Polyarylene ethers are used in the prodn. of respiratory filters and to remove nitrogen dioxide from gas mixtures

摘要

A filter material contg. polyarylene ethers is used to remove NO2. Also claimed is a filter material contg., in addition, an oxidising agent with a redox potential of at least 0.96V. Also claimed are filters contg. such filter materials and the process of producing gases free of NO and NO2 by bringing the gases in contact with such filter materials.