WARREN A WAITE
Engineering in Burlington, MA
License number
Massachusetts 11447
Expiration Date
Jun 30, 1992
Type
Chemical Engineer
Address
Address
Burlington, MA 01803
Personal information
See more information about WARREN A WAITE at radaris.comName
Address
Phone
12 Pleasant St, Burlington, MA 01803
Burlington, MA
12 Pleasant St, Burlington, MA 01803
Professional information
See more information about WARREN A WAITE at trustoria.com
Composite Semipermeable Membrane
Composite Semipermeable Membrane
US Patent:
4802984, Feb 7, 1989
Filed:
May 4, 1988
Appl. No.:
7/190204
Inventors:
Warren A. Waite - Burlington MA
Assignee:
Ionics, Incorporated - Watertown MA
International Classification:
B01D 1300
US Classification:
210490
Abstract:
A composite semipermeable membrane on a semiporous support or substrate is produced by employing an interfacial polymerization reaction between (1) an aqueous phase comprising a blend of water soluble and water dispersable compounds and (2) an organic phase comprising poly-functional crosslinking reagents capable of reacting and/or polymerizing with one or more of the ingredients of said aqueous phase.
Synthesis Of Anion Exchange Polymers Employing Ditertiary Amines
Synthesis Of Anion Exchange Polymers Employing Ditertiary Amines
US Patent:
4373031, Feb 8, 1983
Filed:
Sep 25, 1980
Appl. No.:
6/190787
Inventors:
Warren A. Waite - Burlington MA
Assignee:
Ionics, Incorporated - Watertown MA
International Classification:
B01J 4104
US Classification:
521 32
Abstract:
The reaction of vinylbenzyl chloride and N, N, N', N', 2-pentamethyl-1,2-propanediamine (PMPDA) produces a high capacity, base stable, crosslinked, anion exchange polymer useful especially when manufactured in sheet or membrane form for use in electrodialysis apparatus.
Chlorine Tolerant Composite Semipermeable Membrane
Chlorine Tolerant Composite Semipermeable Membrane
US Patent:
4913816, Apr 3, 1990
Filed:
Dec 1, 1988
Appl. No.:
7/278524
Inventors:
Warren A. Waite - Burlington MA
Assignee:
Ionics Incorporated - Watertown MA
International Classification:
B01D 1300
US Classification:
210490
Abstract:
A thin film composite (TFC) semipermeable membrane on a semiporous substrate is produced by an interfacial polymerization reaction between (1) an aqueous phase comprising a blend of water soluble and water dispersable compounds, (the latter being a chlorine or other oxidant neutralizer which protects the resulting semipermeable membrane from short term damage by chlorine or other oxidants) and (2) an organic phase comprising polyfunctional crosslinking reagents capable of reacting and/or polymerizing with one or more of the ingredients of said aqueous phase.
Composite Semipermeable Membrane Created By Precipitation Of Emulsion Polymers Onto Base Film Microporous Surfaces
Composite Semipermeable Membrane Created By Precipitation Of Emulsion Polymers Onto Base Film Microporous Surfaces
US Patent:
5075011, Dec 24, 1991
Filed:
Feb 19, 1991
Appl. No.:
7/656320
Inventors:
Warren A. Waite - Burlington MA
Assignee:
Ionics, Incorporated - Watertown MA
International Classification:
B01D 6102, B01D 6114
US Classification:
210644
Abstract:
A composite semipermeable membrane having improved chlorine tolerance, produced by employing the development of a thin film polymer layer by precipitation of the polymer at the interface of an aqueous (or organic) liquid layer; and an aqueous emulsion polymer layer at or near the surface of a semiporous support or substrate. No chemical reaction is involved.
Anti-Fouling Semi-Permeable Membrane System
Anti-Fouling Semi-Permeable Membrane System
US Patent:
5102547, Apr 7, 1992
Filed:
Jun 21, 1991
Appl. No.:
7/718580
Inventors:
Warren A. Waite - Burlington MA
Hans I. Viklund - Marlboro MA
Hans I. Viklund - Marlboro MA
Assignee:
Ionics, Incorporated - Watertown MA
International Classification:
F01D 6502
US Classification:
210501
Abstract:
Semi-permeable membrane and membrane/support assemblies and systems for microfiltration, ultrafiltration, nanofiltration, reverse osmosis, electrodialysis, electrodeionization and piezodialysis filter systems are formed of polymer membranes (14), including fine particle moieties (24) or threads (16) of substantially water insoluble, oligodynamic bioactive (biostatic and/or biocidal) dispersed material. When these membranes systems are used in aqueous liquids the dispersed material dissolves slowly and provides a continuous biostatic and/or biocidal action over a long duration to counteract membrane fouling propensities of the system environment.
Ion-Exchange Membranes Reinforced With Non-Woven Carbon Fibers
Ion-Exchange Membranes Reinforced With Non-Woven Carbon Fibers
US Patent:
4505797, Mar 19, 1985
Filed:
Mar 24, 1983
Appl. No.:
6/478603
Inventors:
Russell B. Hodgdon - Sudbury MA
Warren A. Waite - Burlington MA
Warren A. Waite - Burlington MA
Assignee:
Ionics, Incorporated - Watertown MA
International Classification:
C25B 900, C08D 520
US Classification:
204252
Abstract:
This invention is directed to electrodialysis, electrochemical membrane cells and particularly to components comprising the ion-exchange membranes. These membranes are fabricated containing a reinforcing structure comprised of non-woven carbon fibers derived for example from carbonized polyacrylonitrile. The membranes so produced have a low D. C. electrical resistance (increased conductivity) which enables electrodialysis to be performed more economically.
Selectively Permeable Barriers
Selectively Permeable Barriers
US Patent:
5147553, Sep 15, 1992
Filed:
Mar 29, 1991
Appl. No.:
7/677201
Inventors:
Warren A. Waite - Burlington MA
Assignee:
Ionics, Incorporated - Watertown MA
International Classification:
B01D 6100
US Classification:
210654
Abstract:
Apparatus and process for separating a fluid mixture into less permeable and more permeable fractions employing novel selectively permeable barriers comprised of a porous, emulsion treated substrate and a non-porous selectively permeable barrier layer thereon.