连续串联釜式反应器中苯酚羟化制苯二酚的催化剂活性分布

在连续串联搅拌釜反应器(m-CSTR)中对铁复合氧化物催化剂作用下苯酚过氧化氢羟化制苯二酚体系中催化剂活性及其分布进行实验研究，结果表明：在催化剂使用过程中，催化剂活性衰减较快，得到催化剂活性与时间的关系式。为使m-CSTR中催化反应稳定进行，采用部分回用的方式进行操作，利用活性方程对m-CSTR中催化剂活性分布进行了计算。结果表明：随着回用比和回用次数的增加，催化剂的平均活性下降，回用比小于0．6时，催化剂的活性为开始活性的85％，可保持在较高的水平，产物组成也保持原有水平。串联釜级数对催化剂的活性及其分布、产物组成影响较小。

Distribution of Catalyst Activity of Hydroxylation of Phenal in Continuous Stirred Tank Reactor

The relationship of activity of iron complex oxide catalyst and time in continuous stirred tank reactor (m-CSTR) was set up with the help of experimental data of the hydroxylation of phenol and hydrogen peroxide. The experimental results show that the activity of catalyst attenuates swiftly. In order to maintain stable industrial operations continuously, part of catalyst from m-CSTR was recycled and some fresh catalyst was complemented. According to the relationship, the activity and its distribution of catalyst in m-CSTR were calculated. The results show that the average activity is as 0.85 or more of the initial one when the recycled ratio is lower than 0.6. The ratio of products is almost mintained at the original level. The effect of series number of m-CSTR on the activity of catalyst is faintish.