摘要
采用化学清洗、扫描电子显微镜(SEM)、能量-色散光谱(EDS)分析了环己酮氨肟化工艺中无机陶瓷膜污染物组成,进行了化学反冲洗实验。结果表明,造成无机陶瓷膜堵的主要原因是TS-1催化剂溶解流失,而催化剂主要成分中的Ti、Si化合物停留在膜管支撑体表面和膜表面。提出了防止膜污染的方法,实际生产表明,对无机陶瓷膜进行酸、碱反冲洗,可将膜通量从污染时的只有新膜通量的20%提升至95%,延长了膜管的使用寿命。
Analyzed the pollution constitution of inorganic ceramic membrane in cyclohexanone ammoximation process using chemical cleaning, scanning electron microscope(SEM), energy dispersive spectroscopy(EDS), then carried out chemical backwash experiment.Results showed that the main cause of plugging in inorganic ceramic membrane was dissolving and turnover of TS-1 catalyst, and the main components of the catalysts such as Ti and Si compounds were staying in the support body surface of membrane tube and surface of membrane, presented methods to prevent membrane pollution. Practical production showed that the ratio of membrane flux to new membrane flux could improve from 20% to 95% in pollution since adopting methods such as acid and alkali backwash for inorganic ceramic membrane, which could prolong the service life of the membrane tube.
出处
《化工生产与技术》
CAS
2015年第2期42-43,52,共3页
Chemical Production and Technology
关键词
无机陶瓷膜
膜污染
环己酮氨肟化
反冲洗
inorganic ceramic membrane
membrane pollution
cyclohexanone ammoximation
backwash
