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Method of preparing catalyst for production of acrylic acid using reactive ball milling

A catalyst and acrylic acid technology, applied in chemical instruments and methods, catalyst activation/preparation, heterogeneous catalyst chemical elements, etc., can solve problems such as low activity and low selectivity, and achieve high propane conversion rate and high acrylic acid selectivity Effect

Active Publication Date: 2013-03-27
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of low activity and low selectivity of 4-component catalysts for the production of acrylic acid, the present inventors attempted to remove impurities inevitably generated during catalyst synthesis or calcination to improve catalytic activity, and as a result, the present inventors accomplished the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1 g of the catalyst prepared in Comparative Example 1 was charged into a 60 ml container, and 15 zirconia balls with a diameter of 10 mm and 80 zirconia balls with a diameter of 5 mm were added thereto. 15 ml of water was added thereto, followed by ball milling at 150 rpm for 15 hours.

[0036] After ball milling, the catalyst and solvent are recovered. 30 cc of solvent was added thereto, followed by centrifugation at 4000 rpm for 2 hours. To detect whether impurities are leached from the catalyst, recover and observe the centrifuged solution. It was tan in color, indicating that impurities were leached. The catalyst precipitated at the bottom of the bottle was recovered, dried at 80 °C for 4 hours, and then ground in agate to obtain the final catalyst.

Embodiment 2

[0038] 1 g of the catalyst prepared in Comparative Example 1 was charged into a 60 ml container, and 15 zirconia balls with a diameter of 10 mm and 80 zirconia balls with a diameter of 5 mm were added thereto. 15 ml of ethanol was added thereto, followed by ball milling at 150 rpm for 15 hours.

[0039] After ball milling, the catalyst and solvent are recovered. 30 cc of solvent was added thereto, followed by centrifugation at 4000 rpm for 2 hours. To detect whether impurities are leached from the catalyst, recover and observe the centrifuged solution. It was tan in color, indicating that impurities were leached. The catalyst precipitated at the bottom of the bottle was recovered, dried at 80 °C for 4 hours, and then ground in agate to obtain the final catalyst.

Embodiment 3

[0041] 1 g of the catalyst prepared in Comparative Example 1 was charged into a 60 ml container, and 15 zirconia balls with a diameter of 10 mm and 80 zirconia balls with a diameter of 5 mm were added thereto. 15 ml of 1-propanol was added thereto, followed by ball milling at 150 rpm for 15 hours.

[0042] After ball milling, the catalyst and solvent are recovered. 30 cc of solvent was added thereto, followed by centrifugation at 4000 rpm for 2 hours. To detect whether impurities are leached from the catalyst, recover and observe the centrifuged solution. It was tan in color, indicating that impurities were leached. The catalyst precipitated at the bottom of the bottle was recovered, dried at 80 °C for 4 hours, and then ground in agate to obtain the final catalyst.

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Abstract

The present invention provides a method of preparing an oxide catalyst for the production of acrylic acid containing the steps of preparing a catalyst precursor from the solution mixture comprising molybdenum salt, vanadium salt, tellurium salt and niobium salt; and then drying and calcining the precursor. The present invention is characterized by eliminating impurities from the prepared catalyst by ball milling in the presence of a polar solvent. Therefore, according to the method of the present invention, an oxide catalyst for the production of acrylic acid with excellent catalytic activity can be prepared.

Description

technical field [0001] The present invention relates to a method for preparing an oxide catalyst for acrylic acid, more specifically, relates to a method for preparing an oxide catalyst for acrylic acid, which is characterized in that, in the presence of a polar solvent, ball milling The catalyst was prepared to remove impurities to produce acrylic acid with higher activity than acrylic acid prepared by conventional methods. Background technique [0002] For the production of acrylic acid by direct oxidation of propane, extensive research has been conducted on 4-component composite oxide catalysts such as MoVTeNbO. US Patent No. 5,380,933 reported the synthesis of acrylic acid with a high selectivity of 60.5% using a MoVTeNbO type 4-component catalyst. Since then, attempts have been made to increase the catalytic activity or to modify the synthesis of the catalyst by adding additional components to the basic 4 components. However, synthetic methods using co-catalysts or al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/84
CPCB01J37/06C07C51/215B01J37/0236B01J37/0018B01J23/002B01J27/0576B01J37/0036B01J2523/00C07C57/04B01J2523/55B01J2523/56B01J2523/64B01J2523/68B01J23/16B01J23/84B01J27/057B01J37/08
Inventor 车京龙金镇道宋慇擎赵贤朱
Owner LG CHEM LTD
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