To remove a halogen and/or a peroxide-containing compd. from a gas or a liquid by performing filtering treatment at a specific temp. using a filter obtained from a material composed of a polyarylene thioether.
The material of a filter is composed of a polyarylene thioether and used in a form of a powder, a fiber, a film or a molded article. 1,4- Polyphenylene sulfide with an average mol.wt. of 4000-200000 is especially pref. Filtering treatment is performed at a temp. of -50-+250°C which is lower than the softening point of this polymer. Halogen is removed by a halogen addition reaction to the respective aromatic rings of the polymer and a peroxide compd. is removed by the conversion of respective sulfide groups to a sulfone stage. The filter using this material is used in the purification of the exhaust duct of a chemical manufacturing plant or a semiconductor or metal manufacturing plant.
ANDOREEASU SHIYURAIHIAA
GEORUKU FURANKU
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