Preparation method of catalyst for oxidative hydrogenation of propane

A technology for oxidative dehydrogenation and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve improved utilization, tight pore structure, and improved resource utilization Effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only utilizes the Mo, Co and alumina supports in the spent hydrotreating catalyst, but also makes full use of the V deposited on the spent hydrotreating catalyst, which solves the pollution problem of the spent catalyst, saves resources and improves efficiency. It is easy to implement, and the performance of the obtained propane oxidative dehydrogenation catalyst is excellent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of the catalyst, the steps are as follows:

[0033] The waste hydrodesulfurization HDS catalyst (MoCo / Al 2 o 3 ), after extraction to remove the oil on the surface of the catalyst, after drying and roasting, the treated waste HDS catalyst (containing Mo: 12.7 wt%, Co: 2.2 wt%, V: 2.4 wt%, Ni: 1.7 wt%, Al 2 o 3 : 71.6 wt%), grind the catalyst to 200 mesh (referring to passing through a 200 mesh sieve), weigh 100 g of the powder, add 250 mL of 98 wt% concentrated sulfuric acid, stir at 50 °C to dissolve the solid, and collect the filtrate by filtration , to the filtrate was added 2.1 g NH 4 VO 3 , after stirring and dissolving, add 12.5 g of citric acid, add 135 g of pseudo-boehmite after all dissolved, stir at 70 °C until the solution is evaporated to dryness, dry the obtained solid at 100 °C for 8 h, and roast at 600 °C for 4 h , the final catalyst MoCoV / Al can be obtained after tablet molding 2 o 3 . Based on the weight of the catalyst, MoO 3 T...

Embodiment 2

[0037] In Example 1, the concentrated sulfuric acid was changed to 300 mL of a mixed solution of 98 wt% concentrated sulfuric acid and 65 wt% nitric acid, the volume ratio was 2:1, the citric acid was changed to 7.5 g, and the pseudoboehmite was changed to 370 g , the rest are the same as in Example 1, and the catalyst obtained is MoCoV / Al 2 o 3 . Based on the weight of the catalyst, MoO 3 The content of CoO is 5.6%, the content of CoO is 0.8%, V 2 o 5 The content of Al is 1.6%, Al 2 o 3 The content is 92%. The physical and chemical properties of the catalysts are listed in Table 1.

[0038] The evaluation of the catalyst is the same as in Example 1, and the results of the oxidative dehydrogenation of propane to propylene with the catalyst are shown in Table 2.

Embodiment 3

[0040] In Example 1, the catalyst is changed to the waste hydrodesulfurization HDS MoCoNi / Al of the fixed-bed residual oil hydrogenation industrial unit 2 o 3 Catalyst (containing Mo: 15.6 wt%, Co: 1.6 wt%, V: 1.7 wt%, Ni: 2.3 wt%, Al 2 o 3 : 68.5 wt%), concentrated sulfuric acid was changed to 350 mL of a mixed solution of 98 wt% concentrated sulfuric acid and 65 wt% concentrated nitric acid, the volume ratio was 1:1, NH 4 VO 3 Change it to 5.5 g, add 3.8 g of cobalt nitrate, change citric acid to 15.4 g, change pseudo-boehmite to 290 g, and the rest are the same as in Example 1, and the obtained catalyst is MoCoV / Al 2 o 3 . Based on the weight of the catalyst, MoO 3 The content of CoO is 7.7%, the content of CoO is 0.7%, V 2 o 5 The content of Al is 1.6%, Al 2 o 3 The content is 90%. The physical and chemical properties of the catalysts are listed in Table 1.

[0041] The evaluation of the catalyst is the same as in Example 1, and the results of the oxidative deh...

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PUM

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Abstract

The invention discloses a preparation method of a catalyst for oxidative hydrogenation of propane. The method comprises the following steps: grinding waste residual oil desulfurization catalysts into powder, adding a strong inorganic acid into the powder, filtering, adding an organic acid into the filtrate, then adding pseudo-boehmite, stirring the solution and heating at the same time until the solution is totally evaporated so as to obtain a solid substance, and then subjecting the solid substance to processes of drying, burning, and forming so as to obtain the catalyst for oxidative hydrogenation of propane. The preparation method fully utilizes the waste residual oil hydro-desulfurization catalysts, improves the resource utilization rate, and greatly reduces the cost; furthermore, the obtained catalyst has a large specific surface area, the active metal is highly dispersed on the catalyst surface, thus the utilization rate of active metal is improved, so the catalytic activity and selectivity of the catalyst are both improved.

Description

technical field [0001] The invention relates to a method for preparing a propane oxidative dehydrogenation catalyst, in particular to a method for preparing a propane oxidative dehydrogenation propylene catalyst from a waste residue oil hydrotreating catalyst. Background technique [0002] Every year, a large amount of spent catalysts that cannot be regenerated are produced all over the world, and hydrogenation catalysts account for a considerable proportion. Residue hydrotreating catalysts have a short service life, and cannot be regenerated after deactivation due to the deposition of a large amount of metal impurities such as Ni and V, especially in waste residue hydrodesulfurization catalysts, which contain 20 wt% to 40 wt% Molybdenum, cobalt, nickel and other valuable metal oxides, if these waste catalysts are discarded or used as fillers in construction and other industries, it will not only cause waste of resources, but also cause certain pollution to the environment d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C07C11/06C07C5/48
CPCY02P20/52
Inventor 金浩孙素华朱慧红刘杰杨光
Owner CHINA PETROLEUM & CHEM CORP
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