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Supported nano palladium cubic catalyst, preparation method thereof and application in synthesis of hydrogen peroxide

A catalyst and cube technology, which is applied in the field of high-efficiency catalysts for the direct synthesis of hydrogen peroxide from hydrogen and oxygen and its preparation, can solve the problems of low production efficiency, danger, and low catalyst acidity, and achieve easy control, improved stability, and high catalytic efficiency. Effect

Inactive Publication Date: 2019-03-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the anthraquinone method has obvious disadvantages: the use of organic solvents, the coexistence of hydrogen, oxygen, hydrogen peroxide and organic solvents in the process brings certain dangers to production
The patent reports that acidic groups and halogen groups are directly modified on the catalyst carrier, and the carrier has acid groups such as sulfonic acid groups and halogen groups at the same time, so the halogen and acidic substances in the reaction solution are reduced, and the process is simplified. The purpose of green production CN103717304A, but the acidity of the catalyst is low, and the production efficiency is low

Method used

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  • Supported nano palladium cubic catalyst, preparation method thereof and application in synthesis of hydrogen peroxide
  • Supported nano palladium cubic catalyst, preparation method thereof and application in synthesis of hydrogen peroxide
  • Supported nano palladium cubic catalyst, preparation method thereof and application in synthesis of hydrogen peroxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of 5% Pd / SiO 2 Samples, weigh Pd(NO 3 ) 2 ·NH 2 0.0662g of O, 0.01029g of sodium bromide, 1.039g of PVP (polyvinylpyrrolidone) were dissolved in 10ml of deionized water to prepare a solution.

[0029] (2) Mix the above solutions with each other, stir for 0.5h at 80 degrees Celsius, then quickly add 5ml of sodium borohydride solution with a mass concentration of 0.05 on ice at 0-4 degrees Celsius, continue to stir for 3 hours, then filter and wash with deionized water three times To neutral, dry at 110°C, and then calcinate at 400°C in an air atmosphere for 4 hours to obtain catalyst A.

Embodiment 2

[0031] The experiment was carried out in a similar way to Example 1, but the amount of sodium bromide was increased to 0.10298g, and the baking atmosphere was 10% H by volume. 2 / Ar, to obtain catalyst B.

Embodiment 3

[0033] The experiment was carried out in a similar way to Example 1, but by changing the protective agent PVP to PVA (polyvinyl alcohol), catalyst C can be obtained.

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Abstract

The invention discloses a supported nano palladium cubic catalyst. The morphology of the palladium metal is cubic, and the index of lattice planes of an exposed crystal face is (100). Compared with palladium metal particles, the supported palladium cubic catalyst has high catalytic efficiency and good selectivity for a preparation reaction of hydrogen peroxide.

Description

Technical field [0001] The invention belongs to the field of petrochemical industry, and specifically relates to an efficient catalyst for direct synthesis of hydrogen peroxide from hydrogen and oxygen and a preparation method thereof. Background technique [0002] Hydrogen peroxide is an important inorganic chemical that can be used as an oxidant, disinfectant, bleach, deoxidizer, etc. It is widely used in papermaking, chemical, environmental protection, electronics, aerospace and other industries. Hydrogen peroxide is used as a green oxidant, and the products after use are water and oxygen, so it does not pollute the environment. It is a green chemical. In recent years, in the new green chemical industry, hydrogen peroxide has been widely used in the production of caprolactam, cyclohexanone, hydroquinone, propylene oxide and other products as a green chemical. It is precisely because of the increasing application of hydrogen peroxide that the output of hydrogen peroxide has i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44C01B15/029
CPCB01J23/44C01B15/029
Inventor 黄家辉春田正毅张少华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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