Reforming catalyst with high dispersion stability and preparation method thereof

A technology of dispersion stability and catalyst, applied in chemical instruments and methods, physical/chemical process catalysts, reformed naphtha, etc., can solve the problems of poor stability of metal active centers of highly dispersed catalysts, and achieve easy industrial application, stable High performance and good reusability

Active Publication Date: 2014-11-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a highly dispersed and stable reforming catalyst and a prepar

Method used

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  • Reforming catalyst with high dispersion stability and preparation method thereof
  • Reforming catalyst with high dispersion stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step A: Mg(NO 3 ) 2 ·6H 2 O, SnCl 4 ·5H 2 O, urea with Mg 2+ :urea:Sn 4+ = The ratio of 3:2:0.02 is dissolved in deionized water, and a certain amount of Al is installed 2 o 3 The reactor was vacuumized, then the above mixed solution was added, and crystallized at 85°C for 5h. Wash by suction filtration, wash with deionized water until neutral, and dry.

[0023] Step B: For the MgAlSn-LDH / Al synthesized in the step (A) 2 o 3 The container was vacuumized and injected with 3.745mL Na 2 PtCl 6 solution (0.046M), let stand for a while, and dry overnight.

[0024] Step C: The catalyst precursor prepared in step (B) is preferably calcined in air at 600°C for 4h (flow rate 80mL / min / g), preferably in 400°C H 2 Reduction for 4h (flow rate 60mL / min / g), heating rate is 10°C / min.

[0025] That is to prepare Pt / MgAlSn-LDO / Al 2 o 3 For the catalyst, the actual loading amount of Pt is 0.30%, and the actual loading amount of Sn is 0.29%.

[0026] According to the X-ray...

Embodiment 2

[0039] Step A: Mg(NO 3 ) 2 ·6H 2 O, SnCl 4 ·5H 2 O, urea with Mg 2+ :urea:Sn 4+ = 3:2:0.01 ratio dissolved in deionized water, for a certain amount of Al 2 o 3 The reactor was vacuumized, then the above mixed solution was added, and crystallized at 85°C for 5h. Wash by suction filtration, wash with deionized water until neutral, and dry.

[0040] Step B: For the MgAlSn-LDH / Al synthesized in the step (A) 2 o 3 The container was vacuumized and injected with 3.74mL Na 2 PtCl 6 solution (0.046M), let stand for a while, and dry overnight.

[0041] Step C: The catalyst precursor prepared in step (B) is preferably calcined in air at 600°C for 4h (flow rate 80mL / min / g), preferably in 400°C H 2 Reduction for 4h (flow rate 60mL / min / g), heating rate is 10°C / min.

[0042] That is to prepare Pt / MgAlSn-LDO / Al 2 o 3 For the catalyst, the actual loading amount of Pt is 0.30%, and the actual loading amount of Sn is 0.15%.

Embodiment 3

[0044] Step A: Mg(NO 3 ) 2 ·6H 2 O, SnCl 4 ·5H 2 O, urea with Mg 2+ :urea:Sn 4+ = 3:2:0.03 ratio dissolved in deionized water, with a certain amount of Al 2 o 3 The reactor was vacuumized, then the above mixed solution was added, and crystallized at 85°C for 5h. Wash by suction filtration, wash with deionized water until neutral, and dry.

[0045] Step B: For the MgAlSn-LDH / Al synthesized in the step (A) 2 o 3 The container was vacuumized and injected with 3.745mL Na 2 PtCl 6 solution (0.046M), let stand for a while, and dry overnight.

[0046] Step C: The catalyst precursor prepared in step (B) is preferably calcined in air at 600°C for 4h (flow rate 80mL / min / g), preferably in 400°C H 2 Reduction for 4h (flow rate 60mL / min / g), heating rate is 10°C / min.

[0047] That is to prepare Pt / MgAlSn-LDO / Al 2 o 3 For the catalyst, the actual loading amount of Pt is 0.30%, and the actual loading amount of Sn is 0.38%.

[0048] The catalysts obtained in Examples 2 and 3 a...

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Abstract

The invention relates to a reforming catalyst with high dispersion stability and a preparation method thereof and belongs to the technical field of reforming catalysts. The catalyst has a multistage structure constructed by alumina and hydrotalcite, assistant metal is introduced into a hydrotalcite laminate by using the characteristic that metal cations of the hydrotalcite laminate are adjustable, and the stability of the assistant metal is improved due to the crystal lattice confinement effect of the hydrotalcite laminate; due to interaction of Pt with the stable assistant metal, high dispersion stability is achieved. The reforming catalyst with the high dispersion stability and the preparation method thereof have the advantages that the dispersion stability of the assistant metal and Pt is high; the reusability of the catalyst is good; in addition, the reforming catalyst has the multistage structure, so that industrial application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of reforming catalysts, and in particular provides a highly dispersed and stable reforming catalyst and a preparation method thereof. Background technique [0002] Catalytic reforming is the rearrangement of hydrocarbon molecules to form new molecular structures under the action of catalysts. It is one of the important petroleum refining processes and can convert naphtha into high-octane gasoline components. The catalytic reforming process is inseparable from the catalytic effect of catalysts, and high-performance catalysts have always been the goal pursued by everyone. [0003] A high-performance catalyst refers to a catalyst with high activity, high selectivity and high stability. For reforming catalysts, the catalyst needs to be regenerated, which is generally achieved by oxychlorination reduction. On the one hand, it is to burn off the carbon deposits on the surface of the catalyst, and on the other han...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/60B01J23/62B01J23/89B01J23/652C10G35/085
Inventor 何静张艳安哲
Owner BEIJING UNIV OF CHEM TECH
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