1
Ingo Blume, Ingo Pinnau: Composite membrane, method of preparation and use. Membrane Technology & Research, J Farrant, October 16, 1990: US04963165 (91 worldwide citation)

A membrane for gas separation or pervaporation. The membrane is a composite of a microporous support membrane and an ultrathin permselective membrane, the permselective membrane being made from a polyamide-polyether block copolymer having the general form: ##STR1## where PA is a saturated aliphatic ...


2
Kenneth G Watler: Process for separating higher hydrocarbons from natural or produced gas streams. Membrane Technology & Research, K Watler, J Farrant, August 15, 1989: US04857078 (62 worldwide citation)

A process for separating ethane and other higher hydrocarbons from a natural or produced gas stream, having methane as its major constituent. A rubbery permselective membrane, having a propane/methane selectivity of 8 or above, is contacted on its feed side with a gas mixture typically containing me ...


3
Richard W Baker, Jenny Louie, Peter H Pfromm, Johannes G Wijmans: Ultrathin composite metal membranes. Membrane Technology & Research, J Farrant, August 15, 1989: US04857080 (60 worldwide citation)

An ultrathin, high-flux composite membrane for use in gas separation. The membrane comprises a metal layer, typically 500.ANG. or less thick on a microporous support. The support may be as asymmetric Loeb-Sourirajan type membrane or a two-layer composite of a microporous substrate with a very thin s ...


4
Richard W Baker, Paul Shrock: Multilayer composite protective fabric material and use in protective clothing. Membrane Technology & Research, J Farrant, July 24, 1990: US04943475 (57 worldwide citation)

A multilayer composite fabric material consisting of a woven or non-woven fabric support, a microporous membrane layer, and an ultrathin permselective surface coating, and optionally an intermediate sealing layer and a protective top layer; the material being freely permeable to water vapor but impe ...


5
Johannes G Wijmans: Process for removing condensable components from gas streams. Membrane Technology & Research, J Farrant, February 18, 1992: US05089033 (55 worldwide citation)

A process for treating a gas stream to remove or recover a condensable component. The process involves a condensation step and a membrane concentration step. The condensation step may be followed by the membrane step, or vice versa. The process can be designed to yield only two product streams: one, ...


6
Amulya L Athayde, Richard W Baker: Protective clothing material. Membrane Technology & Research, J Farrant, June 18, 1991: US05024594 (48 worldwide citation)

A protective material having a membrane layer and a sorbent layer. The membrane is a thin-film composite membrane permeable to water vapor but relatively impermeable to organic vapors. The sorbent layer includes activated carbon or other sorbent or reactive material, and captures traces of organic v ...


7
Richard W Baker, Johannes G Wijmans: Two-stage membrane process and apparatus. Membrane Technology & Research, J Farrant, October 26, 1993: US05256295 (37 worldwide citation)

A membrane separation process and system for removing a component from a fluid stream. An auxiliary membrane module or set of modules is installed across the second stage of a two-stage membrane separation system. The driving force for the auxiliary modules is provided by the pump or other driving u ...


8
Robert P Castro, Richard W Baker, Johannes G Wijmans: Multilayer interfacial composite membrane. Membrane Technology & Research, J Farrant, September 17, 1991: US05049167 (36 worldwide citation)

A composite membrane particularly useful for gas separation or pervaporation. The membrane has three layers: a microporous substrate, an intermediate sealing layer, and a top permselective layer. The permselective layer is made by interfacial polymerization directly on the sealing layer. The sealing ...


9
Johannes G Wijmans: Membrane process and apparatus for removing vapors from gas streams. Membrane Technology & Research, J Farrant, December 10, 1991: US05071451 (35 worldwide citation)

A membrane process and system for removing condensable vapors from gas streams is disclosed. The process includes a membrane separation step and a condensation or other recovery step. An auxiliary membrane module or set of modules is installed across the pump and condenser on the downstream side of ...


10
Richard W Baker, Carl Martin Bell, Johannes G Wijmans, Bernd Ahlers: Membrane process for treatment of fluorinated hydrocarbon-laden gas streams. Membrane Technology & Research, J Farrant, March 6, 1990: US04906256 (34 worldwide citation)

A membrane process for separating fluorinated hydrocarbon vapors is disclosed. The process employs a permselective membrane that is selectively permeable to fluorinated hydrocarbons over oxygen or nitrogen. The process involves contacting the feed side of the membrane with a gas mixture containing t ...