A kind of method for catalyzing synthesis of furfural ethylene glycol acetal by aluminum ammonium phosphotungstate composite salt

A furfural ethylene glycol acetal, aluminum phosphotungstate technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc. The problem of low activity and selectivity is to avoid the increase of by-products, to achieve excellent catalytic performance, and to promote efficient synthesis.

Active Publication Date: 2020-08-04
SHAOYANG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned single-type heteropolyacid salt catalysts still have defects such as low activity and selectivity, or poor reusability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Catalyst preparation: Weigh 0.25 mmol of ammonium carbonate, 0.7 mmol of aluminum nitrate and 1 mmol of phosphotungstic acid and dissolve them in 20 ml of deionized water; after dissolving, slowly add the aluminum nitrate solution dropwise to In the phosphotungstic acid solution, react for 0.5 hours, then slowly add ammonium carbonate solution dropwise, and gradually form a white precipitate; after the dropwise addition, continue to stir and react for 0.5 hours, let stand and age for 1 hour, the precipitate is separated by filtration, dried, The molecular formula can be obtained as (NH 4 ) 0.5 Al 0.7 h 0.4 PW 12 o 40 Aluminum ammonium phosphotungstate compound salt.

Embodiment 2

[0024] The preparation of catalyst: preparation process is the same as embodiment 1, only the add-on of ammonium carbonate is changed into 0.2 mmol, the add-on of aluminum nitrate is changed into 0.8 mmol, molecular formula can be obtained as (NH 4 ) 0.4 Al 0.8 h 0.2 PW 12 o 40 Aluminum ammonium phosphotungstate compound salt.

Embodiment 3

[0026] The preparation of catalyst: preparation process is the same as embodiment 1, only the add-on of ammonium carbonate is changed into 0.3 mmol, the add-on of aluminum nitrate is changed into 0.6 mmol, molecular formula can be obtained as (NH 4 ) 0.6 Al 0.6 h 0.6 PW 12 o 40 Aluminum ammonium phosphotungstate compound salt.

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Abstract

The invention relates to a method for catalytic synthesis of furfural ethylene glycol acetal from an aluminum phosphotungstate and ammonium phosphotungstate composite salt. The aluminum phosphotungstate and ammonium phosphotungstate composite salt is taken as a catalyst, furfural ethylene glycol acetal is generated from furfural and ethylene glycol through a condensation reaction, and the condensed structural formula of the aluminum phosphotungstate and ammonium phosphotungstate composite salt is (NH4)xAlyH(3-x-3y)PW12O40, wherein x=0.4-0.6, and y=0.6-0.8. The aluminum phosphotungstate and ammonium phosphotungstate composite salt as the catalyst has larger specific surface area, higher surface acid density and proper acid strength, so that the catalyst has excellent catalytic performance,and product yield is high. Besides, raw materials of the catalyst are easily available, the preparation process is simple, the catalyst and the product are easy to separate, and the catalyst is recyclable.

Description

technical field [0001] The invention relates to a synthesis method of furfural ethylene glycol acetal, in particular to a method for catalyzing the synthesis of furfural ethylene glycol acetal by aluminum ammonium phosphotungstate compound salt, which belongs to the field of organic synthesis. Background technique [0002] Furfural glycol acetal is an important chemical intermediate raw material, and is widely used in food flavors and spices. In addition, it is also a new type of low-toxicity plant growth regulator, which can promote the root growth of plants and enhance the drought and salt resistance of plants. [0003] In the traditional production process of furfural glycol acetal, liquid acids such as concentrated sulfuric acid, hydrochloric acid and phosphoric acid are mainly used as catalysts. The catalyst is cheap and has high catalytic activity. However, there are many by-products in the reaction, and it is difficult to separate and purify the products. In additio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/18B01J27/188B01J27/24C07D407/04B01J35/10
CPCB01J27/188B01J27/24B01J35/1004C07D407/04Y02P20/584
Inventor 戴友志张超
Owner SHAOYANG UNIV
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