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Novel glycerol dehydration catalyst and production method therefor

A manufacturing method and catalyst technology, applied in the direction of catalyst activation/preparation, organic chemical methods, chemical instruments and methods, etc., can solve the problems of unusable acrolein yield and achieve high yield effect

Inactive Publication Date: 2013-07-10
NIPPON KAYAKU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the highest yield was only 45%
Therefore, such acrolein yields obtained by using niobium oxide cannot be used in practical industrial installations

Method used

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  • Novel glycerol dehydration catalyst and production method therefor
  • Novel glycerol dehydration catalyst and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1 (preparation of NbO x )

[0067] 7.4529g niobium hydrogen oxalate (Nb(HC 2 o 4 ) 5 ·nH 2 O) Disperse in 25ml of distilled water and ultrasonically vibrate for 10 minutes. The resulting dispersion was introduced into an autoclave and subjected to hydrothermal synthesis at 175 °C for three days. The resulting slurry was vacuum filtered, washed with distilled water and then dried overnight at 80 °C to obtain NbO x catalyst powder. figure 1 The X-ray diffraction pattern of the obtained catalyst is shown. figure 1 A peak is shown at 2θ=22.6 and 2θ=46.1 each.

[0068] Catalyst Reactivity Evaluation

[0069] The reactivity of the resulting catalysts was evaluated in a fixed bed operated by atmospheric pressure of the reactants. The catalyst powder is press-molded and passed through a sieve to obtain particles with a particle diameter of 9 to 12 mesh. 10 cc of particles were packed in a reaction tube (20 mm in diameter) made of SUS to form a catalyst be...

Embodiment 2

[0074] Example 2 (Preparation W 0.5 Nb 1.0 o x )

[0075] 1.1376g niobium oxide (Nb 2 o 5 ·nH 2 O) Disperse in 25 ml of distilled water and ultrasonically vibrate for 10 minutes to prepare a niobium oxide dispersion. In a separate flask, 0.7660 g of ammonium tungstate ((NH 4 ) 6 [H 2 W 12 o 40 ] nH 2 O) Dissolve in 20 ml distilled water. The obtained ammonium tungstate aqueous solution was slowly added to the niobium oxide dispersion. The resulting mixture was introduced into an autoclave and subjected to hydrothermal synthesis at 175 °C for three days. The resulting slurry was vacuum filtered, washed with distilled water and then dried overnight at 80 °C to obtain NbO x catalyst powder. The catalyst shows figure 1 The X-ray diffraction pattern, which has a peak at 2θ=22.6 and 2θ=46.1. This confirms that the obtained crystal structure is consistent with the NbO x similar.

[0076] Catalyst Reactivity Evaluation

[0077] The reactivity of the obtained cata...

Embodiment 3

[0078] Example 3 (Making Cs exchanged for W 0.5 Nb 1.0 o x )

[0079] Ion exchange of Cs was performed as follows: 0.2612 g of CsCl was added to 25 ml of distilled water. With the WNbO obtained in 1.0g embodiment 2 x It was added to the resulting aqueous CsCl solution and stirred at room temperature for 24 hours. Then, the resulting slurry was vacuum filtered, washed with distilled water and then dried overnight at 80 °C to obtain Cs-exchanged WNbO x .

[0080] Catalyst Reactivity Evaluation

[0081] The reactivity of the obtained catalyst was evaluated by the same method as in Example 1, and the results are summarized in Table 1.

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Abstract

Provided is a novel catalyst that can produce acrolein and acrylic acid in high yields using glycerol as starting material. The disclosed glycerol dehydration catalyst has niobic oxide synthesized by hydrothermal synthesis as the main component.

Description

technical field [0001] The present invention relates to a novel catalyst for dehydration. In particular, the present invention relates to a novel catalyst used in a catalytic dehydration reaction of glycerol in a liquid phase or a gas phase to produce acrolein and acrylic acid, and a method for producing the same. Background technique [0002] Currently, an industrial production method for producing unsaturated aldehydes and unsaturated carboxylic acids such as acrolein and acrylic acid is a gas-phase catalytic oxidation method of propylene used as a starting material. However, in consideration of global warming and depletion of oil, development of another technology for producing fuel and organic products from biological resources not dependent on fossil resources has been demanded in recent years. Examples of such products are bioethanol and biodiesel obtained by conversion of fats and oils, the production of which exceeds 20 million tons / year. Demand for them is expecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J23/20C07C45/38C07C47/22C07B61/00C07C27/00C07C51/235C07C57/04
CPCB01J23/002B01J23/30B01J37/0036B01J37/0063B01J37/009B01J37/038B01J37/343C07C45/52C07C51/235B01J23/20B01J2523/15B01J2523/69B01J2523/56C07C47/22C07C57/04C07C51/00
Inventor 上田涉万谷康弘奥村公人川口彻
Owner NIPPON KAYAKU CO LTD
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