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Dehydrogenation catalyst as well as preparation method and application thereof

A technology of dehydrogenation catalyst and alumina, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of precious metal loss and low specific surface area, and promote Effect of dispersion, high reactivity, ability to suppress halogen poisoning

Active Publication Date: 2019-08-02
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application number is 871015137, and the publication date is October 12, 1988. A Chinese patent publication entitled "Platinum, Tin, Lithium, Sulfur Catalyst for Dehydrogenation of Saturated Hydrocarbons" discloses a dehydrogenation catalyst for saturated hydrocarbons , using the co-precipitation method to prepare alumina pellets and load platinum metal. The carrier of the catalyst has the disadvantages of low specific surface area and easy loss of loaded precious metals.

Method used

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  • Dehydrogenation catalyst as well as preparation method and application thereof
  • Dehydrogenation catalyst as well as preparation method and application thereof
  • Dehydrogenation catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation of Ga-containing perovskite includes the following steps:

[0038] Step 1, dissolving the raw materials in lye, and continuing to add lye until the pH is 9.0 to obtain a Ga-containing perovskite precursor; the lye is ammonia water with a mass concentration of 10%; the raw materials are lanthanum nitrate and nitric acid Strontium, cobalt nitrate and gallium nitrate, the ratio of the amount of substance of the lanthanum nitrate, strontium nitrate, cobalt nitrate and gallium nitrate is 5:5:3:7;

[0039] Step 2, the Ga-containing perovskite precursor described in step 1 is sequentially dried, roasted, and ground to obtain a molecular formula of La 0.5 Sr 0.5 co 0.3 Ga 0.7 o 3 Ga-containing perovskite; the drying temperature is 90°C, and the drying time is 10h; the roasting atmosphere is air atmosphere, the roasting temperature is 800°C, and the roasting time is 5h; the Ga-containing The particle size of the perovskite is 200 mesh.

[0040] The XRD spec...

Embodiment 2

[0049] The preparation of Ga-containing perovskite includes the following steps:

[0050] Step 1, dissolving the raw materials in lye, and continuing to add lye until the pH is 10.5 to obtain a Ga-containing perovskite precursor; the lye is ammonia water with a mass concentration of 20%; the raw materials are lanthanum nitrate and nitric acid Strontium, cobalt nitrate and gallium nitrate, the ratio of the amount of substance of the lanthanum nitrate, strontium nitrate, cobalt nitrate and gallium nitrate is 5:5:3:7;

[0051] Step 2, the Ga-containing perovskite precursor described in step 1 is sequentially dried, roasted, and ground to obtain a molecular formula of La 0.5 Sr 0.5 co 0.3 Ga 0.7 o 3 Ga-containing perovskite; the drying temperature is 110°C, and the drying time is 15h; the roasting atmosphere is air atmosphere, the roasting temperature is 1000°C, and the roasting time is 10h; the Ga-containing The particle size of the perovskite is 300 mesh.

[0052] A method...

Embodiment 3

[0060] The preparation of Ga-containing perovskite includes the following steps:

[0061] Step 1, dissolving the raw materials in lye, and continuing to add lye until the pH is 9.5 to obtain a Ga-containing perovskite precursor; the lye is ammonia water with a mass concentration of 15%; the raw materials are lanthanum nitrate and nitric acid Strontium, cobalt nitrate and gallium nitrate, the ratio of the amount of substance of the lanthanum nitrate, strontium nitrate, cobalt nitrate and gallium nitrate is 5:5:3:7;

[0062] Step 2, the Ga-containing perovskite precursor described in step 1 is sequentially dried, roasted, and ground to obtain a molecular formula of La 0.5 Sr 0.5 co 0.3 Ga 0.7 o 3 Ga-containing perovskite; the drying temperature is 100°C, and the drying time is 12h; the roasting atmosphere is air atmosphere, the roasting temperature is 900°C, and the roasting time is 8h; the Ga-containing The particle size of perovskite is 250 mesh.

[0063] A method for pr...

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Abstract

The invention discloses a dehydrogenation catalyst which comprises modified aluminum oxide as a carrier, Pt as an active component and Ga-containing perovskite as aids, wherein the mass percentage content of Pt in the dehydrogenation catalyst is 0.1-0.5%, and the mass percentage of Ga is 0.4-3.1%. The invention further provides a method for preparing the dehydrogenation catalyst and the application of the dehydrogenation catalyst in alkane dehydrogenation to prepare olefin. The catalyst is simple in preparation method, and the dehydrogenation catalyst prepared by using the preparation method has high catalysis performance in alkane dehydrogenation. The dehydrogenation catalyst disclosed by the invention has the characteristics of being high in activity, good in carbon prevention and good in stability, and the preparation method is simple and easy to achieve, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of dehydrogenation catalysts, and in particular relates to a dehydrogenation catalyst and its preparation method and application. Background technique [0002] The dehydrogenation catalyst is mainly used for the dehydrogenation of propane to propylene, butane to butadiene or ethylbenzene to styrene. Propylene is the raw material of polypropylene, butadiene is the raw material of synthetic rubber or acrylic fiber, and styrene is Raw materials for synthetic resins. The dehydrogenation reaction is a reaction with a reversible reaction process, endothermicity, and an increase in the number of molecules. The conditions of high temperature and low pressure are more conducive to the reaction. At present, the dehydrogenation reaction is usually carried out at a temperature of 300°C to 900°C, and the reaction process is accompanied by side reactions. The commonly used dehydrogenation catalysts are prone to carbon de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/89B01J35/10B01J37/08B01J37/02C07C5/333C07C11/06
CPCB01J23/83B01J23/896B01J23/002B01J37/082B01J37/0201C07C5/3332B01J2523/00B01J35/638B01J35/615B01J35/651B01J2523/24B01J2523/32B01J2523/3706B01J2523/845C07C11/06Y02P20/52
Inventor 翟康张磊王昭文张涵张力徐会伍李岳锋万克柔曾永康
Owner XIAN CATALYST NEW MATERIALS CO LTD
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