固定流化床中Fe-ZSM-5分子筛上N_2O一步氧化苯制苯酚再生工艺条件研究  

AN INVESTIGATION OF THE REGENERATION CONDITIONS OF BENZENE TO PHENOL BY ONE-STEP OXIDATION WITH NITROUS OXIDE OVER Fe-ZSM-5 ZEOLITE IN FIXED FLUIDIZED BED

作　　者：邱东[1] 李建伟[1] 米冠杰[1] 陈标华[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《石油炼制与化工》2010年第10期17-21,共5页Petroleum Processing and Petrochemicals

基　　金：国家杰出青年科学基金项目(20625621)

摘　　要：采用等温固定流化床反应器，对N2O一步氧化苯制苯酚所用Fe—ZSM-5分子筛催化剂的再生工艺条件进行了夹验研究。在对固定流化床反应器性能研究的基础上，以单因素实验法考察了再生温度（350～550℃）、再生气中N2O体积分数（6．25％～25．00％）和再生操作气速（0．040～0．072m／s）等对再生过程的影响；并采用L9（3^4）正交实验设计，综合考察了再生温度、再生气中N2O体积分数和再生操作气速对再生过程的影响。以苯酚收率最大为目标最终确定的相对适宜再生工艺条件为：再生温度440℃、再生气中N2O体积分数12．50％、再生操作气速0．059m／s，在此条件下，苯酚的收率可达64．24％。The influence of regeneration conditions on the performance of Fe-ZSM-5 zeolite catalyst for benzene to phenol with nitrous oxide was studied systematically by a fixed fluidized bed （FFB） reactot. On the basis of FFB performance investigation, the effects of regeneration temperature （350-550 ℃ ）, volume percentage of N2O in regeneration gas （6.25%-25.00%） and regeneration gas velocity （0.040-0.072 m/s） on the catalytic performance of regenerated catalyst were studied by single-factor test method. Based on the above results, orthogonal design tests, L9 （ 3^4 ）, were carried out to determine the optimum conditions for obtaining maximum yield of phenol. Results showed that using catalyst regenerated under the optimum conditions of a regeneration temperature of 440 ℃, a volume percentage of N2O in regeneration gas of 12.50% and a regeneration gas velocity of 0.059 m/s, the yield of phenol could reach 64.24%.

关 键 词：苯N2O 苯酚 Fe-ZSM-5分子筛 固定流化床 再生 

分 类 号：TQ243.12[化学工程—有机化工]