摘要
为回收磷酸羟胺法生产丁酮肟工艺中加氢催化剂,以不锈钢膜和陶瓷膜分别对钯炭催化剂体系进行错流过滤实验。结果表明,采用不锈钢膜,通量衰减严重,并且在完成10个反冲洗周期后,通量只有原始通量的30%,且不可再生。采用50 nm的陶瓷膜回收催化剂效果比较好,通量稳定性好,更加适用于已破损钯炭催化剂的回收。在0.4 MPa压差下,较为经济的错流速度约为2 m/s,运行8 h后通量约为110 L/(m^(2)·h),约为初始通量的93%。反冲洗对于陶瓷膜通量的恢复作用极其微小,可以通过短时间提高错流速度冲刷膜表面滤饼达到通量恢复的目的。
Cross flow filtration of palladium carbon catalyst system with stainless steel membrane and ceramic membrane for recovery of hydrogenation catalyst in butanone oxime production by hydroxylamine phosphate method.The results showed that the flux attenuation was serious when the palladium-carbon catalyst was recovered by stainless steel membrane filtration.After 10 backwash cycles,the flux was only 30%of the original flux,and it was non-renewable.The ceramic membrane with 50 nm is more suitable for the recovery of damaged palladium carbon catalyst.Under the pressure difference of 0.4 MPa,the relatively economical cross-flow velocity was about 2 m/s,and the flux was about 110 L/(m^(2)·h)after 8 h operation,which was about 93%of the initial flux.The effect of backwashing on the flux recovery of ceramic membrane is very small,and the purpose of flux recovery can be achieved by washing the filter cake on the surface of the membrane by increasing the cross-flow velocity in a short time.
作者
周黎旸
段仲刚
周强
ZHOU Liyang;DUAN Zhonggang;ZHOU Qiang(Juhua GroupLimited,Quzhou,Zhejiang 324004)
出处
《化工生产与技术》
CAS
2021年第4期1-4,I0002,共5页
Chemical Production and Technology
关键词
钯碳催化剂
不锈钢膜
陶瓷膜
回收
Palladium-Carbon Catalyst
stainless steel membrane
ceramic membrane,recovery
