Polymer-bound tripe amino-acid schiff base metal copper complexes catalyst and synthesis method thereof
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A technology of amino acids and Schiff bases, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc.
Inactive Publication Date: 2009-06-10
NORTHWEST NORMAL UNIVERSITY
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The present invention aims to provide a polymer-supported ternary amino acid Schiff base metal copper complex catalyst and its synthesis method
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Embodiment 1
[0019] ①Add 3g of chloromethyl polystyrene to 100ml of acetone, heat and swell at 60°C for 12 hours, then add 1.4g of 2,4-dihydroxybenzaldehyde, 1.38g of anhydrous potassium carbonate, 0.16g of potassium iodide, and 0.2ml of PEG-400 and 50ml of acetone solvent, and the above reactants were heated to 60 ° C, under the protection of nitrogen, stirred and reacted for 12 hours, filtered the solid product, and washed 5 times with 20ml of acetone respectively to obtain PS-sal, which was set aside;
[0020] ② Dissolve 0.89g of alanine in a mixed solution of methanol and water, the volume ratio of methanol to water is 1:1, add 0.4g of sodium hydroxide and stir to dissolve the sodium hydroxide, then add the 4.4 gPS-sal, and heated the reactant to 55°C-60°C, reacted for 12 hours under stirring to obtain a light yellow solid suspension, filtered the solid product, and washed several times with methanol and water respectively to obtain PS-sal-ala, ;
[0021] ③Dissolve 1.99g of copper ace...
example 1
[0025] Under normal pressure, when the temperature is 105°C-115°C, the polymer-supported ternary amino acid Schiff base metal copper complex catalyst and ethylbenzene (2mg: 2ml) are added to the reactor, and no additives are added. Under the conditions, molecular oxygen oxidizes ethylbenzene, the conversion rate of ethylbenzene is 20%, the selectivity of product acetophenone is 100%, and no by-product is formed.
example 2
[0027] Under normal pressure, when the temperature is 95°C-105°C, the polymer-supported ternary amino acid Schiff base metal copper complex catalyst and ethylbenzene (2mg: 2ml) are added to the reactor, and no additives are added. Under the conditions, molecular oxygen oxidizes ethylbenzene, the conversion rate of ethylbenzene is 12%, and the selectivity of product acetophenone is 70%.
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Abstract
The invention relates to a macromolecular supported ternary amino acid Schiff base metallic copper complex catalyst formed by coordination of a macromolecular supported amino acid Schiff base metallic complex and micromolecular ligand. By utilization of the catalyst for catalytic oxidation of ethyl benzene and isopropyl benzene under normal pressure and at a temperature of between 105 and 115 DEG C, the conversion rate of the ethyl benzene is 20 percent, the selectivity of an acetophenone product is 100 percent, and no byproducts are generated; and although the conversation rate of the isopropyl benzene is 25 percent, the selectivity of a product, namely 2-phenyl-2-propyl alcohol (PP) is 100 percent. The catalyst has high activity and selectivity, and simultaneously has the following advantages in an oxidation system: firstly, the catalyst can be separated from a reactant and products through filtration; secondly, an oxidant, namely oxygen, does not pollute the environment; and thirdly, the system does not use any additive.
Description
technical field [0001] The invention relates to a polymer-loaded ternary amino acid Schiff base metal copper complex catalyst and a synthesis method thereof. Background technique [0002] Since the 1970s, a lot of research has been done on the catalytic oxidation of hydrocarbons at home and abroad. Often with TBHP, NaOCl, H 2 o 2 , PhIO, NaIO 4 As oxidants, such oxidants have the advantages of strong oxidizing ability and easy operation, but they corrode the reactor more seriously and pollute the environment more, thus limiting their application range. The use of molecular oxygen as an oxygen source has the characteristics of easy availability of raw materials, high oxidation efficiency, and environmental friendliness, but the oxidation ability of molecular oxygen is weak, so a catalyst with high activity and high selectivity is required to realize catalytic oxidation. So far, no suitable reaction system has been found to achieve satisfactory results in the conversion an...
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