Development and Application of Filter Aid for Zeolite Slurry

The measurement of filtration rate of zeolite slurry was established with a Buchner funnel.The processes of the solid-liquid separation of the zeolite slurry,the exchange and washing of the filter cake were respectively studied. Four kinds of the filter aids corresponding to the zeolite slurries were developed. Laboratory and scale-up experiment's results showed that the filtering rate of the zeolite slurries can be effectively improved by adding a small amount of the filter aids into the zeolite slurries in advance.The problems of poor filtering rate which had puzzled the factories for more than ten years were satisfactorily solved by means of filter aid. Finally the separation,the exchange and the washing processes on the vacuum belt filter for the zeolite slurry have been widely applied so as to replace the frame filter in three domestic major catalyst factories.