Discontinuous Regime Membrane Separation Process

摘要

A process for separating a gaseous or liquid mixture by means of a separating device including a first volume (V1) and a second volume (V2) which are separated by a membrane (MS) which has selective permeability with respect to at least two components of said mixture, the process including the steps consisting in:
a) fill up the first volume of the device with the mixture (Ml) to be separated;b) wait for a period of time (t2−t1) which is in excess of the permeation lag time, but is insufficient to reach a state of equilibrium, during which time a fraction of each component of said mixture passes from the first to the second volume of the device through the membrane;c) evacuate the first and the second volume of the device, as a result of which at least one first (R) and one second cut (P, P1, P2) of the mixture is obtained, having different molar compositions.

主权项

1. A process of separating a gaseous or liquid mixture by means of a separating device including a first volume (V1) and a second volume (V2) which are separated by a membrane (MS) which has selective permeability with respect to at least two components of said mixture, wherein said process comprises the following steps:
a) filling up the first volume of the device with the mixture (MI) to be separated; b) waiting for a period of time (t2−t1) which is in excess of the permeation lag time, but is insufficient to reach a state of equilibrium, during which time a fraction of each component of said mixture passes from the first to the second volume of the device through the membrane; and c) evacuating the first and the second volume of the device, as a result of which at least one first (R) and one second cut (P, P1, P2) of the mixture is obtained, having different molar compositions.