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Nanometer copper catalyst for synthetizing hydrogen peroxide by direct method and preparation method thereof

A technology of hydrogen peroxide and catalyst, which is applied in the field of nano-metallic copper catalyst for direct synthesis of hydrogen peroxide and its preparation, which can solve the problems of large environmental pollution and high price, and achieve good catalyst performance, easy operation, and simple preparation method Effect

Inactive Publication Date: 2004-12-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses precious metal palladium, which is expensive, and has the disadvantages of using a large amount of fluorine-containing organic ligands and causing great environmental pollution.

Method used

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  • Nanometer copper catalyst for synthetizing hydrogen peroxide by direct method and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 0.270 grams of copper chloride (CuCl 2 ·2H 2 O), 0.054 grams of cobalt chloride (CoCl 2 ), 2.0 grams of zinc chloride (ZnCl 2 ), add water to make a solution (10 mL); prepare a copper load by co-precipitation; add 20 ml of an aqueous solution containing 0.270 g of hydrazine hydrate to the load under vigorous stirring, and the precipitate turns black. Wash with deionized water three times, and ethanol wash three times, then used to catalyze the reaction, the solvent is 50ml H 2 O, a small amount of phosphoric acid, CO / O 2 1 / 1 (reaction total pressure 4.0MPa), the yield of hydrogen peroxide after 4 hours at 20°C is 0.087mmolg -1 h -1 .

Embodiment 2

[0040] Take 0.270 grams of copper chloride (CuCl 2 ·2H 2 O) Add water to make a solution (10mL); take another 1.0 g of alumina (Al 2 O 3 ); Prepare the copper support by dipping; add 20ml to the load under vigorous stirring to dissolve 0.270 g of KBH 4 In the aqueous solution, the precipitate turns black and emits a lot of hydrogen. After washing three times with deionized water, it is used to catalyze the reaction, and the solvent is 50ml H 2 O, a small amount of sulfuric acid, CO / O 2 1 / 1 (reaction total pressure 4.0MPa), the yield of hydrogen peroxide after 4 hours at 20℃ is 0.177mmolg -1 h -1 .

Embodiment 3

[0042] Take 0.270 grams of copper chloride (CuCl 2 ·2H 2 O) 0.027 grams of chloroauric acid (HAuCl 4 ), add water to make a solution (10mL); take another 1.0 g of activated carbon (AC); add activated carbon to the copper chloride solution under stirring to prepare a copper support by dipping; add 20 ml of the load under vigorous stirring to dissolve 2.7 g KBH 4 The precipitation of the aqueous solution is black and emits a lot of hydrogen. Wash three times with deionized water and three times with ethanol, and then use it to catalyze the reaction. The solvent is 50ml H 2 O, a small amount of sulfuric acid, CO / O 2 1 / 1 (reaction total pressure 4.0MPa), the yield of hydrogen peroxide after 4 hours at 20°C is 0.110mmolg -1 h -1 .

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Abstract

The present invention belongs to the field of chemical technology, and is new type of nano metal copper catalyst for direct hydrogen peroxide preparing process with CO, O2 and water as material and its preparation process. The catalyst consists of copper 5-20 wt%, metal modifier 1-5 wt% and carrier material the rest, and the copper component is nano metal particle of 5-20 nm size highly dispersed in carrier. The catalyst is prepared through reducing chemically the carrier containing Cu ion and metal modifier and subsequent impurity elimination. The catalyst is used for direct hydrogen peroxide preparing process with CO, O2 and water as material, and has raised hydrogen peroxide yield and excellent industrial application foreground compared with noble metal Pd catalyst.

Description

Technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a nano metal copper catalyst for directly synthesizing hydrogen peroxide and a preparation method thereof. Background technique [0002] Hydrogen peroxide synthesis is an extremely important chemical process, and 2-ethylanthraquinone catalyst is currently the main component of indirect synthesis of hydrogen peroxide catalyst. At present, the industrial production of hydrogen peroxide is all prepared with this catalyst. In this method, an organic solvent containing 2-ethylanthraquinone is used as a working liquid, and hydrogen gas is respectively introduced, and oxygen is used for hydroquinone, and the quinone is circulated between the quinones, and hydrogen peroxide is obtained by hydrolysis. The residual alkyl anthraquinone in the product of this method limits the increase in the concentration of hydrogen peroxide in the finished product. Therefore, the research on the direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/76C01B15/027
Inventor 曹勇冯伟樑戴维林范康年
Owner FUDAN UNIV
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