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Tungstophosphoric acid (HPW) catalyst supported on the neural alumina was studied. It was prepared by means of an equilibrium and incipient wetness impregnation technique. Solution of HPW in 50% V/V ethanol-water was used to impregnate Al 2 O 3 at 25°C. It was found that the catalyst containing 30% PW by calcination at 500°C showed a higher catalytic activity in the synthesis of acetals...
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