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

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 , The contribution of the catalyst is not large, etc., to achieve the effect of facilitating industrial scale-up, reducing the concentration difference, and reducing the amount of metal used

Active Publication Date: 2018-11-06
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 preparation method for ethane oxidative dehydrogenation to produce ethylene catalyst
  • A kind of preparation method for ethane oxidative dehydrogenation to produce ethylene catalyst

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Embodiment 1

[0023] The waste hydrotreating catalyst (MoCo / Al) of the fixed bed residue hydrotreating industrial unit was selected 2 O 3 ), the oil on the catalyst surface was removed by petroleum ether extraction, dried at 110 °C for 8 h, and the obtained catalyst was calcined at 450 °C for 4 h to obtain catalyst precursor A, in which Mo accounted for 7.6wt% of catalyst precursor A in terms of elements, Co accounts for 2.2 wt % of the catalyst precursor A in terms of elements, Ni accounts for 2.3 wt % in terms of elements, and V accounts for 2.1 wt % in terms of elements. Activated in a mixed atmosphere of hydrogen, the volume content of hydrogen in the mixed gas was 80%, the reduction conditions were 450°C, 0.2MPa (absolute pressure), and the reduction time was 4h; 15g polyethylene glycol and 16.3g nickel nitrate were dissolved in 200mL deionized In water, obtain solution B, and mix it with 60 g of furfural solution with a mass fraction of 40%, then add it to the autoclave together with...

Embodiment 2

[0025] The waste hydrotreating catalyst (MoCo / Al) of the fixed bed residue hydrotreating industrial unit was selected 2 O 3), the oil on the catalyst surface was removed by petroleum ether extraction, dried at 110 °C for 8 h, and the obtained catalyst was calcined at 450 °C for 4 h to obtain catalyst precursor A, in which Mo accounted for 5.2wt% of catalyst precursor A in terms of elements, Co accounts for 1.4 wt % of the catalyst precursor A in terms of elements, Ni accounts for 1.7 wt % in terms of elements, and V accounts for 1.5 wt % in terms of elements. Activated in a mixed atmosphere of hydrogen, the volume content of hydrogen in the mixed gas was 80%, the reduction conditions were 450°C, 0.2MPa (absolute pressure), and the reduction time was 4h; 10g polyethylene glycol and 10.7g nickel nitrate were dissolved in 200mL deionized In water, obtain solution B, and mix it with 60 g of furfural solution with a mass fraction of 40%, then add it to the autoclave together with ...

Embodiment 3

[0027] The waste hydrotreating catalyst (MoCo / Al) of the fixed bed residue hydrotreating industrial unit was selected 2 O 3 ), the oil on the catalyst surface was removed by petroleum ether extraction, dried at 110 °C for 8 h, and the obtained catalyst was calcined at 450 °C for 4 h to obtain catalyst precursor A, in which Mo accounted for 9.8wt% of catalyst precursor A in terms of elements, Co accounts for 2.8 wt % of the catalyst precursor A in terms of elements, Ni accounts for 2.7 wt % in terms of elements, and V accounts for 2.6 wt % in terms of elements. Activated in a mixed atmosphere of hydrogen, the volume content of hydrogen in the mixed gas was 80%, the reduction conditions were 450°C, 0.2MPa (absolute pressure), and the reduction time was 4h; 21g polyethylene glycol and 22.1g nickel nitrate were dissolved in 200mL deionized In water, obtain solution B, and mix it with 60 g of furfural solution with a mass fraction of 40%, then add it to the autoclave together with...

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Abstract

The present invention relates to a preparation method of a catalyst for ethylene preparation through oxidative dehydrogenation of ethane, wherein the catalyst comprises an active component, an auxiliary agent, and a carrier. The preparation method comprises: preparing a catalyst precursor A, and reducing the catalyst precursor A; dissolving an auxiliary agent precursor in water, and uniformly mixing with a furfural aqueous solution; adding the obtained mixture and the catalyst precursor A to a high pressure reaction kettle, adding a solution C, and carrying out a reaction; and treating and separating the obtained solid-liquid mixture, filtering the obtained solid sample, drying, and calcining to obtain the catalyst. According to the present invention, the waste residue oil hydrotreating catalyst is completely utilized so as to save the cost; and the prepared catalyst has characteristics of high reaction activity, metal consumption reducing, and ethylene selectivity improving.

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 the cracking of alkanes such as ethane. Compared with high-temperature cracking, oxidative dehydrogenation of ethane to ethylene (ODHE) is a low-energy-consumption route with great application prospects, which 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 several systems of catalysts: alkaline earth metal oxide systems, rare earth metal oxide systems, supported noble metal catalyst systems, and transition metal oxide systems. [0004] CN1121844A discloses a cataly...

Claims

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Application Information

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