Dow Global Technolgoies LLC

The Dow Chemical Company

Stevens Institute of Technology

Rohm and Haas Company

The Cynara Co.

David J Moll

Ritchie A Wessling

Stephen E Bales

Henry N Beck

George J Quarderer, Jr

Thomas O Jeanes

William I Harris

Thomas Caldwell Young

Kent B McReynolds

Alan F Burmester

Charles Z Hotz

Bethanne L Smith

Ronald M Lacher

James E Clark

Steven Douglas Jons

Chan Han

George P Korfiatis

Michael S Koreltz

Harlan Robert Goltz

Fredrick W Vance

Xiaoguang Meng

Christos Christodoulatos

Mazakhir Dadachov

Geofrey Paul Onifer

Daniel B Rice

Robert E Reim

Peter E M Aerts

William J Harris

Thomas E Fisk

H Craig Silvis

Alfred Karl Schultz

William E Mickols

Joseph Dooley

Charles R Marston

Scott T Burr

Gregoire Cardoen

Patrick B Smith

Gavin D Vogel

Gerald F Billovits

Mark A Spalding

Donald B Streeter

Gregg L Poppe

A method of making a composite membrane comprising the steps of forming a discriminating layer upon a surface of a porous support by sequentially applying immiscible coating solutions upon the support, wherein one coating solution comprises a crosslinking agent and another coating solution comprises a block copolymer, and the block copolymer comprises sacrificial segments and durable segments including reactive pendent groups which react with the crosslinking agent and form a crosslinked matrix comprising micro-domains of the sacrificial segments, and removing at least a portion of the sacrificial segments to yield pores.

Composite membrane

A water-insoluble copolymer including an epoxide containing structural unit represented by Formula (I), wherein: the epoxide containing group is positioned meta, ortho or para on the ring relative to the bond linkage with the polymer backbone; L is an optional linking group; and R, Rand Rare independently selected from: hydrogen, or a substituted or unsubstituted hydrocarbyl group. 

Water insoluble copolymer including pendant aryl epoxide groups

The invention includes a spiral wound module comprising at least one membrane sheet wrapped about a permeate collection tube wherein the membrane sheet () comprises a plurality of capillary channels in parallel arrangement with each other and which are in fluid communication with the permeate collection tube (). Many additional embodiments are disclosed along with methods for making and using the module and corresponding components.

Spiral wound module including membrane sheet with capillary channels

A method for assembling an electrodeionization device comprising providing in a sequential arrangement: an anode, membrane cell assembly, cathode; wherein the membrane cell assembly comprises at least one sequential arrangement of: a cation exchange membrane, concentrating chamber, anion exchange membrane, diluting chamber, cation exchange membrane, concentrating chamber and anion exchange membrane. The method includes locating an ion exchange spacer in at least one chamber of the membrane cell assembly wherein an ion exchange spacer comprises an ion exchange resin and a dissolvable binder.

Electrodeionization device including ion exchange spacer and method of assembly

A tubesheet, modules incorporating tubesheets and methods for making and using the same. In one embodiment the invention includes a tubesheet comprising: i) a plurality of aligned semi-permeable hollow fiber membranes each comprising a cylindrical porous structure surrounding a lumen and extending between a first and second end and further comprising a first segment located adjacent the first end and a second segment located adjacent to the second end and ii) a block of potting material including an interfacial surface. The first segment of the hollow fiber membrane is embedded within the block of potting material and the second segment extends from the interfacial surface of the block. The tubesheet further comprises a penetrating extension of potting material within the porous structure of the second segment of the hollow fiber membrane that extends along a length from the interfacial surface of the block to a distal end.

Tubesheet and method for making and using the same

A filtration module comprising at least one membrane sheet comprising a plurality of capillary channels in parallel arrangement with each other and which are in fluid communication with a header.

Filtration module including membrane sheet with capillary channels

A spiral wound module assembly comprising: a permeate collection tube, at least one membrane envelope wound about the permeate collection tube, an outer module housing, and at least one acoustic transducer located adjacent to the permeate collection tube. Several embodiments are disclosed including a stand-alone probe adapted for insertion into the permeate collection tube. In several other embodiments, one or more transducers are secured to the inner surface of the permeate collection tube. The invention further includes a method of measuring membrane fouling within a spiral wound module comprising the steps of: a) transmitting an acoustic signal from a location adjacent to the permeate collection tube; b) receiving an echo signal resulting from the transmitted acoustic signal reflecting from an interface within the module; c) providing a reference signal corresponding to a known state of membrane fouling; d) comparing the echo signal to the reference signal; and e) determining a state of membrane fouling based upon the comparison of the echo signal and reference signal.

Use of acoustic signals for measuring membrane fouling in spiral wound modules

A method for making dual-sided membrane sheet comprises the steps of: a) forming a microporous polymer sheet including a plurality of capillary channels and b) forming a semi-permeable discriminating layer upon at least a portion of the opposing outer surfaces of the sheet, wherein the sheet is advanced along a production pathway during at least a portion of: step a), step b), or while transferring the sheet from step a) to step b) by engaging the sheet along one or more of its edge sections.

Dual-sided membrane sheet and method for making the same

A method for removing dissolved contaminants from solution using a surface-activated crystalline titanium oxide product having a high adsorptive capacity and a high rate of adsorption with respect to dissolved contaminants, in particular, arsenate and arsenite. Preferably, the titanium oxide product includes crystalline anatase having primary crystallite diameters in the range of 1-30 nm. The surface-activated titanium oxide is combined with other filter media to further improve the removal of dissolved contaminants.

Methods of preparing a surface-activated titanium oxide product and of using same in water treatment processes

Gas separations utilizing glassy polymer membranes at sub-ambient

This invention relates to a method of and apparatus for separating component gases in a gas mixture employing a glassy polymer membrane at temperatures of 5.degree. C. or less so as to achieve superior separation of gas components.

A method and apparatus for determining the effects of pressure and/or dissoved gas on the molecular dynamics in solids, such as glassy polymers, or gases sorbed by the solids, involves the use of nuclear magnetic resonance (NMR) spectroscopy wherein a pressure resistant sample cell is combined with an NMR probe which in turn is subjected to a magnetic field, a diffusion gas being injected into the sample cell under varying pressure with resultant NMR spectra being collected and correlated.

Method and apparatus for determining molecular dynamics of materials

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Midland, MI, United States of America

David J Moll