公开(公告)号：US10518221B2

公开(公告)日：2019-12-31

申请号：US15747907

申请日：2016-07-29

Applicant: Gradiant Corporation

Inventor： Looh Tchuin Choong ,  Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam ,  Jonn-Ross Andrews ,  Karim M. Chehayeb

IPC: B01D61/58 ,  B01D61/00 ,  B01D61/02 ,  C02F1/44 ,  C02F103/08

Abstract: Provided herein are osmotic desalination methods and associated systems. According to certain embodiments, multiple osmotic membranes may be used to perform a series of osmosis steps, such that an output stream having a relatively high water purity—compared to a water purity of an aqueous feed stream—is produced. In some embodiments, multiple draw streams can be used to produce aqueous product streams having sequentially higher purities of water. Certain embodiments are related to osmotic desalination systems and methods in which forward osmosis is used to produce a first product stream having a relatively high water purity relative to an aqueous feed stream, and reverse osmosis is used to perform a second step (and/or additional steps) on the first product stream. In some embodiments, multiple reverse osmosis steps can be used in series to perform a net desalination process.

公开(公告)号：US20190009218A1

公开(公告)日：2019-01-10

申请号：US15747907

申请日：2016-07-29

Applicant: Gradiant Corporation

Inventor： Looh Tchuin Choong ,  Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam ,  Jonn-Ross Andrews ,  Karim M. Chehayeb

IPC: B01D61/58 ,  B01D61/00 ,  B01D61/02 ,  C02F1/44

CPC classification number: B01D61/58 ,  B01D61/002 ,  B01D61/022 ,  B01D61/025 ,  B01D2311/14 ,  B01D2317/025 ,  C02F1/44 ,  C02F1/441 ,  C02F1/445 ,  C02F2103/08 ,  C02F2301/08 ,  Y02A20/131

Abstract: Provided herein are osmotic desalination methods and associated systems. According to certain embodiments, multiple osmotic membranes may be used to perform a series of osmosis steps, such that an output stream having a relatively high water purity—compared to a water purity of an aqueous feed stream—is produced. In some embodiments, multiple draw streams can be NI used to produce aqueous product streams having sequentially higher purities of water. Certain embodiments are related to osmotic desalination systems and methods in which forward osmosis is used to produce a first product stream having a relatively high water purity relative to an aqueous feed stream, and reverse osmosis is used to perform a second step (and/or additional steps) on the first product stream. In some embodiments, multiple reverse osmosis steps can be used in series to perform a net desalination process.

公开(公告)号：US20180244545A1

公开(公告)日：2018-08-30

申请号：US15752619

申请日：2016-08-12

Applicant: Gradiant Corporation

Inventor： Maximus G. St. John ,  Looh Tchuin Choong ,  Prakash Narayan Govindan

IPC: C02F1/44 ,  B01D61/58

CPC classification number: C02F1/441 ,  B01D61/002 ,  B01D61/025 ,  B01D61/027 ,  B01D61/58 ,  B01D2311/25 ,  B01D2317/025 ,  B01D2317/06 ,  B01D2319/06 ,  C02F1/442 ,  C02F1/445 ,  C02F1/4695 ,  C02F2209/03

Abstract: Disclosed herein are systems and methods in which multivalent ions are selectively retained in an aqueous stream. According to certain embodiments, multiple separations may be used to process an aqueous feed stream containing solubilized monovalent ions and solubilized multivalent ions to produce a stream enriched in the solubilized multivalent ions. The separations may be arranged, according to certain embodiments, to enhance the overall separation process such that the product stream contains—relative to the initial aqueous feed stream—a high amount of solubilized multivalent ions, a high amount of water from the aqueous feed stream, and/or a high ratio of solubilized multivalent ions to solubilized monovalent ions.

公开(公告)号：US20180236406A1

公开(公告)日：2018-08-23

申请号：US15752626

申请日：2016-08-12

Applicant: Gradiant Corporation

Inventor： Maximus G. St. John ,  Looh Tchuin Choong ,  Prakash Narayan Govindan

IPC: B01D61/58 ,  B01D69/02 ,  C02F1/44

CPC classification number: B01D61/58 ,  B01D61/002 ,  B01D61/025 ,  B01D61/027 ,  B01D69/02 ,  B01D2311/25 ,  B01D2317/025 ,  B01D2325/20 ,  C02F1/441 ,  C02F1/442 ,  C02F1/445 ,  C02F2301/046

Abstract: Disclosed herein are systems and methods in which ion-selective separation and multi-stage osmotic separation is used to produce multivalent-ion-rich process streams. According to certain embodiments, multiple separations may be used to process an aqueous feed stream containing solubilized monovalent ions and solubilized multivalent ions to produce a stream enriched in the multivalent ions. The separations may be arranged, according to certain embodiments, to enhance the overall separation process such that the product stream contains—relative to the initial aqueous feed stream—a high amount of multivalent ions, a high amount of water from the aqueous feed stream, and/or a high ratio of multivalent ions to monovalent ions.