초록 ▼

For the separation of gaseous mixtures: (a) passing a feed gas containing components A and B successively through two adsorption beds selected for component A to evolve an adsorption front of component A proximate the outflow end of the first adsorption bed, discharging an A-free product gas from th

For the separation of gaseous mixtures: (a) passing a feed gas containing components A and B successively through two adsorption beds selected for component A to evolve an adsorption front of component A proximate the outflow end of the first adsorption bed, discharging an A-free product gas from the second adsorption bed, then interrupting the passing of the feed gas; (b) lowering the pressure of both adsorption beds in the adsorption direction so that proportions of unadsorbed component A are withdrawn from said first adsorption bed, and said proportions from the first adsorption bed are adsorbed in the second adsorption bed, and withdrawing an A-free gas from the second adsorption bed; (c) at the pressure of step (b), conducting a further gaseous mixture in the adsorption direction through both adsorption beds, the partial pressure of component A in said further gaseous mixture being equal to or higher than in the feed gas, interrupting the feeding of said further gaseous mixture before the breakthrough of component A through the second adsorption bed, and withdrawing an A-free gas from said second adsorption bed; (d) disconnecting both adsorption beds from one another; expanding the first adsorption bed loaded with component A to recover component A; expanding the second adsorption bed, partially loaded with component A countercurrently to the adsorption process and passing a purge gas countercurrently through the expanded second adsorption bed to desorb component A; and (e) reconnecting both adsorption beds and repeating step (a).

대표청구항 ▼

A selective adsorption process for the separation of gaseous mixtures comprising the steps of: (a) passing a feed gas mixture containing components A and B successively at a first pressure through two adsorption beds selective for component A until the evolving adsorption front of component A substa

A selective adsorption process for the separation of gaseous mixtures comprising the steps of: (a) passing a feed gas mixture containing components A and B successively at a first pressure through two adsorption beds selective for component A until the evolving adsorption front of component A substantially reaches the outflow end of the first adsorption bed or has only unsubstantially penetrated into the second adsorption bed, discharging an A-free product gas from the outflow end of the second adsorption bed, then interrupting the feeding of the feed gas mixture to the first adsorption bed; (b) expanding both adsorption beds in the adsorption direction to a lower pressure sufficient so that proportions of unadsorbed component A emerge from said first adsorption bed, and so that said emerged proportions from the first adsorption bed are adsorbed in the second adsorption bed, and withdrawing an A-free gas from the second adsorption bed; (c) at the same pressure as in step (b), conducting a further gaseous mixture in the adsorption direction through both adsorption beds, the partial pressure of component A in said further gaseous mixture being higher than in the feed gas; interrupting the feeding of said further gaseous mixture before the breakthrough of component A through the second adsorption bed, and withdrawing an A-free gas from said second adsorption bed; (d) disconnecting both adsorption beds from one another, and expanding the first adsorption bed loaded substantially completely with component A to recover component A; and at the same time expanding the second adsorption bed, partially loaded with component A, in a countercurrent direction to the adsorption process and passing a purge gas in said countercurrent direction through the expanded second adsorption bed to desorb component A; and (e) reconnecting both adsorption beds with each other and charging same to said first pressure of step (a).