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Synthesis and application methods for non-noble metal catalyst used for selective hydrogenation of high concentration acetylene to produce ethylene

A non-precious metal, selective hydrogenation technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of less research

Pending Publication Date: 2017-07-14
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the research on acetylene hydrogenation, at present, it mainly focuses on the development of catalytic hydrogenation technology to remove a small amount of acetylene from ethylene, but there are relatively few related studies on the selective catalytic hydrogenation of high-concentration acetylene to prepare ethylene

Method used

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  • Synthesis and application methods for non-noble metal catalyst used for selective hydrogenation of high concentration acetylene to produce ethylene
  • Synthesis and application methods for non-noble metal catalyst used for selective hydrogenation of high concentration acetylene to produce ethylene
  • Synthesis and application methods for non-noble metal catalyst used for selective hydrogenation of high concentration acetylene to produce ethylene

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A non-precious metal catalyst for selective hydrogenation of high-concentration acetylene to ethylene. Its active components are Ni, Zn and K, and its carrier is α-Al 2 O 3 , And use DFM as the solvent and graphene as the intensifier to synthesize under non-aqueous conditions. After calcination, it is reduced in a hydrogen atmosphere.

[0029] In the preparation method of the non-precious metal catalyst in this embodiment, the specific steps are as follows:

[0030] At step (1) shown in box S100, weigh or measure 10.5g nickel acetylacetonate, 31.5g zinc acetylacetonate, 5.4g potassium acetate, and α-Al according to the catalyst synthesis ratio. 2 O 3 100g, 120ml of DFM and 20g of graphene are immersed in a reactor equipped with a stirring and heating device, the temperature is controlled at 100°C, normal pressure, and stirring is performed for 8 hours.

[0031] At step (2) shown in block S200, the above-mentioned mixed liquid is centrifuged, and the solid material is washed wit...

Embodiment 2

[0035] A non-precious metal catalyst for selective hydrogenation of high-concentration acetylene to ethylene. Its active components are Ni, Zn and K, and its carrier is α-Al 2 O 3 , And use DFM as the solvent and graphene as the intensifier to synthesize under non-aqueous conditions. After calcination, it is reduced in a hydrogen atmosphere.

[0036] In the preparation method of the non-precious metal catalyst in this embodiment, the specific steps are as follows:

[0037] At step (1) shown in box S100, weigh 8.7g nickel acetylacetonate, 20g zinc acetylacetonate, 2.5g potassium acetate, and α-Al according to the catalyst synthesis ratio. 2 O 3 100g, DFM100ml, and graphene 20g are immersed in a reactor equipped with a stirring and heating device, the temperature is controlled at 70°C, normal pressure, and stirred for 10 hours.

[0038] At step (2) shown in block S200, the above-mentioned mixed liquid is centrifuged, and the solid material is washed with absolute ethanol for 2 to 3 time...

Embodiment 3

[0042] A non-precious metal catalyst for selective hydrogenation of high-concentration acetylene to ethylene. Its active components are Ni, Zn and K, and its carrier is α-Al 2 O 3 , And use DFM as the solvent and graphene as the intensifier to synthesize under non-aqueous conditions. After calcination, it is reduced in a hydrogen atmosphere.

[0043] In the preparation method of the non-precious metal catalyst in this embodiment, the specific steps are as follows:

[0044] At step (1) shown in box S100, according to the catalyst synthesis ratio, weigh 30g nickel acetylacetonate, 40g zinc acetylacetonate, 7.5g potassium acetate, and α-Al 2 O 3 100g, DFM150ml, graphene 30g, impregnated in a reactor equipped with a stirring and heating device, the temperature is controlled at 100℃, normal pressure, stirring for 15h;

[0045] At step (2) shown in block S200, the above-mentioned mixed liquid is centrifuged, and the solid material is washed with absolute ethanol for 2 to 3 times, filtered, ...

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Abstract

Synthesis and application methods for a non-noble metal catalyst used for selective hydrogenation of high concentration acetylene to produce ethylene. An active component of the non-noble metal catalyst is a combination of Ni, Zn and K, wherein alpha-Al2O3 serves as a carrier. The proportion of nickel acetylacetonate, zinc acetylacetonate, potassium acetate to the alpha-Al2O3 is 8.7-30:20-40:2.5-7.5:100 by gram. In synthesis of the catalyst, dimethylformamide (DMF) is used as a solvent and graphene is used as an enhancer. The catalyst is synthesized under a non-aqueous condition and is prepared by drying the components and then calcining the components at 400-500 DEG C. The catalyst, after being reduced with hydrogen gas, is applied to a reaction system of selective catalysis of high concentration acetylene to produce ethylene, wherein the acetylene is sourced from a calcium carbide method. In addition, the ethylene is synthesized in a slurry bed reactor at high space velocity, DFM being the solvent. In the invention, the catalyst has high acetylene conversion rate and high ethylene selectivity, and is long in service life.

Description

Technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for synthesizing a catalyst for selective catalytic hydrogenation of high-concentration acetylene and the application of the catalyst in the process of preparing ethylene. Background technique [0002] Ethylene is the most important basic raw material in petrochemical industry. At present, it mainly comes from the catalytic cracking of petroleum or low-carbon paraffins. With the depletion of petroleum resources, combined with the energy characteristics of my country’s rich coal and poor oil, acetylene is produced through the calcium carbide process using coal as a raw material, and then ethylene products are produced through hydrogenation under the action of a selective hydrogenation catalyst, which can further expand coal Chemical route. The traditional process of calcium carbide production has high energy consumption. With technological progress, the use of new...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C5/09C07C11/04
CPCY02P20/52B01J23/80C07C5/09C07C11/04
Inventor 史东军史雪君刘周恩余海鹏吴黎阳黄伟苏二强吴道洪
Owner SHENWU TECH GRP CO LTD
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