Millipore Corporation

Millipore Investment Holdings, Ltd.

Andrew G Proulx

George Carmichael

Benny Garcia

Steven R Pearl

Brian Hillier

An improved electrodeionization system for removing ions from liquids passed therethrough, comprising a flow-through electrodeionization module, and a power supply electrically connected to the electrodeionization module electrodes so as to establish a voltage gradient thereacross. The invention includes a monitoring device such as a resistivity sensor for monitoring the value of a property (e.g. resistivity) of the liquid output flow from the electrodeionization module, and a controller responsive to the monitoring device, for controlling the amount of time that the power supply is turned on, to maintain output quality within a predetermined range, while conserving power and simplifying power supply design.

Electrodeionization process

The present invention provides methods and devices for producing a subassembly for devices designed to receive particulate matter in a compartment of predetermined shape.

Methods for producing solid subassemblies of fluidic particulate matter

Electrodeionization system

A membrane module in which non-porous membranes are bonded to spacer elements, which elements are in turn bonded to each other to create a membrane support zone as a result of contact with the surface of the membrane opposite the surface to which the membrane is bonded. The membrane is restrained from peeling from the membrane bond by the support zone under opposing pressure as may be caused by fluid flowing past the membrane. The preferred use of such a membrane module is for continuous electrodeionization processes.

Membrane module assembly

A manifold segment is provided for tangential flow filtration apparatus. The manifold segment includes a fluid feed conduit, a retentate conduit, a filtrate inlet and a filtrate outlet. An adaptor manifold is provided which directs filtrate from the manifold segment into a tangential flow filtration module and directs filtrate from the module into the manifold segment. Filtrate introduced into the tangential flow filtrate module reduces pressure drop across a filter layer in the module.

Manifold apparatus for tangential flow filtration apparatus

A tangential flow filtration apparatus which utilizes a single manifold formed of a stack of manifold segments to introduce liquid to be filtered into the apparatus and to remove a filtrate stream and a retentate stream from the apparatus is provided. A plurality of filtration modules are stacked between the manifold and a plate. Holes and sealing means are provided within the filtration modules to effect flow of the filtrate, retentate and feed liquid through the stack and manifold while preventing admixture of the filtrate with the retentate or the feed liquid. A feed manifold is positioned at an intermediate position within the stack of manifold segments. All manifold segments with the exception of the most downstream manifold segment or most upstream manifold segment from the point of introducing incoming liquid must have a filtrate exit from both ends of the manifold segment. The most downstream or the most upstream manifold segment also can have filtrate exits from both of its ends.

Manifold segment stack with intermediate feed manifold

A tangential flow filtration apparatus which utilizes a single manifold formed of manifold segment or manifold segments to introduce liquid to be filtered into the apparatus and to remove a filtrate stream and a retentate stream from the apparatus is provided. A plurality of filtration modules are stacked between the manifold and a plate. Holes and sealing means are provided within the filtration modules to effect flow of the filtrate, retentate and incoming liquid through the stack and manifold while preventing admixture of the filtrate with the retentate or the incoming liquid. All manifold segments with the exception the most downstream manifold segment or most upstream manifold segment from the point of introducing incoming liquid must have a filtrate to exit from both ends of the manifold segment. The most downstream or the most upstream manifold segment also can have filtrate exits from both of its ends.

Growing community of inventors

Concord, MA, United States of America

Andrew G Proulx