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Catalyst for preparing acrylic acid by selective oxidation of propane and preparation method thereof

A catalyst and selective technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of large catalyst particles, low catalytic activity, and irregular arrangement, and achieve uniform particle size. The effect of high catalytic activity and rapid reaction

Active Publication Date: 2016-04-27
临沂星火知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the methods for preparing Mo-V-Te-Nb-O catalysts mainly include coprecipitation method, slurry method, solution method, hydrothermal method, etc. The obtained catalysts generally have large particles, uneven structure, irregular arrangement, catalytic Disadvantages such as low activity and poor reproducibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A catalyst for the selective oxidation of propane to prepare acrylic acid, characterized in that the general formula is MoaVbTecNbdOx, wherein Mo, V, Te, and Nb are active components, and a:b:c:d is 1:0.3:0.23:0.12.

[0026] The method for preparing described catalyst, comprises the steps:

[0027] (1) Dissolve 5.5g of anhydrous citric acid in 100mL of deionized water and stir, heat in a water bath to 40°C, add 1.715g of niobic acid after the solution is clarified, continue to stir and cool down to 25°C, and obtain a colorless solution A for use; Add 14.2g of ammonium molybdate into water, heat and stir in a water bath at 50°C to obtain a colorless solution, continue heating and stirring and add 2.283g of ammonium metavanadate to obtain orange solution B; add 4.25g of telluric acid to the solution In B, dissolve and cool to obtain red solution C; add solution C to solution A under continuous stirring, add 2g of ammonium nitrate after mixing, adjust the pH value to 6, an...

Embodiment 2

[0032] A catalyst for the selective oxidation of propane to prepare acrylic acid, characterized in that the general formula is MoaVbTecNbdOx, wherein Mo, V, Te, and Nb are active components, and a:b:c:d is 1:0.3:0.26:0.12.

[0033] The method for preparing described catalyst, comprises the steps:

[0034] (1) Dissolve 6g of anhydrous citric acid in 100mL of deionized water and stir, heat in a water bath to 40°C, add 1.715g of niobic acid after the solution is clarified, continue to stir and cool down to 25°C to obtain a colorless solution A for later use; Add 14.2g of ammonium molybdate to water, heat and stir in a water bath at 50°C to obtain a colorless solution, continue heating and stirring and add 2.283g of ammonium metavanadate to obtain orange solution B; add 4.80g of telluric acid to solution B After dissolving, cool down to obtain red solution C; add solution C to solution A under continuous stirring, mix well, add 3g of ammonium nitrate, adjust the pH value to 6, and...

Embodiment 3

[0039] A catalyst for the selective oxidation of propane to prepare acrylic acid, characterized in that the general formula is MoaVbTecNbdOx, wherein Mo, V, Te, and Nb are active components, and a:b:c:d is 1:0.25:0.23:0.12.

[0040] The method for preparing described catalyst, comprises the steps:

[0041] (1) Dissolve 5g of anhydrous citric acid in 100mL of deionized water and stir, heat in a water bath to 40°C, add 1.715g of niobic acid after the solution is clarified, continue to stir and cool down to 25°C to obtain a colorless solution A for use; Add 14.2g of ammonium molybdate to water, heat and stir in a water bath at 50°C to obtain a colorless solution, continue heating and stirring and add 1.902g of ammonium metavanadate to obtain orange solution B; add 4.25g of telluric acid to solution B After dissolving, cool to obtain red solution C; add solution C to solution A under continuous stirring, mix well, add 1.5g of ammonium nitrate, adjust the pH value to 6, and obtain so...

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PUM

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Abstract

The invention belongs to the technical field of petrochemical engineering, in particular relates to a catalyst for preparing acrylic acid through propane selective oxidation and a preparation method of the catalyst. The catalyst has a formula of MoaVbTecNbdOx, wherein Mo, V, Te and Nb are active components; a : b : c : d is 1 : (0.2-0.3) : (0.2-0.3) : (0.1-0.2). When the catalyst is adopted to prepare the acrylic acid, the conversion rate of the propane and the once-through yield of the acrylic acid are high.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a catalyst for preparing acrylic acid by selective oxidation of propane and a preparation method thereof. Background technique [0002] With the gradual expansion of the petrochemical industry, the use of low-carbon alkanes to prepare petrochemical raw materials with higher added value has gradually become a research hotspot. Propane is relatively abundant in reserves and widely exists in natural gas, oilfield gas and refinery gas. However, due to the relatively low reactivity of propane, it is not easy to activate, so a large amount of cheap propane has not been rationally developed and utilized so far. Most of them are directly burned as fuel, and a few are used to prepare ethylene and propylene. [0003] Acrylic acid and its derivative acrylate are important chemical raw materials, widely used in the production of coatings, chemical fibers, textiles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057C07C57/05C07C51/215
Inventor 张成如
Owner 临沂星火知识产权服务有限公司
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