Apparatus for electrostatic filtration of N2O4 for removal of solid and vapor contaminants

摘要

An electrostatic filtration apparatus is used to significantly reduce contaminants in N2O4 vapor and liquid at ambient temperatures. The apparatus uses an electret vapor filter having therein a stack of layers of electret material through which the N2O4 must pass. A flow blocking filter is added to the electret liquid filter to insure a sufficient time for removal of contaminants by said electret material. The filter is constructed of chemically inert materials to prevent additional contaminants.