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Preparation method of a novel hydrogenation and dechlorination catalyst

A technology for hydrodechlorination and catalysts, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc.

Inactive Publication Date: 2007-08-01
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, a large number of literatures have reported that bimetallic catalysts have hydrogenation activity and selectivity unmatched by monometallic catalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0014] These examples illustrate the preparation of unsupported NiPd bimetallic catalysts.

[0015] 0.05g of PdCl 2 Dissolve in the NaCl solution of 50ml 4mol / L, then add the NiB amorphous alloy (controlling that Pd accounts for 1% of the weight of the catalyst) with a cluster size of 25nm, stir until the Pd ion is completely replaced by elemental Ni, and the product is washed with centrifuged water To neutral, crystallize at 200°C for 2.0h after drying. Catalyst A is obtained.

[0016] Same as the preparation process of catalyst A, change the NiB amorphous alloy of about 25nm into 10nm NiB amorphous alloy, 250nmNiB amorphous alloy, 5nm nano-nickel powder and 100nm nano-nickel powder to obtain catalysts B-E.

[0017] Same as catalyst A preparation process, change PdCl 2 The addition amount of Pd is controlled to account for 0.1% and 5% of the catalyst weight respectively, and catalysts F and G are obtained.

[0018] In the same way as the preparation process of catalyst A,...

Embodiment 13～15

[0021] These examples illustrate the preparation of supported NiPd bimetallic catalysts.

[0022] During the preparation of catalyst A, add 9gAl 2 o 3 After the carrier was evenly stirred, the product was washed with centrifuged water until neutral, dried and crystallized at 200°C for 2.0 hours. Catalyst L is obtained.

[0023] The catalyst M was obtained by changing the carrier to coconut shell charcoal in the same way as the preparation process of the catalyst L.

[0024] The same as the preparation process of catalyst L, change the amount of support, control Ni accounted for 1% and 40% of the catalyst loading, and obtain catalysts N and O.

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Abstract

The invention involves a new preparation method of hydrogenation dechlorination accelerant, it loads high scattering Pd atom cluster on nanometer amorphous alloy or nanometer Ni powder through replacement reaction, then prepares new surface NiPd alloy accelerant through crystallization treatment. The accelerant prepared through the invention has characteristics of small dimension of active components, good dispersion degree and high activity, and it applies to catalytic hydrogenation dechlorination reaction.

Description

technical field [0001] The invention relates to a preparation method of a novel hydrodechlorination catalyst, more specifically a method for preparing a non-supported and supported NiPd alloy catalyst with high catalytic activity. Background technique [0002] Chlorinated organic compounds are products in which one or several hydrogen atoms in a class of aliphatic hydrocarbons, aromatic hydrocarbons and their derivatives are replaced by chlorine atoms. It has a wide variety, including chlorinated aliphatic hydrocarbons, chlorinated benzenes (CBs), chlorinated phenols (CPs), polychlorinated biphenyls (PCBs) compounds, is an important chemical raw material, organic synthesis intermediate and organic solvent, For a long time, it has been widely used in chemical, pharmaceutical, pesticide, dye, electronic and other industries. The wide application of organic chlorinated compounds has also caused serious environmental pollution. This pollution problem has aroused widespread con...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C1/26C07B35/06
Inventor 张明慧李伟吴志杰陶克毅
Owner NANKAI UNIV
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