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Method for preparing dehydrogenation catalyst

A technology of dehydrogenation catalyst and cerium oxide, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as pollution and high product cost, and achieve energy reduction Consumption, the effect of reducing the preparation cost

Active Publication Date: 2010-03-03
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is: to overcome the defects of serious pollution and high product cost in the dehydrogenation catalyst preparation method in the prior art, and to provide a preparation method of a dehydrogenation catalyst with no pollution in the preparation process and low product cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Firstly, the content of cerium oxide, iron oxide, potassium carbonate, magnesium oxide, dicalcium silicate, tricalcium silicate, and sodium carboxymethyl cellulose in the rare earth containing cerium oxide is determined, so that each content in the mixture in the next step can be determined. The content of raw materials determines the amount of rare earth and the amount of each raw material that needs to be added to the rare earth. The content of cerium oxide in the obtained rare earth is 20wt%.

[0013] Next, potassium carbonate, iron oxide, magnesium oxide, dicalcium silicate, tricalcium silicate, and sodium carboxymethylcellulose are added to the rare earth, and after fully mixing, a mixture is obtained and the content of cerium oxide in the mixture is 10wt%, the content of iron oxide is 60wt%, the content of potassium carbonate is 15wt%, the total content of dicalcium silicate and tricalcium silicate is 10wt%, the content of magnesium oxide is 3wt%, and the content ...

Embodiment 2

[0017] First, the content of cerium oxide, iron oxide, potassium carbonate, potassium bicarbonate, dicalcium silicate, tricalcium silicate, and scallops in the rare earth containing cerium oxide is determined, so that the content of each raw material in the mixture in the next step can be determined. , to determine the amount of rare earth and the amount of each raw material that needs to be added to the rare earth. The content of cerium oxide in the obtained rare earth is 15wt%.

[0018] Next, potassium carbonate, potassium bicarbonate, iron oxide, dicalcium silicate, tricalcium silicate, and safflower are added to the rare earth, and after being fully mixed, the mixture is obtained and the content of cerium oxide in the mixture is 15wt%. The content of iron oxide is 40wt%, the total content of potassium carbonate and potassium bicarbonate is 25wt%, the total content of dicalcium silicate and tricalcium silicate is 18wt%, the content of turmeric is 1wt%, and the balance is no...

Embodiment 3

[0022] Firstly, the contents of cerium oxide, iron oxide, iron carbonate, potassium carbonate, magnesium oxide, dicalcium silicate, tricalcium silicate, and cellulose powder in the rare earth containing cerium oxide are determined, so that the contents of each in the mixture in the next step can be determined. The content of raw materials determines the amount of rare earth and the amount of each raw material that needs to be added to the rare earth. The content of cerium oxide in the obtained rare earth is 15wt%.

[0023] Next, potassium carbonate, iron oxide and iron carbonate, magnesium oxide, dicalcium silicate, tricalcium silicate, and cellulose powder are added to the rare earth, and after fully mixing, a mixture is obtained and the content of cerium oxide in the mixture is 5wt%, the total content of iron oxide and iron carbonate is 70wt%, the content of potassium carbonate is 5wt%, the content of magnesium oxide is 1wt%, the total content of dicalcium silicate and trica...

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Abstract

The invention relates to a method for preparing a dehydrogenation catalyst, which comprises the following steps of: (a) measuring the content of specific components of rare earth containing cerium oxide; (b) adding iron oxide and / or an iron oxide precursor, potassium oxide and / or a potassium oxide precursor, a silicate calcium salt and a pore-forming material into the rare earth, and mixing the materials to form a mixture; (c) mixing the mixture with a proper amount of water, kneading the mixture sufficiently, and extruding the mixture into bars to obtain preforms; and (d) drying and calcinating the preforms to obtain the finished product of the dehydrogenation catalyst, wherein the specific components to be measured in the step (a) comprise the cerium oxide in the rare earth and the compounds which are the same as the materials added in the step (b). The method for preparing the dehydrogenation catalyst has the advantages of no pollution and low cost.

Description

technical field [0001] The invention belongs to the field of dehydrogenation catalysts, in particular to the field of cerium-containing alkyl aromatic hydrocarbon dehydrogenation catalysts. Background technique [0002] In the field of alkylaromatic dehydrogenation catalysts, the improvement of conversion rate and dehydrogenation selectivity mainly depends on the selection of dehydrogenation catalysts. Traditional dehydrogenation catalysts mainly include two series of dehydrogenation catalysts containing chromium and cerium. However, since chromium is a carcinogen, it will cause environmental pollution and is greatly restricted in industrial production. The main object of research and production. [0003] 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, cal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/02C07C5/367C07C15/46B01J35/00
Inventor 宋建华陈远林王立新黄素梅
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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