Process for preparing acrylic aldehyde by using selective glycerol dehydration and preparation method of catalyst thereof

A catalyst and selective technology, applied in the preparation of organic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc., to achieve the effects of less environmental pollution, low production cost, and avoidance of energy consumption

Inactive Publication Date: 2010-11-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The propane oxidation method has aroused people's research interest due to the cheap raw materials, but propane itself is a saturated small molecular alkane with stable properties, and its synthesis into acrolein needs to overcome thermodynamic limitations. How this method can improve the yield of acrolein remains to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh a certain amount of silicotungstic acid and activated alumina respectively, so that the mass ratio of the two is 1:4, that is, the loading of active components in the catalyst is 20%. Dissolve silicotungstic acid in distilled water so that the volume of its aqueous solution is equal to the pore volume of activated alumina. Immerse activated alumina in aqueous solution of silicotungstic acid for 4 hours, then dry the catalyst at 120°C for 10 hours, stir once every 15 minutes during the impregnation and drying process, and cool the dried catalyst to room temperature in a desiccator . The cooled catalyst was calcined at 220°C for 4 hours, the calcined catalyst was pressed into tablets, pulverized, and sieved into 20-40 meshes for later use. The prepared catalyst was named silicotungstic acid-activated alumina-20.

[0020] The selective dehydration reaction of glycerol is carried out in a fixed-bed microreactor with 20% glycerin aqueous solution as raw material, and...

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Abstract

The invention discloses a process for preparing acrylic aldehyde by using selective glycerol dehydration and a preparation method of a catalyst thereof. Heteropolyacid/a carrier is disclosed in the expression of the catalyst, wherein the heteropolyacid is one of silicotungstic acid, phosphotungstic acid and phosphomolybdic acid, and the carrier is one of activated aluminium oxide, kieselguhr, activated carbon, rutile type titanium dioxide and kaoline. The catalyst is prepared by using a constant-pore volume dipping method. When the catalyst is used in a fixed-bed miniature reaction device, the transformation rate of glycerol is 13.5%-80.6%, and the selectivity of the acrylic aldehyde is 49.0%-90.5%. When used for carrying out the process for preparing acrylic aldehyde by using glycerol dehydration, the catalyst has the advantages of high catalyst activity, high reaction speed, high selectivity for the acrylic aldehyde and the like, and the main byproduct is hydroxyl acetone.

Description

technical field [0001] The invention relates to a process for preparing acrolein by selective dehydration of glycerin and a preparation method of a catalyst thereof. Background technique [0002] Acrolein is an important organic chemical product and an important intermediate for the preparation of fine chemical products. It is widely used in the feed industry, papermaking and water treatment, oil exploration and medical industries. The specific application of acrolein includes D, L-methionine required for the production of animal feed additives, an effective fungicide for industrial circulating cooling water, and an effective fungicide for oil field injection water in the petroleum industry. Acrolein is the simplest unsaturated aldehyde, which can be converted into a variety of high value-added downstream products due to its two reactive functional groups. [0003] The industrial production process of acrolein mainly includes condensation method and oxidation method. The f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J27/188B01J23/30C07C47/22C07C45/52
Inventor 沈灵沁殷恒波冯永海卢章准陈维广张运生
Owner JIANGSU UNIV
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