GAS-ABSORBING IONIC LIQUIDS CONTAINING A PHOSPHORUS GROUP

摘要

PURPOSE: A gas absorbent for purifying exhaust gas is provided to absorb acidic gas such as carbon dioxide and sulfur dioxide and to be used as a separate medium of an absorption method for repetitively separating the gas. CONSTITUTION: A gas absorbent for purifying exhaust gas comprises: cation containing nitrogen atom selected from dialkyl imidazolium and dialkyl morpholinium; and anion containing phosphorous atom selected from alkyl phosphate and dialkyl phosphate. The gas absorbent absorbs carbon dioxide(CO2) or sulfur dioxide(SO2). An alkyl group of the dialkyl imidazolium or the dialkyl morpholinium has hydrogen atom or carbon number 1 ~ 4.