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Preparation method of catalyst for propylene preparation through oxidative dehydrogenation of propane

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: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The oxidative dehydrogenation of propane to propylene is still a fast reaction (this kind of fast reaction is generally carried out under the condition of mass transfer control), and the reaction is completed when the reactants reach the outer surface of the catalyst, so the inner surface of the catalyst is relatively The target reaction does not contribute much, which results in lower metal utilization in the pores of the support, increases the cost of the catalyst, and also accelerates the deep oxidation of the product

Method used

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  • Preparation method of catalyst for propylene preparation through oxidative dehydrogenation of propane
  • Preparation method of catalyst for propylene preparation through oxidative dehydrogenation of propane

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Effect test

Embodiment 1

[0032] The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the surface of the catalyst was removed by petroleum ether extraction, dried at 110°C for 8h, and the obtained catalyst was calcined at 450°C for 4h to obtain the spent catalyst after treatment (containing Mo: 12.8wt%, Co: 2.3wt%, V: 2.5 wt%, Ni: 1.9 wt%, Al 2 o 3 : 71.2 wt%), grind the catalyst to 200 mesh (referring to passing through a 200 mesh sieve), weigh 100g of the powder, add 260mL of 98 wt% concentrated sulfuric acid, stir at 50°C to dissolve the solid, collect the filtrate by filtration, and pour it into Add 85.72g of nickel nitrate to the filtrate, stir and dissolve, then add 27.31g of citric acid (the molar ratio of citric acid to Mo in the waste agent is 1), add 740.04g of pseudo-boehmite after all dissolved, and stir at 70°C until The solution was evaporated to dryness, and the obtained solid was dried at 100°C for 8h, and then calcined at 600°C for 4h to obtain the catalyst precursor A, whe...

Embodiment 2

[0034] The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the surface of the catalyst was removed by petroleum ether extraction, dried at 110°C for 8h, and the obtained catalyst was calcined at 450°C for 4h to obtain the spent catalyst after treatment (containing Mo: 12.8wt%, Co: 2.3wt%, V: 2.5 wt%, Ni: 1.9 wt%, Al 2 o 3 : 71.2 wt%), grind the catalyst to 200 mesh (referring to passing through a 200 mesh sieve), weigh 100g of the powder, add 300mL of a mixed solution of 98 wt% concentrated sulfuric acid and 65 wt% concentrated nitric acid, the volume ratio is 2:1, Stir at a constant temperature of 50°C to dissolve the solid, collect the filtrate by filtration, add 54.01g of nickel nitrate to the filtrate, stir to dissolve, add 40.98g of citric acid (the molar ratio of citric acid to Mo in the waste agent is 1.5), and dissolve all Finally, 1665.94 g of pseudo-boehmite was added, stirred at 70°C until the solution was evaporated to dryness, the obtained solid was d...

Embodiment 3

[0036] The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the surface of the catalyst was removed by petroleum ether extraction, dried at 110°C for 8h, and the obtained catalyst was calcined at 450°C for 4h to obtain the spent catalyst after treatment (containing Mo: 12.8wt%, Co: 2.3wt%, V: 2.5 wt%, Ni: 1.9 wt%, Al 2 o 3 : 71.2 wt%), grind the catalyst to 200 mesh (referring to passing through a 200 mesh sieve), weigh 100g of the powder, add 450mL of a mixed solution of 35 wt% concentrated hydrochloric acid and 65 wt% concentrated nitric acid, the volume ratio is 1:1, Stir at constant temperature at 50°C to dissolve the solid, collect the filtrate by filtration, add 96.3g of nickel nitrate to the filtrate, stir to dissolve, add 13.66g of citric acid (the molar ratio of citric acid to Mo in the waste agent is 0.5), and dissolve all Then add 431.41 g of pseudo-boehmite, stir at 70°C until the solution is evaporated to dryness, dry the obtained solid at 100°C for 8 ...

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Abstract

The present invention relates to a preparation method of a catalyst for propylene preparation through oxidative dehydrogenation of propane, 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 propylene selectivity improving.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for propane oxidative dehydrogenation to propylene, in particular to a preparation method of a supported vanadium-based catalyst for propane oxidative dehydrogenation to propylene. Background technique [0002] Propylene is an extremely important organic chemical raw material, widely used in the production of a series of important chemical products such as polypropylene, polyacrylonitrile, phenol, oxo alcohol, propylene oxide, acrolein and acrylic acid. [0003] At present, propylene is mainly produced by catalytic cracking of petroleum and catalytic dehydrogenation of propane. The production process of propane catalytic dehydrogenation to propylene is controlled by thermodynamic equilibrium, the reaction conditions are harsh, and there are problems such as rapid deactivation of the catalyst due to carbon deposition. The oxidative dehydrogenation of propane is a new way to prepare propylene. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C07C11/06C07C5/48
CPCY02P20/52B01J23/8877C07C5/48C07C11/06
Inventor 孙晓丹张舒冬刘继华
Owner CHINA PETROLEUM & CHEM CORP
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