Verfahren zur Abscheidung von Kohlendioxid aus Verbrennungsabgasen

摘要

PURPOSE:To efficiently remove CO2 from a waste combustion gas by using a combination of an amine compd. X and a relatively small amt. of an amine compd. Y. CONSTITUTION:An amine compd. X has an alcoholic hydroxyl in the molecule and a primary amine joined to a tertiary carbon atom having two unsubstituted alkyls. An amine compd. Y is selected from a group consisting of ethyleneamines other than ethylenediamine, iminobispropylamine, diaminotoluenes, amines expressed by R<1> (CH2NH2)2 (R<1> is a 1-5C methylene chains substitutable by lower alkyls), piperazine compds. expressed by Pip-R<2>-NH2 (R<2> is a 1-4C methylene chains substitutable by lower alkyls) and homopiperazines. The waste combustion gas under atmospheric pressure is brought into contact with an aq. mixed soln. of 100 pts.wt. of the amine compd. X and 1-25 pts.wt. of the amine compd. Y to remove CO2.