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A kind of preparation method of palladium catalyst supported by ceramic membrane

A technology of palladium catalyst and ceramic membrane, which is applied in the field of catalysis to achieve the effect of high activity and high stability

Active Publication Date: 2018-04-03
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of high-performance membrane catalysts remains a challenge

Method used

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  • A kind of preparation method of palladium catalyst supported by ceramic membrane
  • A kind of preparation method of palladium catalyst supported by ceramic membrane
  • A kind of preparation method of palladium catalyst supported by ceramic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Pd / Al 2 o 3 Preparation of Membrane Catalysts

[0030] (1) Nano-coating modification

[0031] Weigh 0.367g of anhydrous zinc acetate, add 0.12mL of ethanolamine to a mixed solution of 100mL of ethanol and 100mL of ethylene glycol methyl ether, stir at 60°C until transparent, and age for 12 hours to obtain a sol. Soak Al in deionized water 2 o 3 Membrane tubes, with a membrane pore size of 5 μm, were dried for later use. Put the membrane tube into the filter bottle, vacuum for 10 minutes, add the sol through the pear-shaped funnel, continue to soak for 30 minutes under negative pressure, and take it out. Then the membrane tube was heated to 600°C at a heating rate of 2°C / min, calcined in air atmosphere for 60min, and cooled naturally.

[0032] (2) Preparation of catalyst

[0033] Impregnation: Prepare 100mL of 0.02mol / L palladium acetate / acetone solution in the raw material tank, place the ceramic membrane tube in the inner tube of the membrane module an...

Embodiment 2

[0040] Example 2 Pd / ZrO 2 Preparation of Membrane Catalysts

[0041] (1) Nano-coating modification

[0042] Weigh 36.7g of anhydrous zinc acetate, add 12mL of ethanolamine to a mixed solution of 100mL of ethanol and 100mL of ethylene glycol methyl ether, stir at 100°C until transparent, and age for 48h to obtain a sol. Soak ZrO in deionized water 2Membrane tube with a membrane pore size of 200nm, dried for later use. Put the membrane tube into the filter bottle, vacuum for 60 minutes, add the sol through the pear-shaped funnel, continue to soak for 120 minutes under negative pressure, and take it out. Then the membrane tube was heated to 800°C at a heating rate of 5°C / min, calcined in air atmosphere for 120min, and cooled naturally. Repeat the sol soaking-calcination step 2 more times.

[0043] (2) Preparation of catalyst

[0044] Impregnation: Prepare 100mL of 0.5mol / L palladium acetate / acetone solution in the raw material tank, place the ceramic membrane tube in the in...

Embodiment 3

[0050] Example 3 Pd / TiO 2 Preparation of Membrane Catalysts

[0051] (1) Nano-coating modification

[0052] Weigh 11.01g of anhydrous zinc acetate, add 3.6mL of ethanolamine to a mixed solution of 100mL of ethanol and 100mL of ethylene glycol methyl ether, stir at 20°C until transparent, and age for 24h to obtain a sol. Soak TiO with deionized water 2 Membrane tube with a membrane pore size of 50nm, dried for later use. Put the membrane tube into the filter bottle, vacuum for 60 minutes, add the sol through the pear-shaped funnel, continue to soak in negative pressure for 60 minutes, and take it out. Then the film tube was heated to 300°C at a heating rate of 1°C / min, calcined in air atmosphere for 240min, and cooled naturally. The sol soaking-calcination part was repeated 4 more times.

[0053] (2) Preparation of catalyst

[0054] Impregnation: Prepare 100mL of 1mol / L palladium acetate / acetone solution in the raw material tank, place the ceramic membrane tube in the inn...

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Abstract

The invention relates to a preparation method of a ceramic membrane-supported palladium catalyst, which belongs to the technical field of catalysis. The catalyst uses a ceramic membrane as a carrier. First, a nano-ZnO coating is used to modify the surface and pores of the ceramic membrane, and then the active component is impregnated with a palladium salt solution, and then reduced by hydrazine hydrate to prepare the catalyst. The advantage of this invention is that nanoscale palladium catalyst particles are loaded on a ceramic membrane modified with a nano-ZnO coating, which enhances the binding force between the catalyst particles and the membrane, improves the stability of the catalyst, and avoids the need for subsequent contact between the catalyst and the product. The problem of difficult separation can be widely used in the hydrogenation reaction process.

Description

technical field [0001] The invention relates to a preparation method of a supported catalyst, in particular to a preparation method of a ceramic membrane-supported palladium catalyst used in a hydrogenation process, and belongs to the technical field of catalysis. Background technique [0002] Nano-noble metal catalysts organically combine the unique physical and chemical properties of noble metals with the special properties of nano-materials - large specific surface area, many surface defects, short diffusion channels in the crystal, strong adsorption capacity, etc., showing excellent catalytic performance and attracting people's attention. . However, in actual production and application, there is a problem that it is difficult to balance catalyst activity and catalyst separation. The catalytic efficiency of suspended catalysts is higher than that of supported catalysts, but it is difficult to separate nanocatalysts from products, which limits its application. [0003] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/60B01J35/06B01J37/02C07C213/02C07C215/76
CPCC07C213/02B01J23/60B01J37/0228B01J35/59C07C215/76
Inventor 陈日志彭明华唐文麒姜红张红艳邢卫红
Owner NANJING TECH UNIV