초록 ▼

An adsorbent for separating gases, which comprises a binder and a crystalline low-silica faujasite type zeolite with a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 1.9 to 2.1, wherein the average pore diameter of the macropores is equal to or larger than the mean free path of an adsorbable compon

An adsorbent for separating gases, which comprises a binder and a crystalline low-silica faujasite type zeolite with a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 1.9 to 2.1, wherein the average pore diameter of the macropores is equal to or larger than the mean free path of an adsorbable component when desorbing the adsorbable component from the adsorbent, and at least 70% of the total volume of the macropores is occupied by macropores having a diameter equal to or larger than the mean free path of the adsorbable component.

대표청구항 ▼

[ What is claimed is:] [1.] An adsorbent for separating gases, which comprises a binder and a crystalline low-silica faujasite type zeolite with a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 1.9 to 2.1, wherein the average pore diameter of the macropores is equal to or larger than the mean free

[ What is claimed is:] [1.] An adsorbent for separating gases, which comprises a binder and a crystalline low-silica faujasite type zeolite with a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 1.9 to 2.1, wherein the average pore diameter of the macropores is equal to or larger than the mean free path of an adsorbable component when desorbing the adsorbable component from the adsorbent, and at least 70% of the total volume of the macropores is occupied by macropores having a diameter equal to or larger than the mean free path of the adsorbable component. [13.] A process for separating a mixture of nitrogen gas and oxygen gas in air, which comprises contacting air with a packed bed of the adsorbent for separating gases of claim 1, to selectively adsorb nitrogen gas from the air leaving oxygen gas. The process for separating nitrogen gas and oxygen gas in air according to claim 13, wherein nitrogen gas in the air is selectively adsorbed by a pressure swing adsorption method. A process for separating oxygen gas from nitrogen gas in air according to claim 14 comprising the steps of:(1) contacting air with the packed bed of adsorbent and selectively adsorbing nitrogen gas from the air leaving a stream of concentrated oxygen gas from an outlet of the packed bed;(2) regenerating the packed bed by interrupting air contact with the packed bed and reducing pressure inside of the packed bed to desorb adsorbed nitrogen gas and evacuating the thus desorbed nitrogen gas; and(3) repressurizing the regenerated packed bed by repressurizing it with concentrated oxygen gas obtained in step (1). The process for separating nitrogen gas and oxygen gas in air according to claim 15, wherein the adsorption pressure during adsorbing step (1) is within a range of from 760 Torr to 1520 Torr. The process for separating nitrogen gas and oxygen gas in air according to claim 15, wherein the desorption pressure in regeneration step (2) is within a range of from 100 Torr to 400 Torr. The process for separating nitrogen gas and oxygen gas in air according to claim 15, wherein the pressure during repressurizing step (3) is within a range of from 400 Torr to 800 Torr.