关键词: 陶瓷膜 ,  ,  , 微滤 ,  ,  ,  , 对氨基苯酚 ,  ,  ,  , 催化剂微粒

Abstract: Clarification of p-aminophenol feed containing Raney nickel catalyst by micro-filtration (MF) of ceramic membrane has been investigated. The experiments in the lab confirmed filtration the p-aminophenol feed by the ceramic membrane with pore size of 0.2 μm. The component of the cake and fouled membrane in pilot tests were analyzed and found that the pollutants were mainly Raney nickel catalyst. In the industrial application, an effective cleaning method to recover the membrane flux was suggested as follows: firstly washing with circulate solution of alcohol-water for 10 minutes; then rinsing the rig with 1vol% NaOH solution for 20 minutes; and 3% nitric acid solution for 60 minutes; finally industrial soft water for 60 minutes. The above cleaning operations were all performed at 100 ℃. The average permeate flux of a long running in the plant was 400 L/(m²·h). The nickel content in the permeate liquid could not be determined by an atomic absorption spectrometry. So that in industrial conditions the Microfiltration of PAP suspension by a ceramic membrane is a reliable and efficient technology of the clarification.

Key words: Ceramic membrane ,  ,  Microfiltration  ,   , p-Aminophenol  , Catalytic particles