Isobutane dehydrogenation catalyst employing silica gel as support, preparation method for isobutane dehydrogenation catalyst and application of isobutane dehydrogenation catalyst

A dehydrogenation catalyst, isobutane technology, applied in catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve the problems of uneven dispersion of precious metal active components, poor catalytic activity and stability, and reduce the risk of carbon deposition. , Low preparation cost, good product repeatability

Inactive Publication Date: 2020-02-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a kind of method for preparing isobutane dehydrogenation catalyst and by the method The prepared isobutane dehydrogenation catalyst and the application of the isobutane dehydrogenation catalyst prepared by the aforementioned method in the production of isobutene from isobutane dehydrogenation, the method provided by the present invention is easy to operate, environmentally friendly and low in cost, and by the method The prepared isobutane dehydrogenation catalyst can achieve better dehydrogenation activity, selectivity, stability and carbon deposition resistance under the condition of low precious metal loading

Method used

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  • Isobutane dehydrogenation catalyst employing silica gel as support, preparation method for isobutane dehydrogenation catalyst and application of isobutane dehydrogenation catalyst
  • Isobutane dehydrogenation catalyst employing silica gel as support, preparation method for isobutane dehydrogenation catalyst and application of isobutane dehydrogenation catalyst
  • Isobutane dehydrogenation catalyst employing silica gel as support, preparation method for isobutane dehydrogenation catalyst and application of isobutane dehydrogenation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0071] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0072] The ES955 silica gel A1 was calcined at 400° C. for 5 hours under the protection of nitrogen for thermal activation treatment to remove part of the hydroxyl groups and residual moisture of the ES955 silica gel A1 to obtain the thermally activated ES955 silica gel carrier B1.

[0073] 0.080g H 2 PtCl 6 ·6H 2 O and 0.457g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of deionized water to obtain a mixture solution, and 10 g of the heat-activated ES955 silica gel carrier B1 obtained after the aforementioned heat-activation treatment was immersed in the mixture solution, and after immersion at 25°C for 5 hours, evaporated with a rotary evaporator. The solvent water in the system was removed to obtain a solid product, which was placed in a drying oven at a temperature of 120° C. for 3 hours. Then in the muffle furnace, the temperature is 600 ℃ roasting 6h to obta...

Embodiment 2

[0088] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0089] The ES955 silica gel A2 was calcined at 800° C. for 3 hours under the protection of nitrogen for thermal activation treatment to remove part of the hydroxyl groups and residual moisture of the ES955 silica gel A2 to obtain the thermally activated ES955 silica gel carrier B2.

[0090] 0.080g H 2 PtCl 6 ·6H 2 O and 0.457g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100ml of deionized water to obtain a mixture solution, and 10 g of the heat-activated ES955 silica gel carrier B2 obtained after the aforementioned heat-activation treatment was immersed in the mixture solution, and after immersion at 25°C for 5 hours, evaporated with a rotary evaporator. The solvent water in the system was removed to obtain a solid product, which was placed in a drying oven at a temperature of 120° C. for 3 hours. Then in the muffle furnace, the temperature is 600 ℃ roasting 6h to obta...

Embodiment 3

[0096] The ES955 silica gel A3 was calcined at 600° C. for 4 hours under the protection of nitrogen for thermal activation treatment to remove part of the hydroxyl groups and residual moisture of the ES955 silica gel A3 to obtain the thermally activated ES955 silica gel carrier B3.

[0097] 0.080g H 2 PtCl 6 ·6H 2 O and 0.457g Zn(NO 3 ) 2 ·6H 2O was dissolved in 100ml of deionized water to obtain a mixture solution, and 10 g of the heat-activated ES955 silica gel carrier B3 obtained after the aforementioned heat-activation treatment was immersed in the mixture solution. The solvent water in the system was removed to obtain a solid product, which was placed in a drying oven at a temperature of 120° C. for 3 hours. Then in the muffle furnace, the temperature is 600 ℃ roasting 6h to obtain the isobutane dehydrogenation catalyst Cat-3 (based on the total weight of the isobutane dehydrogenation catalyst Cat-3, the content of the Pt component is based on the Pt element is 0.3%...

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Abstract

The invention relates to the field of catalysts and discloses an isobutane dehydrogenation catalyst employing silica gel as a support, a preparation method for the isobutane dehydrogenation catalyst,the isobutane dehydrogenation catalyst prepared by the method and an application of the isobutane dehydrogenation catalyst in isobutane dehydrogenated isobutene preparation. The preparation method forthe isobutane dehydrogenation catalyst comprises the steps: (a) subjecting the silica gel to thermal activating treatment, so as to obtain a thermal activated silica gel support; and (b) subjecting the thermal activated silica gel support obtained in the step (a) to dipping treatment in a solution containing a Pt ingredient precursor and a Zn ingredient precursor, and then, carrying out solvent removing treatment, drying and roasting sequentially, wherein the silica gel has a specific surface area of 200m<2> / g to 300m<2> / g, a pore volume of 1mL / g to 2mL / g, an average pore size of 10nm to 30nmand a mean particle size of 20 to 100 microns. According to the method, the operation is simple and convenient, the raw materials are readily available, and the obtained isobutane dehydrogenation catalyst can achieve relatively good dehydrogenation activity, selectivity, stability and resistance to carbon deposition under the condition that the load amount of noble metal is very small.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to an isobutane dehydrogenation catalyst whose carrier is silica gel, a preparation method thereof, an isobutane dehydrogenation catalyst prepared by the method, and an isobutane dehydrogenation catalyst prepared in isobutane Application in dehydrogenation of isobutene. Background technique [0002] Isobutylene is a very important organic chemical raw material, mainly used in the preparation of methyl tert-butyl ether, butyl rubber, methyl ethyl ketone, polyisobutylene, methyl methacrylate, isoprene, tert-butylphenol, tert-butylamine, 1, Various organic raw materials and fine chemicals such as 4-butanediol and ABS resin. The main source of isobutene is the by-product C4 fraction of naphtha steam cracking ethylene unit, the by-product C4 fraction of refinery fluid catalytic cracking (FCC) unit and the by-product tert-butanol (TAB ). [0003] In recent years, with the development and utili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/60B01J35/10C07C11/09C07C5/333
CPCB01J23/60C07C5/3337C07C2523/60B01J35/30B01J35/23B01J35/638B01J35/647B01J35/615C07C11/09
Inventor 刘红梅亢宇刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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