GAS-ABSORBING IONIC LIQUIDS CONTAINING A FLUORIC GROUP

摘要

PURPOSE: A vapor absorbing agent using ionic liquid containing fluorine is provided to stably absorb vapor without contaimination. CONSTITUTION: A vapor absorbing agent for purifying gas is an ionic liquid containing a cation of perfluorinated dialkyl imidazolium and 1,1,1-trifluoroacetate(CF3COO-). The absorbing agent is able to absorb carbon dioxide(CO_2) or sulfur dioxide(SO_2). The perfluorinated alkyl group is tetrafluoroethyl (-CF2CHF2), chlorotrifluoroethyl(-CClFCHF2) or hexafluoropropyl(-CF2CHFCF3). The ionic liquid is 1,butyl-3-hexafluoropropyl imidazolnium trofluoroacetate; 1-ethyl-3-hexafluoropropy imidzolnium trifluoroacetate(EhFpIM][FAc]), or 1-butyl-3-tetrafluoroethyl imidazolnium trifluoroacetate(BtFeIM][FAc]).