Dow Global Technolgoies LLC

Ddp Specialty Electronic Materials Us, LLC

The Dow Chemical Company

Filmtec Corporation

Steven Douglas Jons

Ian A Tomlinson

Bei Yin

Mou Paul

Thomas E Fisk

Freddie L Singleton

Abhishek Roy

Steven Rosenberg

XiaoHua Qiu

Luke Franklin

Tina L Arrowood

Jon E Johnson

Martin H Peery

Joseph D Koob

Robert C Cieslinski

Michael S Koreltz

Aman A Desai

David D Hawn

Allyn R Marsh, Iii

Chunming Zhang

David J Moll

Santhosh K Ramalingam

Pearl I Moody

William E Mickols

Michael Salvatore Ferritto

Christopher J Siler

Charles D Gartner

Alvin O Larson

Michael A Fialkowski

Joseph Dooley

Kenneth J Stutts

John H Mallard

Gerald F Billovits

Chengli Zu

Huang Wu

Roy A Davis

Mark A Spalding

Janardhanan S Rajan

Russ Schaffenberg

Allyn R Marsh

William A Jons

Jessica Y Shu

Gregg L Poppe

Jia Ning

Derek M Stevens

Anand S Badami

XiaoHua Sam Qiu

Steven Rosenburg

Janardhans S Rajan

Allyn R Marsh Iii

Markus Busch

Stuart Mcclellan

Michael Fialkowski

A spiral wound membrane module including a specialized endcap assembly including a connecting conduit defining a passageway extending radially inward from its outer periphery, and a differential pressure sensor connected to the passageway of the connecting conduit.

Measurement of pressure differences within a vessel of spiral wound membrane modules

A spiral wound assembly including a pressure vessel including an inner chamber, feed inlet, concentrate outlet and permeate outlet and a spiral wound membrane module located within the inner chamber of the pressure vessel; wherein the assembly is characterized by including:

Spiral wound assembly with integrated flow restrictor and sensor

A spiral wound module assembly including:

Spiral wound module assembly including integrated pressure monitoring

A spiral wound membrane module including a specialized end cap assembly including a connecting conduit defining a passageway extending radially inward from its outer periphery, and a differential pressure sensor connected to the passageway of the connecting conduit.

Spiral wound membrane module including integrated differential pressure monitoring

A spiral wound membrane module adapted for hyperfiltration and including at least one membrane envelope and feed spacer sheet wound about a central permeate tube to form an inlet and outlet scroll face and an outer periphery,

Spiral wound membrane module adapted for high recovery

A spiral wound filtration assembly including:

Spiral wound filtration assembly including integral bioreactor

A filtration assembly including: a hyperfiltration assembly including: a high pressure vessel including a feed port, concentrate port and permeate port, and a plurality of serially arranged spiral wound hyperfiltration membrane modules; a bioreactor assembly including: a low pressure vessel comprising a first and second port, and a plurality of spiral wound bioreactors located within the low pressure vessel with each bioreactor comprising a flat sheet having two opposing bio-growth surfaces and a feed spacer spirally wound about an axis; and a fluid flow pathway extending from a fluid feed source: into the first port of the low pressure vessel, through the bioreactors and out the second port of the low pressure vessel, and into the feed port of the high pressure vessel, through the membrane modules and out of the concentrate port and permeate port.

Filtration assembly including spiral wound bioreactors and membrane modules positioned in separate pressure vessels

A filtration assembly including: i) a hyperfiltration assembly including: a high pressure vessel including a feed port, concentrate port and permeate port, and a plurality of serially arranged spiral wound hyperfiltration membrane modules; ii) a bioreactor assembly including: a plurality of spiral wound bioreactors each comprising a flat sheet having two opposing bio-growth surfaces and a feed spacer spirally wound about an axis (Y); and iii) a fluid flow pathway adapted for fluid connection with a fluid feed source and extending in a parallel flow pattern through the bioreactors, and subsequently into the feed port of the high pressure vessel, successively through the spiral wound hyperfiltration membrane modules in a serial flow pattern and out of the concentrate port and permeate port.

Filtration assembly including spiral wound bioreactors and hyperfiltration membrane modules

A spiral wound membrane module adapted for hyperfiltration and including at least one membrane envelope and feed spacer sheet wound about a central permeate tube to form an inlet and outlet scroll face and an outer periphery, wherein the feed spacer sheet includes: i) a feed entrance section extending along the permeate collection tube from the inlet scroll face toward the outlet scroll face, ii) a feed exit section extending along the outer periphery from the outlet scroll face toward the inlet scroll face, and iii) a central feed section located between the feed entrance section and the feed exit section; and wherein the feed entrance section has a median resistance to flow in a direction parallel to the permeate collection tube that is less than 25% of the median resistance to flow of the central feed section in a direction perpendicular to the permeate collection tube.

A filter assembly adapted for insertion into an inner chamber of a pressure vessel, wherein the assembly includes: a spiral wound membrane module () comprising at least one membrane envelope () and feed spacer sheet () concentrically wound about a central permeate tube () extending along an axis (X) forming an inlet scroll face () and outlet scroll face () and a cylindrical outer peripheral surface (), an end cap () having a surface () covering a portion of the inlet scroll face () and at least one opening () in the end cap surface () near the permeate tube for permitting fluid to flow through the inlet scroll face () and into the feed spacer sheet () of the module (), and a brine seal () having a radially extending flexible lip () defining a maximum outer diameter adapted to engage the inner chamber of the pressure vessel; wherein the brine seal is sealed to the end cap ().

Filter assembly including spiral wound module, brine seal and end cap

A filter assembly adapted for insertion into an inner chamber of a pressure vessel, wherein the assembly includes: a spiral wound membrane module including at least one membrane envelope and feed spacer sheet concentrically wound about a central permeate tube extending along an axis (X) forming an inlet scroll face and outlet scroll face and a cylindrical outer peripheral surface, and a brine seal disposed concentrically about a portion of the outer peripheral surface; characterized by the brine seal including: i) a radially extending flexible lip defining a maximum outer diameter adapted to engage the inner chamber of the pressure vessel, ii) an end cap surface covering a portion of the first scroll face, and iii) at least one opening in the end cap surface for permitting fluid to flow through the inlet scroll face and into the feed spacer sheet of the module.

Filter assembly including spiral wound membrane module and brine seal

A water treatment assembly () and method for its operation, comprising a spiral wound hyperfiltration membrane module () connected to: i) a feed line () adapted for connection to a source of pressurized feed water, ii) a permeate line () adapted for connection to a dispenser of treated water and iii) a concentrate line () adapted for connection with a drain; wherein the assembly includes a pressurizable reservoir () containing weak acid cation exchange resin () and further includes at least one valve for selectively diverting flow of pressurized feed water along the feed line (), through the reservoir () and returning to the feed line () prior to passing through the hyperfiltration membrane module ().

Water treatment assembly including hyperfiltration module and cation exchange resin

A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer including the steps of applying a polyfunctional amine monomer and a combination amine-reactive compounds to a surface of the porous support and reacting the constituents to form a thin film polyamide layer, wherein the amine-reactive compounds include: i) a polyfunctional amine-reactive monomer including two to three amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, ii) a polyfunctional amine-reactive monomer including at least four amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, and iii) an acid compound including at least on carboxylic acid moiety or salt thereof and at least one amine-reactive moiety selected from acyl halide and sulfonyl halide.

Membrane derived from polyfunctional amine and combination of different polyfunctional amine-reactive monomers

A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes the steps of applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer. The method is characterized by including a substituted benzamide monomer within the non-polar solution.

Composite polyamide membrane made using substituted benzamide monomer

A water treatment assembly comprising a spiral wound hyperfiltration membrane module connected to: i) a feed line adapted for connection to a source of pressurized feed water, ii) a permeate line adapted for connection to a dispenser of treated water and iii) a concentrate line adapted for connection with drain; wherein the assembly further includes a pressurizable reservoir with valves for selectively diverting flow of pressurized feed water along the feed line, through the reservoir and returning to the feed line prior to passing through the hyperfiltration membrane module.

Water treatment assembly including hyperfiltration module and pressurizable reservoir

Growing community of inventors

Eden Prairie, MN, United States of America

Steven Douglas Jons