Abstract 1. A METHOD OF SOLVENT PURIFICATION FROM AN IMPURE SOLVENT BY REVERSE OSMOSIS, COMPRISING THE STEPS OF SUPPLYING IMPURE SOLVENT AT ONE SIDE OF A MEMBRANE, APPLYING A PRESSURE OF SAID IMPURE SOLVENT SUFFICIENTLY GREATER THAN THE OSMOTIC PRESSURE THEREOF TO PRODUCE A REVERSE OSMOTIC FLOW THROUGH SAID MEMBRANE, AND WITHDRAWING CONCENTRATE FORMING AT THE INPUT SIDE OF THE MEMBRANE IN A PREDETERMINED CYCLIC PULSED FLOW WHEREBY THE SOLVENT FLOW ACROSS THE INPUT FACE OF SAID MEMBRANE IS LIKEWISE PULSED, RESTRICTING FLOW DURING PERIODS OF MAXIMUM FLOW TO A PREDETERMINED AMOUNT WHICH WILL NOT MATERIALLY IMPART FLOW THROUGH THE MEMBRANE, BUT WHICH IS OPERATIVE TO PROVIDE FLOW TURBULENCE OVER THE MEMBRANE SURFACE WITH SUFFICIENT FLUSHING THEREOF ADEQUATE FOR PREVENTION OF EXCESSIVE BOUNDARY LAYER FORMATION AT SAID MEMBRANE AND SUSPENSION OF PARTICULATE MATERIAL IN SAID CONCENTRATE, AND INTERMEDIATE PREIODS OF AT LEAST A LESSER CONCENTRATE FLOW, ANY FLOW DURING SAID INTERMEDIATE PERIODS BEING SUBSTANTIALLY UNIFORM AND MATERILLY LESS THAN THAT NECESSARY TO PROVIDE SUCH A FLOW TURBULENCE AND FLUSHING ACTION, AND SAID INTERMEDIATE PERIODS HAVING A PREDETERMINED DURATION SUCH THAT ANY BOUNDARY LAYER FORMATION AND PARTICULATE DISASSOCIATION DURING SUCH INTERMEDIATE PERIODS IS MATERIALLY COUNTERED BY THE MAXIMUM FLOW AND PERIOD DURATION OF THE MAXIMUM FLOW PERIOD.
A METHOD OF SOLVENT PURIFICATION FROM AN IMPURE SOLVENT BY REVERSE OSMOSIS, COMPRISING THE STEPS OF SUPPLYING IMPURE SOLVENT AT ONE SIDE OF A MEMBRANE, APPLYING A PRESSURE OF SAID IMPURE SOLVENT SUFFICIENTLY GREATER THAN THE OSMOTIC PRESSURE THEREOF TO PRODUCE A REVERSE OSMOTIC FLOW THROUGH SAID MEMBRANE, AND WITHDRAWING CONCENTRATE FORMING AT THE INPUT SIDE OF THE MEMBRANE IN A PREDETERMINED CYCLIC PULSED FLOW WHEREBY THE SOLVENT FLOW ACROSS THE INPUT FACE OF SAID MEMBRANE IS LIKEWISE PULSED, RESTRICTING FLOW DURING PERIODS OF MAXIMUM FLOW TO A PREDETERMINED AMOUNT WHICH WILL NOT MATERIALLY IMPART FLOW THROUGH THE MEMBRANE, BUT WHICH IS OPERATIVE TO PROVIDE FLOW TURBULENCE OVER THE MEMBRANE SURFACE WITH SUFFICIENT FLUSHING THEREOF ADEQUATE FOR PREVENTION OF EXCESSIVE BOUNDARY LAYER FORMATION AT SAID MEMBRANE AND SUSPENSION OF PARTICULATE MATERIAL IN SAID CONCENTRATE, AND INTERMEDIATE PREIODS OF AT LEAST A LESSER CONCENTRATE FLOW, ANY FLOW DURING SAID INTERMEDIATE PERIODS BEING SUBSTANTIALLY UNIFORM AND MATERILLY LESS THAN THAT NECESSARY TO PROVIDE SUCH A FLOW TURBULENCE AND FLUSHING ACTION, AND SAID INTERMEDIATE PERIODS HAVING A PREDETERMINED DURATION SUCH THAT ANY BOUNDARY LAYER FORMATION AND PARTICULATE DISASSOCIATION DURING SUCH INTERMEDIATE PERIODS IS MATERIALLY COUNTERED BY THE MAXIMUM FLOW AND PERIOD DURATION OF THE MAXIMUM FLOW PERIOD.
Claim 2
Independent Claim
204 words
A METHOD OF SOLVENT PURIFICATION FROM AN IMPURE SOLVENT BY REVERSE OSMOSIS, COMPRISING THE STEPS OF SUPPLYING IMPURE SOLVENT AT ONE SIDE OF A MEMBRANE, APPLYING A PRESSURE OF SAID IMPURE SOLVENT SUFFICIENTLY GREATER THAN THE OSMOTIC PRESSURE THEREOF TO PRODUCE A REVERSE OSMOTIC FLOW THROUGH SAID MEMBRANE, AND WITHDRAWING CONCENTRATE FORMING AT THE INPUT SIDE OF THE MEMBRANE IN A PREDETERMINED CYCLIC PULSED FLOW WHEREBY THE SOLVENT FLOW ACROSS THE INPUT FACE OF SAID MEMBRANE IS LIKEWISE PULSED, RESTRICTING FLOW DURING PERIODS OF MAXIMUM FLOW TO A PREDETERMINED AMOUNT WHICH WILL NOT MATERIALLY IMPART FLOW THROUGH THE MEMBRANE, BUT WHICH IS OPERATIVE TO PROVIDE FLOW TURBULENCE OVER THE MEMBRANE SURFACE WITH SUFFICIENT FLUSHING THEREOF ADEQUATE FOR PREVENTION OF EXCESSIVE BOUNDARY LAYER FORMATION AT SAID MEMBRANE AND SUSPENSION OF PARTICULATE MATERIAL IN SAID CONCENTRATE, AND INTERMEDIATE PREIODS OF AT LEAST A LESSER CONCENTRATE FLOW, ANY FLOW DURING SAID INTERMEDIATE PERIODS BEING SUBSTANTIALLY UNIFORM AND MATERILLY LESS THAN THAT NECESSARY TO PROVIDE SUCH A FLOW TURBULENCE AND FLUSHING ACTION, AND SAID INTERMEDIATE PERIODS HAVING A PREDETERMINED DURATION SUCH THAT ANY BOUNDARY LAYER FORMATION AND PARTICULATE DISASSOCIATION DURING SUCH INTERMEDIATE PERIODS IS MATERIALLY COUNTERED BY THE MAXIMUM FLOW AND PERIOD DURATION OF THE MAXIMUM FLOW PERIOD.