A New Technique for Continuous Synthesis of Pseudoionone from Citral
The industrial synthesis of pseudoionone is mostly intermittent with low selectivity.The effects of oscillation frequency,residence time,reaction temperature,sodium hydroxide dosage and molar ratio of acetone to citral on the synthesis of pseudoionone were investigated in an oscillating continuous flow reactor.The results showed that the conversion rate of pseudoionone reached 98％and the selectivity reached 94％when the oscillation frequency was 300 r/min,the residence time was 1.5 h,the reaction temperature was 35 ℃,the amount of sodium hydroxide(mass fraction)was 1％,and the molar ratio of acetone to citral was 14︰1.The reactor can realize the continuous reaction of pseudoionone.
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