Loaded palladium catalyst and preparing method and its use

A supported palladium and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, catalyst carrier, etc., can solve the problems of flammability of Raney nickel catalyst, complex reactor structure, serious environmental pollution, etc. Industrial scale-up production, easy industrial scale-up production, high hydrogenation effect

Inactive Publication Date: 2006-03-22
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the supported noble metal palladium catalyst has high activity, but is expensive, while the Raney nickel catalyst has disadvantages such as flammability, complex reactor structure, and serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take PdCl with a Pd content of 0.01g / ml 2 (PdCl 1 2 , Shanghai Xinghua Precious Metal Factory) solution 6ml was diluted to 70ml with distilled water, added 10g TH (produced by Tianjin Research Institute of Chemical Industry) carrier, stirred and impregnated at room temperature for 4h, suction filtered, and the filter cake was dried naturally in the air, and then baked at 120°C Dry for 3 hours, and finally bake in a muffle furnace at 600°C for 3 hours to obtain a PdO / TH catalyst. The catalyst is used for the hydrogenation reaction of anthraquinone, the reaction conditions are as above, and the reaction results are shown in Table 1.

Embodiment 2

[0020] According to the preparation steps in Example 1, the sample was dried at 120°C and beaten in an ice-salt bath, and KBH was added dropwise under the protection of Ar gas. 4 Solution, KBH 4 The ratio to the amount of Pd substance is 5:1. When no more gas was released from the slurry, the obtained black solid was repeatedly washed with distilled water and stored in ethanol to obtain a Pd / TH catalyst. Its catalytic performance is shown in Table 1.

Embodiment 3

[0022] Take H with a Pd content of 0.01g / ml 2 PdCl 4 Dilute 3ml of the complex solution to 70ml with distilled water, add 0.2mol / L NaOH solution dropwise to adjust the pH value of the solution to 5, add PdCl 2 The β-CD powder with a mass ratio of 1:1 was stirred at room temperature for 4 hours to prepare a Pd-β-CD colloidal solution. Add 10 g of TH carrier to the colloidal solution, stir for 2 h and then filter with suction. The filter cake was air-dried naturally at 100°C for 3 hours to obtain the Pd-β-CD / TH-1 catalyst. The corresponding reaction results are shown in Table 1.

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Abstract

The present invention belongs to the field of the preparation of palladium catalyst, and is especially supported palladium catalyst and its preparation process and application. The supported palladium catalyst is noble metal palladium supported onto nanometer alumina fiber carrier and has the supported amount of palladium as the active component in 0.1-1 wt%. The nanometer alumina fiber carrier is gamma-alumina fiber, and the noble metal palladium is supported onto the nanometer alumina fiber carrier through equal volume soaking process. The high dispersive supported palladium catalyst is used in hydrogenating anthraquinone to prepare hydrogen peroxide solution, has high hydrogenating effect and mild reaction condition, and suitable for industrial production.

Description

technical field [0001] The invention belongs to the preparation of a palladium catalyst, in particular to a supported palladium catalyst, a preparation method and an application thereof. The novel high-dispersion supported palladium catalyst is used for anthraquinone hydrogenation to prepare hydrogen peroxide. Background technique [0002] Noble metal catalysts are widely recognized for their excellent catalytic performance, but the resources of noble metals are limited and the cost is high. How to improve the utilization rate of noble metal catalysts and reduce the cost has become the focus of researchers at home and abroad. Among them, maximizing the dispersion of noble metal active centers and reducing the size of active centers has become one of the most important solutions. Hydrogen peroxide is an important chemical raw material. Since hydrogen peroxide is decomposed to produce water and oxygen, it has no secondary pollution to the environment and is a green chemical,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J21/04B01J32/00B01J35/06B01J37/02
Inventor 陶克毅李伟张明慧王寰张雪军
Owner NANKAI UNIV
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