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Catalyst used in catalytic oxidation of glyoxal for preparing glyoxylic acid and preparation method of catalyst

A catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of high price and low glyoxylic acid selectivity, and achieve low price, high selectivity, secondary The effect of less product

Inactive Publication Date: 2012-07-11
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems that the existing noble metal catalysts are expensive and have low selectivity to glyoxylic acid, and provide a catalyst for preparing glyoxylic acid by catalyzing the oxidation of glyoxal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 0.1010 g of ammonium metavanadate and 0.2176 g of oxalic acid to prepare 100 ml of ammonium metavanadate-oxalic acid solution; weigh 10 ml of ammonium metavanadate-oxalic acid solution and 1 gram of SBA-15 molecular sieve respectively, and use equal volume impregnation Preparation method, after drying at room temperature, drying at 100°C for 5h, and finally roasting at 550°C for 6h, after cooling, catalyst V was prepared 2 o 5 / SBA-15,V 2 o 5 The load is 1%.

Embodiment 2

[0017] Weigh 0.3092 g of ammonium metavanadate and 0.6661 g of oxalic acid to prepare 100 ml of ammonium metavanadate-oxalic acid solution; weigh 10 ml of ammonium metavanadate-oxalic acid solution and 1 gram of SBA-15 molecular sieve respectively, and use equal volume impregnation Preparation method, after drying at room temperature, drying at 100°C for 5h, and finally roasting at 550°C for 6h, after cooling, catalyst V was prepared 2 o 5 / SBA-15,V 2 o 5 The load is 3%.

Embodiment 3

[0019] Weigh 0.5263 g of ammonium metavanadate and 1.1336 g of oxalic acid to prepare 100 ml of ammonium metavanadate-oxalic acid solution; weigh 10 ml of ammonium metavanadate-oxalic acid solution and 1 g of SBA-15 molecular sieve respectively, and use equal volume impregnation Preparation method, after drying at room temperature, drying at 100°C for 5h, and finally roasting at 550°C for 6h, after cooling, catalyst V was prepared 2 o 5 / SBA-15,V 2 o 5 The load is 5%.

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Abstract

The invention provides a catalyst used in catalytic oxidation of glyoxal for preparing glyoxylic acid. The catalyst is V2O5 / SBA-15, wherein SBA-15 is used as a carrier to load V2O5. According to the preparation method, the SBA-15 is used as the carrier, oxalic acid solution of ammonium metavanadate is used as impregnation precursor, and the catalyst is prepared by using an equivalent-volume impregnation method. Compared with the noble metal catalyst, the V2O5 / SBA-15 provided by the invention is low in price, the glyoxylic acid can be obtained from the glyoxal under the action of the V2O5 / SBA-15 catalyst without maintaining a certain pH value of a reaction system; only a small amount of oxalic acid is detected from a product; and the catalyst has high glyoxylic acid selectivity and less byproducts.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst for catalyzing the oxidation of glyoxal to prepare glyoxylic acid and a preparation method thereof. Background technique [0002] Glyoxylic acid (OHC-COOH), also known as formaldehyde formic acid or diglycolic acid, is the simplest aldehyde acid, which has the properties of both aldehyde and carboxylic acid, and its chemical properties are quite active. It can undergo condensation reaction with various compounds, so it is widely used in medicine, pesticide, fragrance, papermaking, leather, dyestuff and other industries. With the development of the downstream product market of glyoxylic acid, it has become a fine chemical product with good development prospects, and has been widely used at home and abroad. [0003] At present, the industrial production of glyoxylic acid mainly includes glyoxal nitric acid oxidation method, oxalic acid electrolytic reduction method and maleic a...

Claims

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Application Information

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IPC IPC(8): B01J29/03C07C59/147C07C51/235
Inventor 牛宇岚翟丽军辛先荣
Owner TAIYUAN INST OF TECH
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