Abstract: The present invention relates to a process for treating aqueous effluents from the primary circuit of a nuclear power plant implementing a separation of boric acid using a reverse osmosis membrane, characterized by the fact that it comprises steps consisting of treating the effluents using a multi-stage assembly composed of reverse osmosis modules comprising a membrane with a high boron rejection rate, arranged in parallel and in series, and recycling of the intermediate products to different points in the assembly.

Abstract: The present invention relates to a process for treating aqueous effluents from the primary circuit of a nuclear power plant implementing a separation of boric acid using a reverse osmosis membrane, characterized by the fact that it comprises steps consisting of treating the effluents using a multi-stage assembly composed of reverse osmosis modules comprising a membrane with a high boron rejection rate, arranged in parallel and in series, and recycling of the intermediate products to different points in the assembly.

Abstract: A process for separating a gaseous or liquid mixture by means of a separating device including a first volume and a second volume which are separated by a membrane which has selective permeability with respect to at least two components of the mixture, comprising the following steps: a) fill up the first volume of the device with the mixture to be separated; b) wait for a period of time 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 the mixture passes from the first to the second volume of the device through the membrane; and c) evacuate the first and the second volume of the device, as a result of which at least one first and one second cut of the mixture is obtained, having different molar compositions.

Abstract: 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.