胶体铜催化丙烯腈水合制丙烯酰胺的反应动力学

Kinetics for Acrylonitrile Hydration to Produce Acrylamide in the Presence of Colloidal Copper Catalyst

研究了以胶体铜为催化剂，丙烯腈水合制丙烯酰胺反应动力学。实验表明，吸附、表面反应、解析，在反应过程中占有重要地位，属于多相催化反应动力学。若以吸附在铜颗粒表面的丙烯腈与液相中的水之间的反应为控制步骤，导出的化学反应动力学方程与实验结果较好的一致，在实验温度４０～９０℃范围内，求得活化能Ｅａ＝１３．１４ｋＪｍｏｌ－１。

The kinetics of acrylonitrile hydration to produce acrylamide was studied under the colloidal copper catalyst. The experimental result showed that absorption, surface reaction and deabsorption could be important in the hydrated reaction, and the reaction belongs to heterogeneous catalysis kinetics. The kinetics equation of the reaction derived from Langmuir Rideal mechanism is almost identical to the experimental result if the reaction between acrylonitrile which was absorpted on the surface of colloidal particles and aqueous in liquidoid would be regarded as control step in hydration. The activation energy is E a =13.14 kJ·mol -1 at the temperature ranged from 40 to 90℃.