Verfahren zur Trennung von Kohlendioxyd aus einer Mischung saeurefreier Gase

摘要

1296889 Separating CO 2 from non-acid gases MINE SAFETY APPLIANCES CO 22 July 1970 [12 Aug 1969] 35535/70 Heading B1L Carbon dioxide is separated from mixtures with non-acid gases such as air by sorption on a weakly basin ion exchange resin followed by desorption with steam under condtions such that the steam condenses at the inlet end of the resin bed and a front of condensing steam then progressively passes through the bed displacing the carbon dioxide. Sorption is suitably conducted at 40-90‹F and at a relative humidity of 75-90%. The preferred ion exchanger is a polystyrene-divinylbenzene copolymer containing polyamino functional groups, each of which comprises at least one secondary amino nitrogen atom. In Fig. 1 (not shown), an automatically controlled single bed sorption-regeneration system is illustrated.