Catalyst for propane dehydrogenation to prepare propylene and preparation method thereof

A propane dehydrogenation and catalyst technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems such as the reactivity and propylene selectivity need to be further improved, so as to increase the propylene selectivity and reaction Stability, effect of improving reactivity and stability, high hydrothermal stability

Active Publication Date: 2015-12-23
NINGBO HAIYUE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared catalyst has the advantages of simple preparation, good stability, and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of propane dehydrogenation propylene catalyst of the present invention comprises the following steps:

[0030] (1) According to the content of Ni in the catalyst is 0.05wt% of the total weight of the catalyst, sodium metaaluminate and nickel chloride are added to the deionized water, after stirring evenly, caprolactam-tetrabutylammonium fluoride is added dropwise in the system, Continue to stir until uniform, then add sodium hydroxide to the system and stir evenly, then add silica sol to the system, stir evenly, put it into the reaction kettle, and react at 100°C for 5 days. After the reaction is completed, the obtained The product was washed and dried at 80°C for 24 hours, and the dried product was calcined at 450°C for 8 hours to obtain the Ni-SSZ-13 carrier;

[0031] Wherein, the mol ratio of each substance in the reaction system before packing into the reactor is: n(Na 2 O):n(Al 2 o 3 ):n(SiO 2 ):n(lactam-tetrabutylammonium fluoride):n(H ...

Embodiment 2

[0036] The preparation method of propane dehydrogenation propylene catalyst of the present invention comprises the following steps:

[0037] (1) According to the content of Ni in the catalyst being 2.0wt% of the total weight of the catalyst, sodium metaaluminate and nickel nitrate are added to the deionized water, after stirring evenly, caprolactam-tetrabutylammonium fluoride is added dropwise in the system, continue Stir until uniform, then add sodium hydroxide to the system and stir evenly, then add silica sol to the system, stir evenly, put it into a reaction kettle, and react at 140°C for 3 days. After the reaction is completed, the resulting The product was washed and dried at 110°C for 5h, and the dried product was calcined at 650°C for 5h to obtain the Ni-SSZ-13 carrier;

[0038] Wherein, the mol ratio of each substance in the reaction system before packing into the reactor is: n(Na 2 O):n(Al 2 o 3 ):n(SiO 2 ):n(lactam-tetrabutylammonium fluoride):n(H 2 O)=20.0:1.0...

Embodiment 3

[0043] The preparation method of propane dehydrogenation propylene catalyst of the present invention comprises the following steps:

[0044] (1) According to the content of Ni in the catalyst being 1.0wt% of the total weight of the catalyst, sodium metaaluminate and ammonium nickel sulfate are added to deionized water, after stirring evenly, caprolactam-tetrabutylammonium fluoride is added dropwise in the system, Continue to stir until uniform, then add sodium hydroxide to the system and stir evenly, then add silica sol to the system, stir evenly, put it into the reaction kettle, and react at 120°C for 4 days. After the reaction is completed, the obtained The product was washed and dried at 90°C for 20 hours, and the dried product was roasted at 550°C for 6 hours to obtain the Ni-SSZ-13 carrier;

[0045] Wherein, the mol ratio of each substance in the reaction system before packing into the reactor is: n(Na 2 O):n(Al 2 o 3 ):n(SiO 2 ):n(lactam-tetrabutylammonium fluoride):...

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PUM

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Abstract

The invention relates to a catalyst for propane dehydrogenation to prepare propylene. The catalyst is characterized in that a Ni-containing SSZ-13 molecular sieve is taken as the carrier, and Co3O4 is taken as the active component. The invention also relates to a preparation method of the catalyst. According to the preparation method, Ni is in-situ introduced into the carrier namely SSZ-13 molecular sieve, Ni can largely improve the propylene selectivity and stability of catalyst during the propane dehydrogenation process; moreover, the large specific surface of the SSZ-13 molecular sieve can improve the dispersion uniformity of active components; caprolactam-tetrabutyl ammonium fluoride is taken as the template, in one aspect, caprolactam-tetrabutyl ammonium fluoride can be used as a surfactant and is capable of forming a strong interaction force with nano particles; in the other aspect, caprolactam-tetrabutyl ammonium fluoride can form a stable complex with Ni, and is capable of being used as a template to induce nano particles to form a catalyst with regular morphology and a uniform structure, and thus the dispersion uniformity and reaction stability of active component in catalyst are both improved.

Description

technical field [0001] The invention relates to the technical field of catalysts for propane dehydrogenation to propylene, in particular to a catalyst for propane dehydrogenation to propylene and a preparation method thereof. Background technique [0002] As propylene plays a very important role in chemical industry production, it is one of the important basic organic chemical raw materials next to ethylene, and its downstream derivatives mainly include polypropylene, acrylonitrile, acetone, isopropanol, phenol, butanol , propylene glycol, epichlorohydrin and synthetic glycerin, etc. In recent years, with the sharp increase in the demand for downstream derivatives of propylene, the demand for propylene has continued to grow, and the production of propylene from cheap and easily available propane has set off an upsurge in the world, especially in China. Although propane is used as raw material to produce propylene through catalyst dehydrogenation under hydrogen or oxygen atm...

Claims

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Application Information

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IPC IPC(8): B01J29/76C07C5/333C07C11/06
CPCY02P20/52
Inventor 周林军杨春亮
Owner NINGBO HAIYUE NEW MATERIAL
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