A kind of catalyst preparation method for oxidative dehydrogenation of ethane to produce ethylene

A technology for oxidative dehydrogenation and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low metal utilization in carrier channels and accelerate deep oxidation of products , increase catalyst cost and other issues, to avoid further oxidation, improve conversion rate and ethylene selectivity, and speed up adsorption and desorption

Active Publication Date: 2018-01-16
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the catalysts prepared by the above-mentioned patented methods have obtained good performance in the oxidative dehydrogenation of ethane to ethylene, because the reaction is a fast reaction (this fast reaction is generally carried out under the condition of mass transfer control), The reaction is completed when the reactant reaches the outer surface of the catalyst, so the inner surface of the catalyst does not contribute much to the target reaction, which results in lower metal utilization in the carrier pores, increases the cost of the catalyst, and accelerates the production rate of the product. deep oxidation of

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  • A kind of catalyst preparation method for oxidative dehydrogenation of ethane to produce ethylene
  • A kind of catalyst preparation method for oxidative dehydrogenation of ethane to produce ethylene

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Embodiment 1

[0026] The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the surface of the catalyst was removed by extraction, dried at 110°C for 8 h, and the obtained catalyst was calcined at 450°C for 4 h to obtain a catalyst precursor A, in which Mo accounted for 9.6 wt% of the weight of the catalyst precursor A in terms of elements, and Co was Accounting for 2.2wt% of catalyst precursor A weight in terms of elements, Ni accounting for 2.1wt% of catalyst precursor A weight in terms of elements, V accounting for 2.4wt% of catalyst precursor A weight in terms of elements; Activation in a mixed atmosphere, the volume content of hydrogen in the mixed gas is 80%, the reduction conditions are 450°C, 0.2MPa (absolute pressure), and the reduction time is 4h; the reduced and activated catalyst precursor A is mixed with 300mL of 10% mass concentration of Sorbet Add the alcohol solution into the autoclave, seal it and replace it with hydrogen for 3 times, then adjust the hydrogen pressu...

Embodiment 2

[0028] The spent hydrotreating catalyst (MoCo / Al 2 o 3), the oil on the surface of the catalyst was removed by extraction, dried at 110°C for 8 h, and the obtained catalyst was calcined at 450°C for 4 h to obtain a catalyst precursor A, in which Mo accounted for 9.6 wt% of the weight of the catalyst precursor A in terms of elements, and Co was Accounting for 2.2wt% of catalyst precursor A weight in terms of elements, Ni accounting for 2.1wt% of catalyst precursor A weight in terms of elements, V accounting for 2.4wt% of catalyst precursor A weight in terms of elements; Activation in a mixed atmosphere, the volume content of hydrogen in the mixed gas is 80%, the reduction conditions are 450°C, 0.2MPa (absolute pressure), and the reduction time is 4h; the reduced and activated catalyst precursor A is mixed with 300mL of 10% mass concentration of Sorbet Add the alcohol solution into the autoclave, seal it and replace it with hydrogen for 3 times, then adjust the hydrogen pressur...

Embodiment 3

[0030] The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the surface of the catalyst was removed by extraction, dried at 110°C for 8 h, and the obtained catalyst was calcined at 450°C for 4 h to obtain a catalyst precursor A, in which Mo accounted for 9.6 wt% of the weight of the catalyst precursor A in terms of elements, and Co was Accounting for 2.2wt% of catalyst precursor A weight in terms of elements, Ni accounting for 2.1wt% of catalyst precursor A weight in terms of elements, V accounting for 2.4wt% of catalyst precursor A weight in terms of elements; Activation in a mixed atmosphere, the volume content of hydrogen in the mixed gas is 80%, the reduction conditions are 450°C, 0.2MPa (absolute pressure), and the reduction time is 4h; the reduced and activated catalyst precursor A is mixed with 300mL of 10% mass concentration of Sorbet Add the alcohol solution into the autoclave, seal it and replace it with hydrogen for 3 times, then adjust the hydrogen pressu...

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Abstract

The invention relates to a method for preparing a catalyst for oxidative dehydrogenation of ethane to produce ethylene. The catalyst includes an active component, an auxiliary agent and a carrier. The method for preparing the catalyst comprises: treating the waste residue oil hydrogenation catalyst to prepare the catalyst body A; then the catalyst precursor A is reduced using a reducing atmosphere; the reduced catalyst precursor A and polyol solution are added to the autoclave for hydrogenation reaction, and the reaction effluent is placed and then filtered and dried to obtain Catalyst precursor B: dissolving the active component precursor in water to obtain solution C, then adding catalyst precursor B, drying and roasting to obtain a catalyst. The method of the invention not only makes full use of the waste residue oil hydrotreating catalyst, saves cost, but also promotes the dispersion of more active components on the surface of the carrier, which not only improves the utilization rate of active metals, but also improves the conversion rate of ethane and the Ethylene selectivity.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for oxidative dehydrogenation of ethane to produce ethylene, in particular to a method for preparing a supported nickel-based catalyst for oxidative dehydrogenation of ethane to produce ethylene. Background technique [0002] Ethylene is an important petrochemical basic raw material, which is mainly produced by cracking alkanes such as ethane. Compared with pyrolysis, oxidative dehydrogenation of ethane to ethylene (ODHE) is a low-energy pathway with great application prospects, and is one of the research hotspots in the field of catalysis in recent years. [0003] The research on catalysts for oxidative dehydrogenation of ethane to ethylene involves catalysts of several systems: alkaline earth metal oxide systems, rare earth metal oxide systems, supported noble metal catalyst systems, and transition metal oxide systems. [0004] CN1121844A discloses a catalyst and process for producing ethyle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887B01J35/10C07C11/04C07C5/48
CPCY02P20/52
Inventor 孙晓丹张舒冬张信伟刘继华
Owner CHINA PETROLEUM & CHEM CORP
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