Patent ID: 9126149
Filing Date: 2015-09-08
Classification: B01D,C02F,Y02A

Abstract:
1. A process for desalinating water, comprising: a. directing the water to a reverse osmosis or distillation unit and producing at least partially desalinated water and a first concentrate; b. directing the first concentrate to a first demineralization unit and subjecting the first concentrate to nanofiltration which produces a permeate and a second concentrate; c. directing the second concentrate to a second demineralization unit that includes an ion exchange having at least one active material including a cationic or anionic-type ion exchange resin and treating the second concentrate in the ion exchange to produce a third concentrate and at least partially demineralized water; d. mixing the at least partially demineralized water with the at least partially desalinated water; e. regenerating the ion exchange resin; and f. utilizing the permeate produced by the first demineralization unit to regenerate the ion exchange resin.