Supported Pd catalyst for directly synthesizing hydrogen peroxide and preparation method thereof

A hydrogen peroxide, supported technology, which is applied to the supported Pd catalyst for directly synthesizing hydrogen peroxide and the field of preparation thereof, can solve the problems of high production cost, large environmental pollution, complicated production process and the like, and achieves inhibition of hydrogen peroxide degradation. Side reactions, uniform size and good particle dispersibility

Pending Publication Date: 2022-05-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main method of industrial production of hydrogen peroxide at home and abroad is the anthraquinone method, but the production process of the a

Method used

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  • Supported Pd catalyst for directly synthesizing hydrogen peroxide and preparation method thereof
  • Supported Pd catalyst for directly synthesizing hydrogen peroxide and preparation method thereof
  • Supported Pd catalyst for directly synthesizing hydrogen peroxide and preparation method thereof

Examples

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preparation example Construction

[0036] As one aspect of the present invention, a kind of preparation method of the supported Pd catalyst of the present invention directly synthesizes hydrogen peroxide, comprises the steps:

[0037] 1) Dissolving the Pd precursor in deionized water to form a metal precursor solution;

[0038] 2) dissolving the carrier powder in deionized water to form a carrier suspension;

[0039] 3) ultrasonically disperse the metal precursor solution and the carrier suspension, and fully stir them evenly;

[0040] 4) Adding the carrier suspension liquid dropwise to the metal precursor solution, stirring, so that the metal precursor is evenly loaded on the carrier to obtain an impregnation solution;

[0041] 5) Separating the impregnating liquid, vacuum-drying it, and grinding it into powder;

[0042] 6) Calcining the ground powder in static air, and then cooling to room temperature to obtain a supported monometallic Pd catalyst.

[0043] In some embodiments, in step 1), the Pd precursor...

Embodiment 1

[0053] A kind of preparation method of the supported Pd catalyst of directly synthesizing hydrogen peroxide, comprises the steps:

[0054] 1) Weigh 67mgPd(NO 3 ) 2 2H 2 O was dissolved in an appropriate amount of deionized water, and ultrasonicated for 5 minutes to obtain a metal salt solution;

[0055] 2) Weigh 475mgTiO 2 Disperse in an appropriate amount of deionized water, and sonicate for 5 minutes to obtain a carrier suspension;

[0056] 3) During the stirring process, the carrier suspension is added drop by drop into the metal salt solution, and fully stirred so that it is evenly loaded on the carrier to obtain an impregnating solution;

[0057] 4) Put the impregnating solution in a water bath, gradually raise the temperature to 80°C while stirring, heat and evaporate the deionized water until the impregnating solution becomes a viscous paste, cool to room temperature; then place it in a vacuum drying oven for drying , dried at 110°C for 16 hours, and then ground in...

Embodiment 2

[0064] Repeat Example 1, the difference is only: the Pd precursor uses PdCl 2 Replace Pd(NO 3 ) 2 2H 2 O, the obtained sample is similar to Example 1, with the presence of Pd nanoparticles. figure 1 Among them, b is the pair of H for this embodiment 2 o 2 The degradation situation, still can be for H 2 o 2 Degradation is inhibited.

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Abstract

The invention discloses a supported Pd catalyst for directly synthesizing hydrogen peroxide and a preparation method thereof, and the preparation method comprises the following steps: 1) dissolving a Pd precursor in deionized water to form a metal precursor solution; 2) dissolving the carrier powder in deionized water to form a carrier suspension; 3) performing ultrasonic dispersion on the metal precursor solution and the carrier suspension, and fully and uniformly stirring; 4) dropwise adding the carrier suspension into the metal precursor solution, and stirring to uniformly load the metal precursor on the carrier to obtain an impregnation liquid; (5) separating the steeping liquor, carrying out vacuum drying treatment, and grinding into powder; and 6) calcining the ground powder in static air, and cooling to room temperature to obtain the supported monometal Pd catalyst. The Pd catalyst prepared according to the method is good in particle dispersity and uniform in size, and can achieve the effect of inhibiting the subsequent hydrogen peroxide degradation side reaction in the reaction of directly synthesizing hydrogen peroxide from hydrogen and oxygen.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a supported Pd catalyst for directly synthesizing hydrogen peroxide and a preparation method thereof. The catalyst can effectively suppress the side reaction of directly synthesizing hydrogen peroxide. Background technique [0002] Hydrogen peroxide is an important chemical, and when used as a reducing agent, only O 2 , while as an oxidizing agent, the only product is H 2 O. Therefore, hydrogen peroxide will not introduce toxic by-products or difficult-to-separate and difficult-to-degrade substances after participating in chemical reactions, which meets the needs of green environmental protection and sustainable development pursued by modern society, so hydrogen peroxide is favored in industrial production , are widely used in chemical industry, textile, papermaking, wastewater treatment, aerospace applications and many other fields. [0003] With the increasing requiremen...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J37/34B01J37/08B01J37/02C01B15/029
CPCB01J23/44B01J37/08B01J37/343B01J37/0036B01J37/0213C01B15/029Y02P20/584
Inventor 程道建魏佳美曹东
Owner BEIJING UNIV OF CHEM TECH
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