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公开(公告)号：US20240109037A1
公开(公告)日：2024-04-04
申请号：US18315130
申请日：2023-05-10
Applicant: Gradiant Corporation
Inventor： Omkar Lokare , Richard Stover , Looh Tchuin Choong , Kurt Blohm , Ana Claudia Emerenciano Guedes
CPC classification number: B01D61/026 , B01D69/02 , C02F1/441 , B01D2317/022 , B01D2317/025 , B01D2317/04 , B01D2325/34 , C02F2103/08
Abstract: Liquid solution separation (e.g., concentration and/or desalination) methods and related systems involving membrane separators having at least one-semipermeable membrane are provided. In some instances, at least some of the membrane separators permit a portion of solute in a retentate side input stream to pass through the semi-permeable membrane. In some instances, multiple membrane separators are employed, with the membrane separators having different solute permeabilities (e.g., due to varying pore size and/or molecular weight cutoffs). The methods and systems may be configured such that the ratio of mass flow and/or concentration of solute entering the retentate sides of the membrane separators are relatively high compared to the mass flow and/or concentration of solute exiting the retentate sides of the membrane separators. Such ratios may be relatively high for some or all membrane separators employed, which can in some instances reduce capital and/or operational expenditures for the liquid separation processes.
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公开(公告)号：US20210179452A1
公开(公告)日：2021-06-17
申请号：US17270142
申请日：2019-08-22
Applicant: Gradiant Corporation
Inventor： Richard Stover , Looh Tchuin Choong , Maximus G. St. John , Prakash Narayan Govindan
Abstract: Liquid solution concentration systems, and related methods, are generally described. In some embodiments, the system is an osmotic system comprising a plurality of osmotic modules. For example, the osmotic system can comprise a feed osmotic module configured to produce an osmotic module retentate outlet stream having a higher concentration of solute than the retentate inlet stream transported to the feed osmotic module. The osmotic system can also comprise an isolation osmotic module fluidically connected to the feed osmotic module. The osmotic system can also optionally comprise a purification osmotic module fluidically connected to the feed osmotic module and/or the isolation osmotic module. Certain embodiments are related to altering the degree to which the feed osmotic module retentate outlet stream is recycled back to the retentate-side inlet of the feed osmotic module during operation. Additional embodiments are related to the manner in which the retentate-side effluent from the isolation osmotic module is distributed among the system modules during operation.
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公开(公告)号：US20220380233A1
公开(公告)日：2022-12-01
申请号：US17882701
申请日：2022-08-08
Applicant: Gradiant Corporation
Inventor： Richard Stover
Abstract: Liquid solution concentration methods and related systems involving osmosis units and energy recovery are generally described. In some embodiments, an osmotic system has a pump, a first reverse osmosis unit, a second reverse osmosis unit, and one or more energy recovery devices. Various embodiments are directed to features such as balancing streams, recirculation streams, and/or valving that alone or in combination may afford improved energy efficiency and/or system performance. Some embodiments may improve performance of certain types of energy recovery devices in combination with osmosis units, such as isobaric or turbine energy recovery devices.
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公开(公告)号：US11629072B2
公开(公告)日：2023-04-18
申请号：US17270142
申请日：2019-08-22
Applicant: Gradiant Corporation
Inventor： Richard Stover , Looh Tchuin Choong , Maximus G. St. John , Prakash Narayan Govindan
IPC: B01D61/02 , C02F1/44 , C02F103/08
Abstract: Liquid solution concentration systems, and related methods, are generally described. In some embodiments, the system is an osmotic system comprising a plurality of osmotic modules. For example, the osmotic system can comprise a feed osmotic module configured to produce an osmotic module retentate outlet stream having a higher concentration of solute than the retentate inlet stream transported to the feed osmotic module. The osmotic system can also comprise an isolation osmotic module fluidically connected to the feed osmotic module. The osmotic system can also optionally comprise a purification osmotic module fluidically connected to the feed osmotic module and/or the isolation osmotic module. Certain embodiments are related to altering the degree to which the feed osmotic module retentate outlet stream is recycled back to the retentate-side inlet of the feed osmotic module during operation. Additional embodiments are related to the manner in which the retentate-side effluent from the isolation osmotic module is distributed among the system modules during operation.
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Patent Agency Ranking
公开(公告)号：US20240293775A1
公开(公告)日：2024-09-05
申请号：US18574595
申请日：2022-07-01
Applicant: Gradiant Corporation
Inventor： Omkar Lokare , Richard Stover
CPC classification number: B01D61/026 , B01D61/08 , B01D67/0006 , B01D69/1071 , B01D71/56 , C02F1/441 , B01D2311/08 , B01D2313/243 , B01D2317/022 , C02F2301/08
Abstract: A serial filtration system for liquid purification includes a preliminary-stage reverse-osmosis (RO) module and a first-stage, high-permeability, reverse-osmosis (HiRO) module. Both modules include (a) a chamber including an inlet, a retentate outlet, and a permeate outlet, and (b) at least one membrane separating the chamber into a retentate side on an upstream side of the membrane and a permeate side on a downstream side of the membrane. The membrane in the preliminary stage is an RO membrane, while the membrane in the first stage is an oxidized membrane. The first-stage inlet is in fluid communication with the preliminary-stage, retentate outlet; and the oxidized membrane in the first stage, comprises an oxidized polyamide active layer coated on a porous support, wherein the oxidized polyamide active layer has an atomic oxygen/nitrogen ratio of at least 1.5.
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公开(公告)号：US20230001355A1
公开(公告)日：2023-01-05
申请号：US17305289
申请日：2021-07-02
Applicant: Gradiant Corporation
Inventor： Omkar Lokare , Richard Stover
Abstract: A serial filtration system for liquid purification includes a preliminary-stage reverse-osmosis (RO) module and a first-stage, high-permeability, reverse-osmosis (HiRO) module. Both modules include (a) a chamber including an inlet, a retentate outlet, and a permeate outlet, and (b) at least one membrane separating the chamber into a retentate side on an upstream side of the membrane and a permeate side on a downstream side of the membrane. The membrane in the preliminary stage is an RO membrane, while the membrane in the first stage is an oxidized membrane. The first-stage inlet is in fluid communication with the preliminary-stage, retentate outlet; and the oxidized membrane in the first stage, comprises an oxidized polyamide active layer coated on a porous support, wherein the oxidized polyamide active layer has an atomic oxygen/nitrogen ratio of at least 1.5.
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公开(公告)号：US11534719B1
公开(公告)日：2022-12-27
申请号：US17305289
申请日：2021-07-02
Applicant: Gradiant Corporation
Inventor： Omkar Lokare , Richard Stover
Abstract: A serial filtration system for liquid purification includes a preliminary-stage reverse-osmosis (RO) module and a first-stage, high-permeability, reverse-osmosis (HiRO) module. Both modules include (a) a chamber including an inlet, a retentate outlet, and a permeate outlet, and (b) at least one membrane separating the chamber into a retentate side on an upstream side of the membrane and a permeate side on a downstream side of the membrane. The membrane in the preliminary stage is an RO membrane, while the membrane in the first stage is an oxidized membrane. The first-stage inlet is in fluid communication with the preliminary-stage, retentate outlet; and the oxidized membrane in the first stage, comprises an oxidized polyamide active layer coated on a porous support, wherein the oxidized polyamide active layer has an atomic oxygen/nitrogen ratio of at least 1.5.
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公开(公告)号：US20230257285A1
公开(公告)日：2023-08-17
申请号：US18137630
申请日：2023-04-21
Applicant: Gradiant Corporation
Inventor： Richard Stover
CPC classification number: C02F1/441 , C02F1/265 , B01D61/06 , C02F2301/066 , C02F2303/10 , B01D61/026
Abstract: Liquid solution concentration methods and related systems involving osmosis units and energy recovery are generally described. In some embodiments, an osmotic system has a pump, a first reverse osmosis unit, a second reverse osmosis unit, and one or more energy recovery devices. Various embodiments are directed to features such as balancing streams, recirculation streams, and/or valving that alone or in combination may afford improved energy efficiency and/or system performance. Some embodiments may improve performance of certain types of energy recovery devices in combination with osmosis units, such as isobaric or turbine energy recovery devices.
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公开(公告)号：US11667549B2
公开(公告)日：2023-06-06
申请号：US17882701
申请日：2022-08-08
Applicant: Gradiant Corporation
Inventor： Richard Stover
CPC classification number: C02F1/441 , B01D61/06 , C02F1/265 , B01D61/026 , B01D2317/022 , C02F2301/066 , C02F2303/10
Abstract: Liquid solution concentration methods and related systems involving osmosis units and energy recovery are generally described. In some embodiments, an osmotic system has a pump, a first reverse osmosis unit, a second reverse osmosis unit, and one or more energy recovery devices. Various embodiments are directed to features such as balancing streams, recirculation streams, and/or valving that alone or in combination may afford improved energy efficiency and/or system performance. Some embodiments may improve performance of certain types of energy recovery devices in combination with osmosis units, such as isobaric or turbine energy recovery devices.
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