispersed loaded noble metal powder catalyst

Abstract

The invention discloses a preparation method of a highly dispersed and supported noble metal powder catalyst. The method comprises: 1. uniformly mixing the powdery carrier and deionized water to form a suspension; dissolving the noble metal precursor in deionized water to form a water Phase solution; 2. Add the suspension to the stirred tank type slurry reactor and stir to adjust the pH value of the suspension to be alkaline; 3. Add the aqueous phase solution to the stirred tank type slurry reaction after atomization In the container, the precious metal ions are precipitated in the form of precious metal precipitates, and are adsorbed and deposited on the surface of the powdery carrier in the suspension to form a uniform slurry; 4. The slurry is stirred and aged at a certain temperature, and the precious metal precipitates The compound is anchored on the surface of the powder carrier, and then the precious metal precipitate is reduced, filtered and washed to obtain a highly dispersed and loaded noble metal powder catalyst. The preparation process of the invention is simple and easy to control, and is suitable for industrial production of highly dispersed and loaded noble metal powder catalysts.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a preparation method of a highly dispersed and loaded noble metal powder catalyst. Background technique [0002] Highly dispersed and supported noble metal powder catalysts have the characteristics of high catalytic activity, good selectivity, and long cycle life. They are widely used in the fields of petrochemical, pharmaceutical, fine chemical, and organic synthesis, and play a very important role. Since 1875, the German E. Jacob established the first contact method device for the production of oleum in Kreuznach, and manufactured the required platinum catalyst, which is the pioneer of solid industrial catalysts. The precious metal platinum is the first industrial catalyst, and now precious metals are the catalytically active components in many important industrial catalysts. The highly dispersed and loaded noble metal powder catalyst is a kind of widely...

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Problems solved by technology

The preparation method can obtain highly uniform dispersion of the active metal component with a narrow particle size distribution range on the surface of the powder carrier, which effectively improves the preparation efficiency and effect of the supported noble metal powder catalyst, and solves the problem of the preparation of the production method in the prior art. Type noble metal powder catalysts have technical problems such as uneven distribution of active components, easy agglomeration, and difficulty in industrialization.

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