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Supported noble metal hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and noble metal technology, applied in the field of supported noble metal hydrogenation catalyst and its preparation, to achieve the effects of simple preparation method, high specific surface area and strong adsorption

Active Publication Date: 2012-08-01
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Hydrogenation catalysts supported by noble metals on mixture supports have not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The supported noble metal hydrogenation catalyst of this embodiment is composed of a noble metal active component and a carrier, and the carrier is a mixture of 200 mesh activated carbon powder and 200 mesh γ-alumina powder, wherein the mass percentage of activated carbon powder in the mixture is 30%, the mass percentage of γ-alumina powder is 70%; the noble metal is platinum; the mass percentage of noble metal in the catalyst is 5%.

[0024] In addition, the present invention also provides a method for preparing a supported noble metal hydrogenation catalyst, characterized in that the method comprises the following steps:

[0025] Step 1. Reflux the 200-mesh activated carbon powder with nitric acid with a mass concentration of 5% for 3 hours, then wash it with pure water until the pH of the washing solution is neutral, and dry it for later use; Heat treatment at ℃ for 4h, cool to room temperature and set aside;

[0026] Step 2, get 100mL platinum concentration and be ...

Embodiment 2

[0029] This embodiment is the same as Example 1, except that the noble metal is palladium, ruthenium or rhodium, and the corresponding water-soluble platinum-based noble metal compound is palladium chloride, ruthenium trichloride or rhodium trichloride; The heat treatment temperature of the γ-alumina powder is 850° C., and the heat treatment time is 3 hours.

Embodiment 3

[0031] The supported noble metal hydrogenation catalyst of this embodiment is composed of noble metal active components and a carrier, the carrier is a mixture of 500 mesh activated carbon powder and 300 mesh light calcium carbonate powder, wherein the mass percentage of activated carbon powder in the mixture is 30%, the mass percentage of light calcium carbonate powder is 70%; the precious metal is platinum; the mass percentage of precious metal in the catalyst is 1%.

[0032] In addition, the present invention also provides a method for preparing a supported noble metal hydrogenation catalyst, characterized in that the method comprises the following steps:

[0033] Step 1. Reflux the 500-mesh activated carbon powder with nitric acid with a mass concentration of 25% for 1 hour, then wash with pure water until the pH of the washing solution is neutral, and dry it for later use; 300-mesh light calcium carbonate powder with a temperature of 70 Soak in pure water at ℃ for 4 times...

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PUM

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Abstract

The invention discloses a supported noble metal hydrogenation catalyst which is composed of a noble metal active component and a support. The invention is characterized in that the support is the mixture of one or more of gamma-aluminum oxide powder, light calcium carbonate powder and barium sulfate powder with activated carbon powder, wherein the activated carbon powder accounts for 20-60 wt% of the mixture; the noble metal is one of platinum noble metals; and the noble metal accounts for 1-10 wt% of the catalyst. The invention also discloses a preparation method of the supported noble metal hydrogenation catalyst. The support, which is the mixture of one or more of gamma-aluminum oxide powder, light calcium carbonate powder and barium sulfate powder with activated carbon powder, not only has the characteristics of developed pore structure, high specific area and strong adsorptivity of the activated carbon, but also has the characteristics of other oxide or salt supports.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a supported noble metal hydrogenation catalyst and a preparation method thereof. Background technique [0002] Because the d electron orbitals of noble metal catalysts are not filled, the surface is easy to adsorb reactants, and the strength is moderate, which is conducive to the formation of intermediate "active compounds", has high catalytic activity, and also has comprehensive advantages such as high temperature resistance, oxidation resistance, and corrosion resistance. properties and become the most important catalytic material. Supported noble metal catalysts are insoluble solids, and their main form is noble metal particles supported by porous inorganic carriers, such as Pt / Al 2 o 3 , Pd / C, Rh / SiO 2 、Pt-Pd / Al 2 o 3 Wait. In the process of catalytic reaction, most of them belong to heterogeneous catalytic reaction. Due to their irreplaceable ...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/44B01J23/46B01J27/232B01J35/10C07D211/02
Inventor 曾永康曾利辉李岳峰张之翔文永忠
Owner XIAN CATALYST NEW MATERIALS CO LTD
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