Technion Research & Development Foundation Ltd

Fresenius Medical Care Holdings, Inc.

Moris S Eisen

Claudia Averbuj

Edith Tish

Victoria Volkis

Michal Shmulinson

Raphael Semiat

Natalia Vainrot

The invention provides modified polysulfones substituted in one or more of the phenyl rings by functional groups and membranes composed of the modified polysulfones. Also provided are methods for the preparation of monodispersed nanoporous polymeric membranes. The membranes are useful for reverse osmosis, nanofiltration, and ultrafiltration, particularly for purification of water.

Polysulfone polymers and membranes for reverse osmosis, nanofiltration and ultrafiltration

A sorbent polymer is provided that interacts or reacts with aqueous urea to aid the regeneration of a dialysate liquid. The sorbent polymer may include one or more specific functional groups bonded thereto. Such specific functional groups are selected from carboxylic acids, carboxylic acid esters, carboxylates, amides, dicarboxylic acids, dicarboxylic acid esters, and dicer boxylates to produce the desired urea sorbent.

Urea sorbent

A process for the polymerization of one or more alpha-olefins having at least 3 carbon atoms, which comprises contacting the monomer or monomers in a polar or non-polar solvent under polymerization conditions with a homogeneous catalyst system including (a) a cationic form of a racemic mixture of a chiral octahedral transition metal complex or of a non chiral octahedral transition metal complex, comprising 1, 2 or 3 bidentate chelating ligands and no cyclopentadienyl ligands and having C , C , or C symmetry; and (b) an anion of a Lewis acid or a Br&ouml;nsted acid; and adjusting the pressure so as to obtain either a highly stereoregular polymer or copolymer or an elastomer.

Process for the production of stereoregular polymers and elastomers of alpha-olefins and certain novel catalysts therefor

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Kyrat, Israel

Moris S Eisen