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Preparation method of solid catalyst for Knoevenagel reaction

A solid catalyst and catalyst technology, which is applied in the preparation of organic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of difficult catalyst recovery and high cost, and achieve low production costs, reduced preparation costs, and catalytic activity. high effect

Inactive Publication Date: 2014-10-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is aimed at the defects such as difficulty in catalyst recovery and high cost in the current catalyzed Knoevenagel reaction

Method used

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  • Preparation method of solid catalyst for Knoevenagel reaction
  • Preparation method of solid catalyst for Knoevenagel reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 0.1g of graphene oxide and put it into 10g of ammonia water, the concentration of ammonia water is 28%, stir vigorously at 20°C for 6h, perform suction filtration after the reaction, wash with deionized water until the filtrate is neutral, and then filter the cake Dry the required catalyst in a vacuum oven at 40°C (10Pa) for 6h, which is designated as Cat1.

Embodiment 2

[0021] Take 0.1g of graphene oxide and put it into 20g of ammonia water, the concentration of ammonia water is 28%, stir vigorously at 20°C for 6h, perform suction filtration after the reaction, wash with deionized water until the filtrate is neutral, and then filter the cake Dry the required catalyst in a vacuum oven at 40°C (10Pa) for 6h, and record it as Cat2.

Embodiment 3

[0023] Take 0.1g of graphene oxide and put it into 15g of ammonia water, the concentration of ammonia water is 28%, stir vigorously at 10°C for 6h, carry out suction filtration after the reaction, wash with deionized water until the filtrate is neutral, then remove the filter cake Dry the required catalyst in a vacuum oven at 40°C (10Pa) for 6h, and record it as Cat3.

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Abstract

The invention relates to a preparation method of a solid catalyst for Knoevenagel reaction. The catalyst adopts graphene oxide and ammonia water as raw materials, and ammonium ions can be effectively immobilized on the surface of the graphene oxide through one-step reaction at room temperature, so that the solid catalyst for Knoevenagel reaction is obtained. The method is simple to operate, the obtained solid catalyst can be recycled through simple treatment after reaction, is long in service life, and has no pollution, and the production cost can be reduced greatly; besides, the solid catalyst has good catalytic effect when being used for Knoevenagel reaction.

Description

technical field [0001] The invention relates to the field of preparation of solid catalysts, in particular to a method for preparing solid catalysts for Knoevenagel reaction. Background technique [0002] The Knoevenagel condensation reaction is an important "C=C" formation reaction, which is widely used in the preparation of α,β-unsaturated carbonyl compounds, such as intermediates of spices and drugs. There are many applications in the fields of industry, agriculture, and biomedicine. Catalysts used in such reactions can generally be classified into homogeneous and heterogeneous catalysts. Traditional homogeneous catalysts are mainly organic bases, such as aliphatic amines, aromatic amines, etc.; heterogeneous catalysts are mainly Lewis bases (such as molecular sieves) and solid basic substances. Homogeneous catalysis and although the catalytic efficiency is very high, this kind of catalyst cannot be recycled and reused, which is not only economically unfeasible, but als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C253/30C07C255/34
CPCY02P20/584
Inventor 薛冰许莽柳娜李永昕许杰
Owner CHANGZHOU UNIV
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