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Copper-based alloy catalyst and preparation method and application thereof

A technology of copper-based alloy and catalyst, which is applied in the field of copper-based alloy catalyst and its preparation, can solve the problems of easy loss of precious metals, increase of production cost, and decrease of conversion rate, and achieve the effects of reducing production cost, improving performance, and reducing loss

Active Publication Date: 2020-02-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the preparation methods of the above-mentioned catalysts use precious metals as active components, and copper acts as an auxiliary agent, which will increase the production cost, and at the same time the precious metals are easy to lose or even cause deactivation; when copper is used as the main active component, the activity is low and short The conversion rate drops significantly within a short period of time, and the stability is poor, so it cannot be well applied to industrialization on a large scale. Therefore, it has become an important issue to ensure the long-term stability of the catalyst while maintaining high activity.

Method used

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  • Copper-based alloy catalyst and preparation method and application thereof
  • Copper-based alloy catalyst and preparation method and application thereof
  • Copper-based alloy catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Dissolve 13.4g of copper chloride, 11.1g of indium chloride and 5g of butyltrimethylimidazole acetate in 120ml of deionized water, stir and mix evenly;

[0042] 2) Add 100g of 20-mesh columnar activated carbon to the mixture in step 1), impregnate it with ultrasonic (0.5kW) at 25°C for 4h, and then heat it at 110°C and 12μW / (cm 2 Bake for 10 h under blue light irradiation conditions with *nm) intensity to obtain a completely dry catalyst;

[0043] 3) The catalyst obtained in step 2) is placed in a mixed gas of hydrogen and helium passing through 5ml / min (the volume flow ratio of hydrogen and helium is 0.2:1), and calcined at 900°C for 2h to obtain a copper-based alloy catalyst;

[0044] 4) the copper-based alloy catalyst of above-mentioned gained is packed on the fixed-bed reactor (HCl and C 2 h 2 The molar ratio is 1:0.95), and the volume space velocity of the reaction gas is 180h in terms of acetylene -1 , under the conditions of reaction temperature 100°C and p...

Embodiment 2

[0046] 1) Dissolve 38g of copper phosphate, 11.5g of scandium nitrate and 7.2g of tributylethylphosphine bromide in 110ml of ethanol, stir and mix evenly;

[0047] 2) Add 100g of 20 mesh γ-Al to the mixed solution in step 1) 2 o 3 , impregnated with ultrasonic (10kW) at 40°C for 1.5h, then at 150°C and 50μW / (cm 2 *nm) intensity of blue light irradiation conditions baked 5h, to obtain a completely dry catalyst;

[0048] 3) Place the catalyst obtained in step 2) in a mixed gas of ammonia and helium passing through 20ml / min (the volume flow ratio of ammonia and helium is 0.15:1), and roast at 200°C for 6h to obtain a copper-based alloy catalyst ;

[0049] 4) the copper-based alloy catalyst of above-mentioned gained is packed on the fixed-bed reactor (HCl and C 2 h 2 The molar ratio is 1:1.1), the volume space velocity of the reaction gas is 120h in terms of acetylene -1 , the reaction temperature is 90°C, and the pressure is 0.11MPa, the acetylene hydrochlorination experime...

Embodiment 3

[0051] 1) 15.2g of copper phosphate, 27g of niobium pentachloride and 4.5g of triethylmethylammonium chloride were dissolved in 120ml of methanol water, stirred and mixed evenly;

[0052] 2) Add 100g of 20-mesh columnar titanium dioxide to the mixture in step 1), impregnate it with ultrasonic (5kW) at 60°C for 3.5h, and then 2 Bake for 8 hours under the blue light irradiation condition of *nm) intensity to obtain a completely dry catalyst;

[0053] 3) Place the catalyst obtained in step 2) in a mixed gas of methane and helium passing through 25ml / min (the volume flow ratio of methane and helium is 0.1:1), and roast at 500°C for 4h to obtain a copper-based alloy catalyst;

[0054] 4) the copper-based alloy catalyst of above-mentioned gained is packed on the fixed-bed reactor (HCl and C 2 h 2 The molar ratio is 1:1.05), and the volume space velocity of the reaction gas is 100h in terms of acetylene -1 , under the conditions of reaction temperature 140°C and pressure 0.1MPa, t...

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Abstract

The invention discloses a copper-based alloy catalyst and a preparation method and application thereof. The preparation method of the copper-based alloy catalyst comprises the steps that a copper salt, a metal salt and ionic liquid are mixed and dissolved in a solvent to prepare a mixed solution, then a porous solid carrier is impregnated in the obtained mixed solution for 0.5-5 h at the temperature of 25-100 DEG C, and then obtained solid is heated and dried under the condition of blue light irradiation to obtain treated solid; and the obtained treated solid is roasted under mixed gas of thereducing atmosphere and inert gas under the condition of 200-900 DEG C for 0.5-12 h, and thus the copper-based alloy catalyst is obtained. The characteristic that metal atoms and copper atoms in a copper alloy act to form a stable structure is utilized, and thus the stability of the copper-based alloy catalyst on the carrier is improved; as for drying treatment, blue light is used for irradiation,and performance of the catalyst is improved; and through the roasting process, production of the copper-based alloy catalyst is stable in structure, meanwhile, active sits are exposed, and the catalytic activity of the catalyst is improved.

Description

technical field [0001] The invention relates to a copper-based alloy catalyst, a preparation method and application thereof. Background technique [0002] Polyvinyl chloride (PVC) is an important general-purpose plastic. The energy occurrence characteristics of rich coal, poor oil, and little gas determine that the preparation of vinyl chloride by coal-based calcium carbide method (acetylene hydrochlorination) is the mainstream process of polyvinyl chloride production in my country. The existing catalysts used in the synthesis of vinyl chloride are mercuric chloride and mercury-free chlorides with metal chlorides as active components. Because mercuric chloride can cause serious pollution to the environment, and the polyvinyl chloride obtained by its synthesis contains a small amount of mercury, which limits the application of polyvinyl chloride; people gradually focus on the use of metal chlorides as active components. Among them, noble metal chlorides show the best cataly...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J23/825B01J23/83B01J23/847B01J27/24B01J37/02B01J37/08B01J37/34C07C17/08C07C21/06
CPCB01J23/80B01J23/825B01J23/83B01J23/8474B01J27/24B01J37/0203B01J37/0213B01J37/086B01J37/088B01J37/34B01J37/343B01J2231/32C07C17/08C07C21/06Y02P20/54
Inventor 赵佳李小年陈志王柏林丰枫卢春山岳玉学邵淑娟
Owner ZHEJIANG UNIV OF TECH
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