| 摘要 |
<p>PURPOSE: To efficiently remove solvents of a wide range of chemical structures by bringing an absorption liquid selected from the group consisting of alkylene glycol ethers for absorbing the solvents from a gas stream into contact with the gas stream. CONSTITUTION: The alkylene glycol di-n-butyl ethers expressed by formula I (wherein R is H or CH3 , (x) is 1 to 8) are brought, as the absorption liquid, into contact tightly with the gaseous mixture to purify the gaseous mixture in an absorption region (absorption column). Namely, the removal of the solvents (polar or nonpolar arom. or aliphat. compds. existing in the gas stream is executed by the absorption, by which the purified gas stream is obtd. Further, the removal (desorption) of the solvents absorbed from the absorption liquid in order to recover the solvents is also recommended. Even the solvents of a wide range of the chemical structures, more particularly the solvents which exhibit efficient absorptivity to the solvent mixture and are physically bonded may be easily removed and recovered again by this method.</p> |
