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Method for preparing noble metal platinum nano catalyst

A precious metal and platinum nanotechnology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of convenient filtration and recovery, good storage stability, and low precious metal content

Inactive Publication Date: 2018-03-30
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the serious lifetime problem in the use of nano-noble metal catalysts, it is currently mainly in the laboratory research stage and has not been widely used in industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of noble metal platinum nano-catalyst, characterized in that: the preparation method according to the following steps:

[0030] Step 1, adding tetraammine platinum acetate to dissolve in water, then adding an acidifying agent, and ultrasonically stirring to obtain a platinum ion solution;

[0031] Step 2, subjecting the platinum ion solution to a sealed reaction for 2 hours, and then distilling under reduced pressure with slight heat to obtain a concentrated solution;

[0032] Step 3, dissolving sodium sulfite into the concentrated solution, and adding an electrolyte for electrolysis for 2 hours to obtain a suspension, which is filtered to obtain a noble metal nano-catalyst.

[0033] The platinum ion concentration of the platinum ion solution in the step 1 is 0.06mol / L, and the acidifying agent adopts acetic acid.

[0034] The frequency of the ultrasonic stirring in the step 1 is 1.5 kHz, and the ultrasonic time is 30 min.

[0035] The sealing rea...

Embodiment 2

[0043] A preparation method of noble metal platinum nano-catalyst, characterized in that: the preparation method according to the following steps:

[0044] Step 1, adding tetraammine platinum acetate to dissolve in water, then adding an acidifying agent, and ultrasonically stirring to obtain a platinum ion solution;

[0045] Step 2, subjecting the platinum ion solution to a sealed reaction for 4 hours, and then distilling under reduced pressure with slight heat to obtain a concentrated solution;

[0046] Step 3, dissolving sodium sulfite into the concentrated solution, and adding an electrolyte for electrolysis for 4 hours to obtain a suspension, which is filtered to obtain a noble metal nano-catalyst.

[0047] The platinum ion concentration of the platinum ion solution in the step 1 is 0.60mol / L, and the acidifying agent is hydrochloric acid.

[0048] The frequency of the ultrasonic stirring in the step 1 is 2.5 kHz, and the ultrasonic time is 60 min.

[0049] The sealing r...

Embodiment 3

[0057] A preparation method of noble metal platinum nano-catalyst, characterized in that: the preparation method according to the following steps:

[0058] Step 1, adding tetraammine platinum acetate to dissolve in water, then adding an acidifying agent, and ultrasonically stirring to obtain a platinum ion solution;

[0059] Step 2, subjecting the platinum ion solution to a sealed reaction for 3 hours, and then distilling under reduced pressure with slight heat to obtain a concentrated solution;

[0060]Step 3, dissolving sodium sulfite into the concentrated solution, and adding an electrolyte for electrolysis for 3 hours to obtain a suspension, which is filtered to obtain a noble metal nano-catalyst.

[0061] The platinum ion concentration of the platinum ion solution in the step 1 is 0.25mol / L, and the acidifying agent adopts acetic acid.

[0062] The frequency of the ultrasonic stirring in the step 1 is 2.0 kHz, and the ultrasonic time is 40 min.

[0063] The sealing reac...

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PUM

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Abstract

The invention belongs to the field of noble metal catalysts, and particularly relates to a method for preparing a noble metal platinum nano catalyst. The method for preparing the noble metal platinumnano catalyst comprises the following steps of: step 1, adding platinum tetra-amino acetate into water for dissolution, then adding an acidifying agent, and performing ultrasonic stirring to obtain aplatinum ion solution; step 2, performing a sealed reaction on the platinum ion solution for 2-4 hours, and then performing gentle heating reduced pressure concentration to obtain a concentrated solution; and step 3, dissolving sodium sulfite in the concentrated solution, and adding an electrolyte into the concentrated solution, conducting an electrolysis reaction for 2-4 hours so as to obtain suspension, and performing filtration to obtain the noble metal platinum nano catalyst. The method for preparing the noble metal platinum nano catalyst has the advantages of a simple preparation process,easy operation, low content of noble metal and a high industrial value.

Description

technical field [0001] The invention belongs to the field of noble metal catalysts, and in particular relates to a preparation method of a noble metal platinum nanometer catalyst. Background technique [0002] Industrial catalysts are generally used in the chemical industry for polymerization, alkylation, hydrogenation, dehydrogenation, oxidation, synthesis, etc. Among them, the use of noble metal series in hydrogenation catalysts is increasing year by year. Carbon-supported noble metal hydrogenation catalysts are widely used in organic synthesis industries such as liquid-phase hydrogenation and dehydrogenation. 2,2-Dichlorohydroazobenzene dye intermediate is the raw material of azo dyes and organic pigments. It has a very large market demand in the fine chemical industry. bits get. The zinc powder reduction method was used in the early industrial production. Although the cost was low, the product yield was low (about 70%), which actually increased the cost. In recent ye...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J37/10B01J37/34C07F7/18
CPCC07F7/1804C07F7/1876B01J23/42B01J37/10B01J37/342B01J35/23
Inventor 李志彬徐海涛
Owner SHAOXING UNIVERSITY
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