General Electric Company

Other

Bl Technologies, Inc.

Steven John Harrold

Lawrence Charles Costa

Prashant Vishwanath Shrikhande

Yatin Tayalia

Phillip Goebel

Prasanna Rao Dontula

Xingpeng Zhang

Babu Narayanswamy

Cha Moua

Hua Li

Chen Xiao Wang

Wenqing Peng

Hua Wang

Joseph Anthony Suriano

Steven Thomas Rice

Bing Zhang

Su Lu

David Olson

Membrane elements that use multiple membrane leaves may have a limited total active membrane area due to an increased diameter at the ends of the element. Membrane leaves may comprise a permeate carrier positioned between one or more membrane sheets. Adhesive may be used to seal one or more edges of the membrane leaf. The membrane sheets, permeate carrier and the adhesive contribute to the thickness of the edges of the membrane leaf and the diameter at the ends of the element. A reduced thickness of the edges of the permeate carrier may reduce the diameter at the ends of an element. Another permeate carrier sheet may also be used that is distanced from at least one edge of the membrane sheet so the permeate carrier sheet does not contribute towards the increased diameter at the ends of the element.

Material efficiency and fabrication of membrane elements

The present disclosure describes an additive that may be used in the manufacture of thin-film polyamide composite membranes. Thin-film polyamide composite membranes are used in filtration processes, such as reverse osmosis and nanofiltration. The additive may be an amino-siloxane compound. The amino-siloxane compound includes repeated groups of silicon bonded to oxygen with at least one amine functional group. Optionally, the amino-siloxane compound may also include a hydrophilic group. The additive reacts with an aqueous phase and an organic phase to form a thin polyamide film on a porous substrate.

Flux enhancing agent for improving composite polyamide reverse osmosis membrane performance

The present invention provides a composite membrane comprising a porous base membrane and a polyamide coating disposed on said porous base membrane, said polyamide coating comprising a C-Ccyclic carbonyl compound and a C-Camide compound, said amide compound comprising at least one N&#x2014;H moiety. In addition the present invention provides a method of preparing a composite membrane comprising contacting under interfacial polymerization conditions an organic solution comprising a polyacid halide with an aqueous solution comprising a polyamine, said contacting being carried out on a surface of a porous base membrane, said organic solution further comprising a C-Ccyclic carbonyl compound, said aqueous solution comprising a C-Camide compound, said amide compound comprising at least one N&#x2014;H moiety.

Method of making composite membrane

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Vista, CA, United States of America

Steven John Harrold