Continuous phenol hydroxylation over ultrafine TS-1 in a side-stream ceramic membrane reactor
Continuous phenol hydroxylation over ultrafine TS-1 in a side-stream ceramic membrane reactor
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在侧流陶瓷膜反应器中对超细 TS-1 进行连续苯酚羟基化
DOI：
10.1007/s11814-013-0004-0
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发表时间：
2013-02
影响因子：
2.7
通讯作者：
Wanqin Jin
中科院分区：
文献类型：
--
作者：
Xiulong Jiang;Fei She;Hong Jiang;Rizhi Chen;Weihong Xing;Wanqin Jin
开发了一种侧流陶瓷膜反应器系统，该系统可以方便地将超细催化剂从反应混合物中原位分离出来，使生产过程保持连续。以超细钛硅分子筛(TS-1)上苯酚连续羟基化合成二苯酚为模型反应，对膜反应器系统的可行性和性能进行了评价。通过单因素实验考察了膜孔径和操作条件(停留时间、温度、催化剂浓度、苯酚/过氧化氢摩尔比)对反应器性能的影响。结果表明，膜的孔径和操作条件对转化率、选择性和过滤阻力有很大影响。连续运行20h，苯酚转化率和二苯二酚选择性分别稳定在11%和95%左右。
A side-stream ceramic membrane reactor system was developed that can facilitate the in situ separation of ultrafine catalysts from the reaction mixture and make the production process continuous. Continuous hydroxylation of phenol to dihydroxybenzene over ultrafine titanium silicalites-1 (TS-1) was taken as a model reaction to evaluate the feasibility and performance of the membrane reactor system. The effects of membrane pore size and operation conditions (residence time, temperature, catalyst concentration, phenol/H2O2molar ratio) on the performance of the reactor system were examined via single factor experiments. We demonstrated that the membrane pore size and operation conditions greatly affect the conversion, selectivity and filtration resistance. The phenol conversion and dihydroxybenzene selectivity remain stable at about 11% and 95% in a 20-h continuous run, respectively.
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