Preparation method of vinyl ester carboxylic acid
A technology of vinyl carboxylate and vinyl acetate, applied in the field of chemistry, can solve the problems of difficult recovery, high price, causing pollution, etc., and achieve the effects of simple preparation method, low equipment corrosion, and high catalytic activity
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Embodiment 1
[0029] Weigh 25g of activated carbon and place it in a flask, add 30% HNO 3 The solution was heated and stirred in a water bath at 60°C for 4 hours, the activated carbon in the solution was filtered out, the activated carbon was repeatedly washed with distilled water until the filtrate was neutral, and dried for later use. Weigh 5g of pretreated activated carbon and place it in a flask, and add 50g of distilled water; weigh 0.25g of PdCl 2 , dissolved in concentrated HCl and poured into a flask, stirred and impregnated in a water bath at 80°C for 6h, filtered and washed until the filtrate was neutral, and dried to a constant weight to obtain 1 # Loaded PdCl 2 / C solid catalyst.
Embodiment 2
[0031] Weigh 25g of activated carbon and place it in a flask, add 30% HNO 3 The solution was heated and stirred in a water bath at 60°C for 4 hours, the activated carbon in the solution was filtered out, the activated carbon was repeatedly washed with distilled water until the filtrate was neutral, and dried for later use. Weigh 5g of pretreated activated carbon and place it in a flask, and add 50g of distilled water; weigh 0.25g of PdCl 2 , dissolved in concentrated HCl, poured into a flask, added 0.2g NaCl, stirred and impregnated in a water bath at 80°C for 6h, filtered and washed until the filtrate was neutral, dried the solid to constant weight, and obtained 2 # Loaded PdCl 2 -NaCl / C solid catalyst.
Embodiment 3
[0033] Weigh 25g of activated carbon and place it in a flask, add 30% HNO 3 The solution was heated and stirred in a water bath at 60°C for 4 hours, the activated carbon in the solution was filtered out, the activated carbon was repeatedly washed with distilled water until the filtrate was neutral, and dried for later use. Weigh 5g of pretreated activated carbon and place it in a flask, and add 50g of distilled water; weigh 0.25g of PdCl 2 , dissolved in concentrated HCl and poured into a flask, added 0.2g KCl, stirred and impregnated in a water bath at 80°C for 6h, filtered and washed until the filtrate was neutral, dried the solid to constant weight, and obtained 3 # Loaded PdCl 2 - KCl / C solid catalyst.
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