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Copper-based catalyst taking nitrogen-modified activated carbon as carrier as well as preparation method and application thereof

A technology of copper-based catalyst and activated carbon, which is applied in chemical instruments and methods, hydrogen halide addition preparation, physical/chemical process catalysts, etc.

Pending Publication Date: 2020-07-17
鄂尔多斯市瀚博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention provides a copper-based catalyst with nitrogen-modified activated carbon as a carrier. The catalyst avoids the problem of pollution, and has a simple preparation method and low cost; it has good activity and stability, and can better Applied in acetylene hydrochlorination reaction

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  • Copper-based catalyst taking nitrogen-modified activated carbon as carrier as well as preparation method and application thereof
  • Copper-based catalyst taking nitrogen-modified activated carbon as carrier as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0039] Combine the urea modifier with a specific surface area of ​​1400m 2 / g, ash content equal to 4% of the wood activated carbon is immersed in an appropriate amount of deionized water at a mass ratio of 1:1, stirred at 90°C for 12h, taken out, drained, and dried at 100°C for 10h for later use.

[0040] Put the above product on a fixed bed, heat it up to 800°C at a heating rate of 10°C / min under a nitrogen atmosphere, keep this temperature for 5 hours, then cool to room temperature under an inert atmosphere, and dry to obtain nitrogen-modified activated carbon.

[0041] Preparation and application of nitrogen-modified copper-based catalyst: The nitrogen-modified activated carbon obtained above is impregnated in equal volumes in the prepared copper nitrate solution. The concentration of the configured copper nitrate solution makes the copper content of the final catalyst 17% of the total weight. The soaking time is 8h. Evaporate to dryness in a water bath, put in an oven an...

Embodiment 2

[0044] Combine the urea modifier with a specific surface area of ​​1400m 2 / g, ash content equal to 4% wood activated carbon is immersed in an appropriate amount of deionized water at a mass ratio of 0.5:1, stirred at 90°C for 12h, taken out, drained, and dried at 100°C for 10h for later use.

[0045] Put the above product on a fixed bed, heat it up to 800°C at a heating rate of 10°C / min under a nitrogen atmosphere, keep this temperature for 5 hours, then cool to room temperature under an inert atmosphere, and dry to obtain nitrogen-modified activated carbon.

[0046] Preparation and application of nitrogen-modified copper-based catalyst: The nitrogen-modified activated carbon obtained above is impregnated in equal volumes in the prepared copper nitrate solution. The concentration of the configured copper nitrate solution makes the copper content of the final catalyst 17% of the total weight. The soaking time is 8h. Evaporate to dryness in a water bath, put in an oven and dry...

Embodiment 3

[0049] Combine the urea modifier with a specific surface area of ​​1400m 2 / g, ash content equal to 4% woody activated carbon impregnated in an appropriate amount of deionized water at a mass ratio of 5:1, stirred at 90°C for 12h, taken out, drained, and dried at 100°C for 10h for later use.

[0050] Put the above product on a fixed bed, heat it up to 800°C at a heating rate of 10°C / min under a nitrogen atmosphere, keep this temperature for 5 hours, then cool to room temperature under an inert atmosphere, and dry to obtain nitrogen-modified activated carbon.

[0051] Preparation and application of nitrogen-modified copper-based catalyst: The nitrogen-modified activated carbon obtained above is impregnated in equal volumes in the prepared copper nitrate solution. The concentration of the configured copper nitrate solution makes the copper content of the final catalyst 17% of the total weight. The soaking time is 8h. Evaporate to dryness in a water bath, put in an oven and dry ...

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Abstract

The invention provides a copper-based catalyst taking nitrogen-modified activated carbon as a carrier as well as a preparation method and application of the copper-based catalyst, and belongs to the field of acetylene hydrochlorination catalysts. One or more of urea, melamine, ammonium bicarbonate and ammonia gas are used as modifiers to modify wood activated carbon, a nitrogen-modified activatedcarbon carrier is obtained, a copper salt is used as an active component and adsorbed to the surface of the nitrogen-modified activated carbon carrier through an impregnation method, and the copper-based catalyst with the nitrogen-modified activated carbon as the carrier is obtained. The activated catalyst is applied to an acetylene hydrochlorination reaction, the acetylene conversion rate is 96%or above, the vinyl chloride selectivity is 99.6% or above, the catalyst activity and stability are high, the catalyst provided by the invention is a mercury-free non-noble metal catalyst, and the preparation method is relatively simple, low in cost and free of mercury pollution.

Description

technical field [0001] The invention relates to a copper-based catalyst with nitrogen-modified activated carbon as a carrier, a preparation method and application thereof, and belongs to the field of acetylene hydrochlorination reaction catalysts. Background technique [0002] Polyvinyl chloride (referred to as PVC), as one of the world's top five engineering plastics, is a polymer compound polymerized from vinyl chloride monomer (referred to as VCM). Its global market demand is very large and increasing year by year. VCM is the main raw material for the production of PVC. At present, most of the foreign VCM production processes have replaced the calcium carbide acetylene method (acetylene hydrochlorination method) with the ethylene route (ethylene oxychlorination method). However, due to the shortage of petroleum resources in my country, However, the resources of coal and limestone are extremely rich, and the acquisition of acetylene is relatively easy, which also determine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C17/08C07C21/06B01J35/10
CPCB01J27/24C07C17/08B01J35/618C07C21/06
Inventor 徐小雷赵长森牛强
Owner 鄂尔多斯市瀚博科技有限公司
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