PURPOSE: To efficiently perform the filter of gas for a long time by treating gas to be treated by means of a granular adsorbent and thereafter treating it by ion exchange fiber.
CONSTITUTION: Gas contg. an unavailable material such as i.e. NH3 or an available material is treated by activated carbon, impregnated carbon which is impregnated with chemicals capable of adsorbing aidic gas and alkaline gas and a granular adsorbent such as silica gel and alumina gel and thereafter treated by ion exchange fiber such as cation exchange fiber, anion exchange fiber and chelate exchange fiber respectively having a cation exchange group, an anion exchange group and a chelate group. Air-permeable resistance is reduced and simultaneously high-degree filter of gas is efficiently performed for a long time by performing two treatments in such a way.
| JP2004154209 | MASK |
| JPH05161812 | FILTER MEMBER |
YOSHIOKA TOSHIO
YOSHIKAWA SEIICHI
