Preparation method of catalyst for preparing propylene by virtue of propane dehydrogenation

A propane dehydrogenation and catalyst technology, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, hydrocarbons, etc., can solve the problems of pollution and high product cost, reduce energy consumption, reduce preparation costs, and reduce calcination temperature Effect

Inactive Publication Date: 2015-02-25
华玉叶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has high propane conversion rate, propylene selectivity and stability for the reaction of propane dehydrogenation to propylene, and can overcome the defects of serious pollution and high product cost in the preparation method of dehydrogenation catalyst in the prior art, and provides a Preparation method of dehydrogenation catalyst with no pollution in preparation process and low product cost

Method used

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  • Preparation method of catalyst for preparing propylene by virtue of propane dehydrogenation
  • Preparation method of catalyst for preparing propylene by virtue of propane dehydrogenation
  • Preparation method of catalyst for preparing propylene by virtue of propane dehydrogenation

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A method for preparing a catalyst for the dehydrogenation of propane to propylene, comprising an alumina carrier and active components with the following contents based on the carrier as a calculation basis:

[0022]

[0023] The balance is impurities;

[0024] The molar ratio of cerium or samarium to platinum group metal is 7:8; the platinum group metal is platinum; the halogen is chlorine;

[0025] The alumina carrier is impregnated with a soluble cerium or samarium compound solution, a calcium silicate salt solution, dried and calcined, and then impregnated with a platinum group metal compound and a hydrogen halide solution, dried, calcined, and then impregnated with a potassium salt solution. Drying and calcining; then mixing the above-mentioned corresponding amounts of cerium oxide and pore-forming agent, and calcining at 600° C. for 3 hours to obtain the catalyst for the dehydrogenation of propane to propylene.

Embodiment 2

[0027] A method for preparing a catalyst for the dehydrogenation of propane to propylene, comprising an alumina carrier and active components with the following contents based on the carrier as a calculation basis:

[0028]

[0029] The balance is impurities;

[0030] The molar ratio of cerium or samarium to platinum group metal is 7:8; the platinum group metal is platinum; the halogen is chlorine;

[0031] The alumina carrier is impregnated with a soluble cerium or samarium compound solution, a calcium silicate salt solution, dried and calcined, and then impregnated with a platinum group metal compound and a hydrogen halide solution, dried, calcined, and then impregnated with a potassium salt solution. Drying and calcining; then mixing the above-mentioned corresponding amounts of cerium oxide and pore-forming agent, and calcining at 600° C. for 3 hours to obtain the catalyst for the dehydrogenation of propane to propylene.

Embodiment 3

[0033] A method for preparing a catalyst for the dehydrogenation of propane to propylene, comprising an alumina carrier and active components with the following contents based on the carrier as a calculation basis:

[0034]

[0035] The balance is impurities;

[0036] The molar ratio of cerium or samarium to platinum group metal is 7:8; the platinum group metal is platinum; the halogen is chlorine;

[0037] The alumina carrier is impregnated with a soluble cerium or samarium compound solution, a calcium silicate salt solution, dried and calcined, and then impregnated with a platinum group metal compound and a hydrogen halide solution, dried, calcined, and then impregnated with a potassium salt solution. Drying and calcining; then mixing the above-mentioned corresponding amounts of cerium oxide and pore-forming agent, and calcining at 600° C. for 3 hours to obtain the catalyst for the dehydrogenation of propane to propylene.

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Abstract

The invention discloses a preparation method of a catalyst for preparing propylene by virtue of propane dehydrogenation. The catalyst comprises an aluminum oxide carrier and active components with the following contents in percentage by mass calculated based on the carrier: 1-3% of calcium silicate salt, 1-3% of cerium oxide, 0.1-2.0% of a platinum group metal, 0.5-5.0% of potassium, 0.2-5.0% of cerium or samarium, 0.3-10% of halogen, 1-5% of a pore forming agent and the balance of impurities, wherein the molar ratio of cerium or samarium to the platinum group metal is 7:8; the platinum group metal is platinum; and halogen is chlorine. The preparation method comprises the following steps: soaking, drying and roasting the aluminum oxide carrier by using a soluble compound solution of cerium or samarium and a calcium silicate salt solution, then soaking, drying and roasting by using a solution containing compounds of the platinum group metal and hydrogen halide, and then soaking, drying and roasting by using a potassium salt solution; and then mixing cerium oxide and the pore forming agent with corresponding amounts, and roasting for 3 hours at 600 DEG C to obtain the catalyst for preparing propylene by virtue of propane dehydrogenation.

Description

Technical field [0001] The invention belongs to the field of dehydrogenation catalysts, and specifically relates to the field of cerium-containing alkyl aromatic hydrocarbon dehydrogenation catalysts. Specifically, it is a multimetallic catalyst containing platinum group metals using alumina as a carrier and a preparation method thereof. Background technique [0002] Propylene is an important basic chemical raw material and is widely used in the production of polypropylene, cumene, carbonyl alcohol, propylene oxide, acrylic acid, acrylonitrile and other chemical products. In the prior art, the process of preparing a dehydrogenation catalyst containing cerium oxide is to mix cerium nitrate with iron, potassium, molybdenum and other elemental compounds and some additives, and after kneading, calcination and other processes, the finished dehydrogenation catalyst is obtained. The cerium nitrate in the mixture undergoes decomposition reaction during the calcination process, and finall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13C07C11/06C07C5/333
CPCY02P20/52
Inventor 华玉叶
Owner 华玉叶
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