Carrier style palladium amorphous alloy catalyst for hydrogenation of anthraquinone

An amorphous alloy, supported palladium technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of large loading of palladium, high palladium price, increased production cost of hydrogen peroxide, etc. Low volume, high activity effect

Inactive Publication Date: 2003-06-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of palladium is expensive, and the load of palladium is large, which increases the production cost of hy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Amorphous Alloy Catalyst Pd-B / γ-Al 2 o 3 Preparation: Weigh 0.88g of γ-Al 2 o 3 , roasted at 600°C for 3h, with 15mmol / L PdCl 2 The solution is impregnated in equal volume at 40°C, so that the content of palladium accounts for 0.01-0.15% of the total mass of the catalyst, dried at room temperature for 24 hours, and 1M KBH is added dropwise in an ice-water bath 4 The solution, when no gas was produced, was washed four times with water and absolute ethanol respectively, and stored in absolute ethanol. Activity evaluation results show that its hydrogenation efficiency can reach more than 8g / L.

Embodiment 2

[0015] Amorphous Alloy Catalyst Pd-B / γ-Al 2 o 3 + Preparation of mullite: γ-Al 2 o 3 Mechanically mix with mullite, the content of mullite is between 10%, calcined at 700°C for 3h, weigh 0.88g carrier, and use 10mmol / L PdCl 2 The solution was impregnated in equal volume at 50° C., and the rest of the steps were the same as in Example 1. The hydrogenation efficiency was above 7 g / L.

Embodiment 3

[0017] Amorphous Alloy Catalyst Pd-B-La / γ-Al 2 o 3 Preparation: use 0.01mol / L La(NO 3 ) 3 Solution impregnated γ-Al 2 o 3 , make the content of La account for 0.5% of the total mass, dry and bake at 700° C. for 3 h, weigh 0.88 g of the carrier, the rest of the steps are the same as in Example 2, and the hydrogenation efficiency is more than 8 g / L.

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PUM

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Abstract

A carried non-crystal Pd alloy catalyst for hydrogenating anthraquinone to prepare H2O2 is prepared from the carrier which is one or two of gamma-Al2O3, alpha-Al2O3, MgO, activated carbon, molecular sieve and mullite, non-crystal PdB alloy and RE element through immersing the carrier in the solution of RE metal's nitrate under ultrasonic condition, calcining at 400-700 deg.C for 2-5 hr, immersing in PdCl2 solution, dropping KBH4 solution in ice water bath, and washing. Its advantages are high catalytic activity and low cost.

Description

technical field [0001] The invention relates to a supported palladium series amorphous alloy catalyst for anthraquinone hydrogenation and a preparation method thereof. It belongs to catalyst preparation technology. Background technique [0002] The production of hydrogen peroxide by anthraquinone method is a method widely used at home and abroad, accounting for more than 95% of the total output. Among them, the hydrogenation catalyst is one of the key technologies for the production of hydrogen peroxide by the anthraquinone method, and its performance directly affects the progress of the entire production process. Catalysts with high activity and high selectivity can improve the unit cycle H 2 o 2 The yield and reduce the degradation of anthraquinone, thereby simplifying the process flow, improving the recycling rate of working fluid, reducing production costs and improving product quality. Therefore, this field has been one of the hotspots of d...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J29/06B01J37/00B01J37/16C01B15/023
Inventor 丁彤秦永宁马智齐晓周梁珍成廖巧丽
Owner TIANJIN UNIV
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