强酸性阳离子树脂催化丙烯醛水合反应的研究

Study on the Acrolein Hydration Catalyzed by Strong Acidic Ion-Exchange Resin

以强酸性阳离子树脂为催化剂,考察了在间歇式和固定床中两种不同方式下的丙烯醛水合反应情况,并研究了此类树脂催化丙烯醛水合工艺条件。结果表明,D072型强酸性树脂因其酸性强,催化丙烯醛水合反应时存在着反应温度低、转化率高等特点,但产物选择性较低;在所选两种不同反应方式中,间歇式反应需时较长,且容易控制丙烯醛分子在催化剂表面的停留时间,丙烯醛的转化率及产物3-羟基丙醛的选择性最高可达到60.00%和63.01%;在连续反应中,丙烯醛转化率仅为45.57%,产物选择性为65.24%,产率低于间歇反应。连续反应中因省略了催化剂的分离过程,并可以有效地减少丙烯醛的挥发,因此更加有利于工业化生产。

The hydration of acrolein was studied using 13072 strong acidic ion-exchange resin as catalyst in both modes of the continuous fixed bed reactor and the batch vessel, and the effects of reaction conditions were observed. Using the 13072 resin as catalyst, the reaction temperature was low and the conversion of acrolein was high due to the strong acidivity of catalyst, but the selectivity to 3-hydroxypropaldehyde was low. In the batch reaction, the required reaction time was long, but the residual time could be well control, and the selectivity to 3- hydroxypropaldehyde could be up to 60.00% with the acrolein conversion of 63.01%. In the continuous reaction, the yield was lower than that in the batch reaction;when the conversion was 45.57%, the selectivity was 65.24 %. The continuous reaction can omit the separation of catalyst from the product and reduce the volatilization loss of acrolein, and it will be more favorable to industrial production.