Process for producing composite oxide catalyst and use thereof

A technology of composite oxides and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to solve the problem of low activity, high catalytic activity, and easy operation Effect

Inactive Publication Date: 2007-02-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned catalyzer is mostly used in high temperature dehydrogenation reaction, and the composite oxide catalyst that the present invention reports is used for low temperature reaction has not yet been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0012] Measure 20ml of absolute ethanol into a beaker, and slowly add 10.9ml of butyl titanate dropwise under vigorous stirring. After stirring for 15 minutes, slowly add 480 μl 12mol / L HCl dropwise, and after 5 minutes, add dropwise 40 μl 8mol / L HCl; continue stirring for 30 minutes and weigh 0.197g NH 4 VO 3 , and dissolved with 0.25mol / L oxalic acid solution, and after complete dissolution, add 4ml of absolute ethanol dropwise; at this point, slowly add the solution dropwise into the ethanol solution of butyl titanate; continue stirring until gelling. The colloid is placed in air for aging. After the aging is completed, the temperature is raised to the set temperature of 550°C at a rate of 0.5°C / min and roasted for 4 hours. Placed in a desiccator for use, the catalyst is marked as A. The activity of the catalyst was evaluated in a continuous-flow quartz tubular fixed-bed reactor, the catalyst dosage was 200mg, the average particle size was 200μm; the reaction temperature ...

Embodiment approach 2

[0014] Measure 20ml of absolute ethanol in a beaker, add 2ml of glacial acetic acid dropwise, and slowly add 10.9ml of butyl titanate dropwise under vigorous stirring. After stirring for 15 minutes, slowly add 480 μl 12mol / L HCl dropwise, and after 5 minutes, add dropwise 40 μl 8mol / L HCl; continue stirring for 30 minutes and weigh 0.117g NH 4 VO 3 , and dissolved with 0.25mol / L oxalic acid solution, and after complete dissolution, add 4ml of absolute ethanol dropwise; at this point, slowly add the solution dropwise into the ethanol solution of butyl titanate; continue stirring until gelling. The colloid was aged in the air. After the aging was completed, the temperature was raised to the set temperature of 550°C at a rate of 0.5°C / min and roasted for 4 hours, and placed in a desiccator for use. The catalyst was marked as B. The catalyst consumption is 250 mg, and the average particle diameter is 200 μm. The catalyst activity evaluation conditions are the same as those in Emb...

Embodiment approach 3

[0016] Measure 20ml of absolute ethanol into a beaker, add 0.15ml of acetylacetone dropwise, and slowly add 10.9ml of butyl titanate dropwise under vigorous stirring. After stirring for 15 minutes, slowly add 480 μl 12mol / L HCl dropwise, and after 5 minutes, add dropwise 40 μl 8mol / L HCl; continue stirring for 30 minutes and weigh 0.197g NH 4 VO 3 , and dissolved with 0.25mol / L oxalic acid solution, and after complete dissolution, add 4ml of absolute ethanol dropwise; at this point, slowly add the solution dropwise into the ethanol solution of butyl titanate; continue stirring until gelling. The colloid is placed in air for aging. After the aging is completed, the temperature is raised to the set temperature of 550°C at a rate of 0.5°C / min and roasted for 4 hours. Placed in a desiccator for use, the catalyst is marked as C. The catalyst consumption is 300 mg, and the average particle size is 200 μm. The catalyst activity evaluation conditions are the same as those in Embodim...

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Abstract

The invention relates to a method for preparing composite oxide catalyst, and its application for preparing phenylethene at low temperature with carbon dioxide phenetole, to solve the problem that the activity of catalyst is low. The invention uses gel-colloid method, to age, dry and baked to prepare the schreyerite composite oxide catalyst whose base is Titania, then dehydrogenate ethylbenzene at low temperature with carbon dioxide gas to prepare phenylethene; and the catalyst has better phenylethene transfer rate and phenylethene selection property.

Description

technical field [0001] A preparation method and application of a composite oxide catalyst belong to the field of preparation and application of oxide catalysts, and specifically relate to a preparation method of a composite oxide catalyst and an application method in the reaction of low-temperature carbon dioxide oxidation of ethylbenzene and dehydrogenation of styrene to prepare styrene . Background technique [0002] Since Dow and BASF jointly developed the ethylbenzene catalytic dehydrogenation method and industrialized it in 1937, after nearly 70 years of exploration and research, the process, catalyst and reactor of ethylbenzene catalytic dehydrogenation to styrene have been mature, but the material consumption And energy consumption has been reduced to a level close to the limit value. Ethylbenzene carbon dioxide oxidative dehydrogenation (CO 2 -EBDH) to styrene is a new type of research method proposed for thermodynamically controlled reactions in recent years. This...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J21/06C07C15/46C07C5/42
Inventor 李文英李晓红冯杰宋瑞伟谢克昌
Owner TAIYUAN UNIV OF TECH
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