A method for preparing acetal (ketone) catalyzed by an acidic magnetic material containing -so3h
A technology of -SO3H and magnetic materials, applied in the preparation of organic compounds, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of high catalyst preparation price, large catalyst usage, post-treatment Complex process and other issues, to achieve the effect of easy industrialized large-scale production, poor miscibility, and high reaction selectivity
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Embodiment 1
[0023] Example 1: 10 mmol of n-butyraldehyde, 10 mmol of 1,3-propanediol and 2.72 g of acidic magnetic material were added to a 25 ml single-necked bottle with a stirring bar and a condenser. The reaction was vigorously stirred at 110° C. for 0.75 h, cooled to room temperature after the reaction, and the catalyst was sucked out with a magnet. The conversion rate of n-butyraldehyde was 97% as detected by the gas chromatography of the reaction liquid, the selectivity of the product n-butyraldehyde 1,3-propanediol acetal was 100%, and the calculated yield was 97%. The catalyst was recycled without treatment.
Embodiment 2
[0024] Example 2: 10mmol of benzaldehyde, 15mmol of 1,3-propanediol and 3.04g of acidic magnetic material were added to a 50ml single-necked bottle with a stirring bar and a condenser. The reaction was vigorously stirred at 110° C. for 1.5 h, cooled to room temperature after the reaction, and the catalyst was sucked out with a magnet. The conversion rate of benzaldehyde was 93% as detected by the gas chromatography of the reaction liquid, the selectivity of the product benzaldehyde 1,3-propanediol acetal was 100%, and the calculated yield was 93%. The catalyst was recycled without treatment.
Embodiment 3
[0025] Example 3: 10mmol of p-nitrobenzaldehyde, 25mmol of ethylene glycol and 2.41g of acidic magnetic material were added to a 50ml single-necked bottle with a stirring bar and a condenser. The reaction was vigorously stirred at 110° C. for 2 h, cooled to room temperature after the reaction, and the catalyst was sucked out with a magnet. Reaction liquid gas chromatography detects that the conversion rate of p-nitrobenzaldehyde is 96%, and the selectivity of product p-nitrobenzaldehyde-ethylene glycol acetal is 100%, and its productive rate is calculated as 96%, and the catalyzer is circulated without treatment use.
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