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Preparation of NiWAlZr hydrotalcite-like catalyst and application of catalyst in hydrodesulfurization

A hydrodesulfurization and hydrotalcite-like technology, applied in the direction of heterogeneous catalyst chemical elements, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of strong interaction and catalyst specific surface area Low-level problems, to achieve the effect of high dispersion of active components, excellent hydrodesulfurization performance, and easy reduction vulcanization

Inactive Publication Date: 2017-11-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The invention provides a preparation method of a non-supported hydrodesulfurization catalyst using hydrotalcite as a precursor, and it is applied in the hydrodesulfurization of oil products to solve the interaction between the active component and the carrier in the existing hydrodesulfurization catalyst Strong, low specific surface area of ​​catalyst, etc.

Method used

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  • Preparation of NiWAlZr hydrotalcite-like catalyst and application of catalyst in hydrodesulfurization
  • Preparation of NiWAlZr hydrotalcite-like catalyst and application of catalyst in hydrodesulfurization

Examples

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Effect test

Embodiment 1

[0029] According to the ratio of Ni / Al / Zr=3 / 0.6 / 0.4, weigh Ni(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O, ZrO(NO 3 ) 2 2H 2 Dissolve O in 100ml of boiled deionized water to prepare a mixed salt solution; in addition, dissolve NaOH in 100ml of deionized water to prepare a 1mol / L alkaline solution. Pour the mixed salt solution into the flask, and drop in the NaOH solution at a rate of 4-6 s / drop, stop when the pH of the solution is 8, and continue stirring for 60 min. Subsequently, hydrothermal crystallization was carried out at 100°C for 12 hours, and the obtained precipitate was filtered and washed to neutrality with boiled deionized water, and vacuum-dried at 80°C for 6 hours to obtain nitrate-type nickel aluminum zirconium hydrotalcite (Ni 3 al 0.6 Zr 0 4 -NO 3 -LDH).

[0030] Take Ni 3 al 0 6 Zr 0 4 -NO 3 -LDHs, Na 2 WO 4 Prepare a suspension with ethylene glycol and pour it into a flask with 2% HNO 3 Adjust the pH of the solution to 6.5, exchange it at 120°C f...

Embodiment 2

[0033] According to the ratio of Ni / Al / Zr=3 / 0.7 / 0.3, weigh Ni(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O, ZrO(NO 3 ) 2 2H 2 Dissolve O in 100ml of boiled deionized water to prepare a mixed salt solution; in addition, dissolve NaOH in 100ml of deionized water to prepare a 1mol / L alkaline solution. Pour the mixed salt solution into the flask, and drop in the NaOH solution at a rate of 4-6 s / drop, stop when the pH of the solution is 8, and continue stirring for 60 min. Subsequently, it was hydrothermally crystallized at 120°C for 12 hours, and the obtained precipitate was filtered and washed to neutrality with boiled deionized water, and dried in vacuum at 80°C for 6 hours to obtain nitrate-type nickel aluminum zirconium hydrotalcite (Ni 3 al 0 7 Zr 0 3 -NO 3 -LDH).

[0034] Take Ni 3 al 0 7 Zr 0 3 -NO 3 -LDHs, Na 2 WO 4 Prepare a suspension with ethylene glycol and pour it into a flask with 2% HNO 3 Adjust the pH of the solution to 6, exchange it at 120°C for 10h, f...

Embodiment 3

[0037] According to the ratio of Ni / Al / Zr=3 / 0.8 / 0.2, weigh Ni(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O, ZrO(NO 3 ) 2 2H 2 Dissolve O in 100ml of boiled deionized water to prepare a mixed salt solution; in addition, dissolve NaOH in 100ml of deionized water to prepare a 1mol / L alkaline solution. Pour the mixed salt solution into the flask, and drop in the NaOH solution at a rate of 4-6 s / drop, stop when the pH of the solution is 9, and continue stirring for 60 min. Subsequently, hydrothermal crystallization at 80°C for 10h, the obtained precipitate was filtered and washed to neutrality with boiled deionized water, and vacuum-dried at 80°C for 6h to obtain nitrate-type nickel aluminum zirconium hydrotalcite (Ni 3 al 0 8 Zr 0 2 -NO 3 -LDH).

[0038] Take Ni 3 al 0.8 Zr 0 2 -NO 3 -LDHs, Na 2 WO 4 Prepare a suspension with ethylene glycol and pour it into a flask with 2% HNO 3 Adjust the pH of the solution to 6.5, exchange it at 100°C for 10h, filter and wash the res...

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Abstract

The invention discloses preparation and application of an unsupported hydrodesulfurization catalyst with a hydrotalcite-like laminated structure. According to the catalyst, W is taken as an active component, and Ni and Zr are auxiliaries. Firstly, Ni, Al and Zr are introduced into hydrotalcite laminates with a coprecipitation method, W is introduced between the hydrotalcite-like laminates with an ion exchange method, and the NiWAlZr catalyst with the hydrotalcite-like special laminated structure is prepared through roasting, so that high dispersion and weak interaction of the active component are realized. The prepared catalyst shows higher hydrodesulfurization activity in the hydrodesulfurization reaction of an oil product.

Description

technical field [0001] The invention belongs to the technical field of catalytic hydrodesulfurization, and in particular relates to a preparation method and application of a non-loaded hydrodesulfurization catalyst using nickel-aluminum-zirconium-tungsten hydrotalcite as a precursor. Background technique [0002] With the increasingly stringent environmental protection regulations, the pace of upgrading clean diesel standards is accelerating. Hydrodesulfurization is currently the mainstream technology for producing ultra-low sulfur clean diesel. Improving the activity of hydrodesulfurization catalysts is the most economical and effective way to increase the depth of desulfurization. [0003] At present, the main active components of hydrodesulfurization catalysts are VIB group metal Mo or W as the main agent, and VIII group metal Co or Ni as the auxiliary agent. Depending on whether the carrier is used, the hydrodesulfurization catalyst can be divided into supported catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C10G45/08
CPCC10G45/08B01J23/002B01J23/888B01J2523/00C10G2300/202B01J35/613B01J35/615B01J2523/31B01J2523/48B01J2523/69B01J2523/847
Inventor 王豪杨周玺詹旭春吴雁
Owner SOUTHWEST PETROLEUM UNIV
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