Copper-based polymer hybrid catalyst used in selective hydrogenation of acetylene and preparation method thereof

A selective hydrogenation and polymer technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, hydrogenation hydrocarbon production, etc., can solve high production costs, low acetylene removal rate, environmental problems Pollution and other issues, to achieve the effect of wide operating window and high activity

Inactive Publication Date: 2012-01-18
王萌 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a copper-based polymer hybrid catalyst for selective hydrogenation of acetylene and a preparation method thereof, in which a copper-based polymer hybrid material is generated in situ at a high temperature by metal components such as acetylene and copper, and It is used in the selective hydrogenation conversion reaction of acetylene in ethylene, so as to solve the problems of low removal rate of acetylene, high production cost, environmental pollution, etc.

Method used

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  • Copper-based polymer hybrid catalyst used in selective hydrogenation of acetylene and preparation method thereof
  • Copper-based polymer hybrid catalyst used in selective hydrogenation of acetylene and preparation method thereof
  • Copper-based polymer hybrid catalyst used in selective hydrogenation of acetylene and preparation method thereof

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Embodiment 1

[0018] The metered copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) The blue solution obtained by dissolving in 10 ml of deionized water was added dropwise to 3 g of SiO 2 In medium, stir quickly to evenly impregnate. Aged in the air for 12 hours, then dried in an oven at 120°C for 12 hours, ground, and fired at 500°C for 3 hours to obtain powdered Cu / SiO 2 catalyst. The catalysts with copper loadings of 30 wt% and 10 wt% were named A-1 and A-2, respectively.

Embodiment 2

[0020] The metered copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and a measured aqueous solution of tetraaminopalladium nitrate were dissolved in 10 ml of deionized water, and the resulting solution was added dropwise to 3 g of SiO 2 In medium, stir quickly to evenly impregnate. Aged in the air for 12 hours, then dried in an oven at 120°C for 12 hours, ground, and fired at 500°C for 3 hours to obtain Cu-Pd / SiO 2 powder catalyst. The loading of copper was 10 wt%, and the loading of palladium was 0.3 wt% and 0.5 wt%, named as B-1 and B-2, respectively.

Embodiment 3

[0022] The catalytic hydrogenation reaction was carried out in a quartz tube reactor with an inner diameter of 8 mm. Weigh a certain amount of catalyst and load it into the constant temperature zone of the reactor, and both ends of the bed are supported by quartz sand. GC-7890F gas chromatograph was used to analyze the composition of reaction raw materials and products. Chromatography adopts FID detector, commercially available Al2O3 chromatographically packed column, the column length is 2 m, and the inner diameter is 0.32 mm. Catalyst performance is described in terms of acetylene conversion and ethylene selectivity.

[0023] 0.1 g of catalyst A-1 was reduced in hydrogen at 300°C for 60 minutes, and then passed through standard gas (2% methane, 1.99% acetylene, 4.01% hydrogen, and the rest of ethylene) and hydrogen for hydrogenation reaction at 300°C, maintaining the standard gas flow The hydrogen flow rate was changed to 50 mL / min, and the effect of hydrogen parti...

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Abstract

The invention belongs to the technical fields of petroleum, coal and natural gas chemical industry, biomass processing and novel catalytic materials, and provides a copper-based polymer hybrid catalyst used in selective hydrogenation of acetylene and a preparation method thereof. In the invention, copper in different valence states is used for catalyzing a polymerization reaction of acetylene at high temperature to form a copper-containing polymer, a copper-based polymer hybrid material is generated in situ when acetylene-containing feed gas passes through a loaded copper-based catalyst at high temperature, and an activity assisting component with high hydrogen dissociation capability is introduced into a catalyst system, so that continuous growth of an acetylene polymer can be suppressed, and the yield of acetylene is increased. Compared with the conventional catalyst, the copper-based polymer hybrid catalyst has the advantages of extremely high acetylene selectivity (95 percent), very high catalytic activity (106 ml/g*h), wide operating window, applicability to front-end hydrogenation and back-end hydrogenation processes, reduction in production cost, extremely small amount of generated ethane and green oil under the condition that the amount of acetylene is extremely excessive, and reduction in environmental pollution.

Description

technical field [0001] The invention belongs to the technical fields of petroleum, coal, natural gas chemical industry, biomass processing and new catalytic materials, and relates to a copper-based polymer that selectively converts acetylene into high value-added ethylene through hydrogenation reaction to produce less ethane and green oil Hybrid catalyst and method for its preparation. technical background [0002] Polyethylene is the most produced synthetic plastic in the world, and its reactive monomer ethylene is mainly obtained through steam cracking of hydrocarbons. The produced ethylene contains a small amount of acetylene (less than 5%), which will poison the polymerization catalyst, deteriorate product quality, and form unsafe factors. Therefore, the industry requires that the content of acetylene in polymerization grade ethylene raw materials be less than 1 ppm. [0003] Obviously, the conversion of acetylene to ethylene by selective hydrogenation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28C07C11/04C07C5/09
CPCY02P20/52
Inventor 王萌王安杰
Owner 王萌
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