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Preparation method of catalyst for preparing propene through propane dehydrogenation

A propane dehydrogenation and catalyst technology, which is applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of pollution and high product cost, and achieve the effects of cleaning the preparation process, reducing the preparation cost, and reducing the calcination temperature.

Inactive Publication Date: 2016-01-13
WUXI QINGYANG MACHINERY MFG
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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 propene through propane dehydrogenation
  • Preparation method of catalyst for preparing propene through propane dehydrogenation
  • Preparation method of catalyst for preparing propene through propane dehydrogenation

Examples

Experimental program
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Embodiment 1

[0020] A method for preparing a catalyst for propane dehydrogenation to propylene, comprising an alumina carrier and an active component whose content is as follows based on the carrier:

[0021]

[0022]

[0023] The molar ratio of cerium or samarium to the platinum group metal is 7:8; the platinum group metal is platinum; the halogen is chlorine;

[0024] The alumina carrier is impregnated with a soluble cerium or samarium compound solution, a calcium silicate salt solution, dried, calcined, and then impregnated with a platinum group metal compound and hydrogen halide solution, dried, calcined, and then impregnated with a potassium salt solution. Drying and calcining; then mixing the above corresponding amount of cerium oxide and pore-forming agent, calcining at 600°C for 3 hours to obtain the catalyst for propane dehydrogenation to propylene.

Embodiment 2

[0026] A method for preparing a catalyst for propane dehydrogenation to propylene, comprising an alumina carrier and an active component whose content is as follows based on the carrier:

[0027]

[0028] The molar ratio of cerium or samarium to the platinum group metal is 7:8; the platinum group metal is platinum; the halogen is chlorine;

[0029] The alumina carrier is impregnated with a soluble cerium or samarium compound solution, a calcium silicate salt solution, dried, calcined, and then impregnated with a platinum group metal compound and hydrogen halide solution, dried, calcined, and then impregnated with a potassium salt solution. Drying and calcining; then mixing the above corresponding amount of cerium oxide and pore-forming agent, calcining at 600°C for 3 hours to obtain the catalyst for propane dehydrogenation to propylene.

Embodiment 3

[0031] A method for preparing a catalyst for propane dehydrogenation to propylene, comprising an alumina carrier and an active component whose content is as follows based on the carrier:

[0032]

[0033] The molar ratio of cerium or samarium to the platinum group metal is 7:8; the platinum group metal is platinum; the halogen is chlorine;

[0034] The alumina carrier is impregnated with a soluble cerium or samarium compound solution, a calcium silicate salt solution, dried, calcined, and then impregnated with a platinum group metal compound and hydrogen halide solution, dried, calcined, and then impregnated with a potassium salt solution. Drying and calcining; then mixing the above corresponding amount of cerium oxide and pore-forming agent, calcining at 600°C for 3 hours to obtain the catalyst for propane dehydrogenation to propylene.

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Abstract

Provided is a preparation method of a catalyst for preparing propene through propane dehydrogenation. The catalyst comprises an alumina carrier and active components which take the carrier as the calculation basis. The active components comprise, by mass, 1%-3% of calcium silicate, 1%-3% of cerium oxide, 0.1%-2.0% of 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 pore-forming agents and the balance impurities, wherein the molar ratio of the cerium or samarium to the platinum group metal is 7 to 8, the platinum group metal is platinum, and the halogen is chlorine; the alumina carrier is steeped through a soluble cerium or samarium compound solution and a calcium silicate solution, after drying and roasting are conducted, the alumina carrier is steeped through a solution of compounds containing the platinum group metal and halogen hydride, after drying and roasting are conducted, the treated alumina carrier is steeped through a potassium salt solution, and drying and roasting are conducted; the corresponding amount of the cerium oxide and the pore-forming agents are mixed, and the catalyst for preparing the propene through propane dehydrogenation is obtained after roasting is conducted for three hours at 600 DEG C.

Description

technical field [0001] The invention belongs to the field of dehydrogenation catalysts, in particular to the field of cerium-containing alkylaromatic dehydrogenation catalysts, in particular to a platinum-group metal-containing multimetal catalyst with alumina as a carrier and a preparation method thereof. Background technique [0002] Propylene is an important basic chemical raw material, widely used in the production of polypropylene, cumene, carbonyl alcohol, propylene oxide, acrylic acid, acrylonitrile and other chemical products. The process of preparing a dehydrogenation catalyst containing cerium oxide in the prior art is to mix cerium nitrate with compounds of elements such as iron, potassium, molybdenum, and some additives, and then obtain a finished dehydrogenation catalyst after kneading, calcination, etc., the original The cerium nitrate in the mixture undergoes a decomposition reaction during the calcination process, and finally forms the active component cerium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13C07C5/333C07C11/06
CPCY02P20/52
Inventor 唐靖岚
Owner WUXI QINGYANG MACHINERY MFG
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