Abstract: Chlorine-resistant semipermeable membranes which comprise an interfacial polymerization reaction product composited on a porous backing support material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of triaryl triamine. The coated support material is then contacted with an organic solvent solution of an aromatic polycarboxylic acid chloride for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water, the membrane resistant to attack by chlorine which is present in the water.

Abstract: Facilitated gas enrichment membrane composites which are utilized in the separation of gases or gas enrichment of a gas mixture will comprise an organometallic compound which acts as a gas carrier interdispersed in an interpenetrating polymer network matrix. The network matrix which comprises the reaction product of an isocyanate-capped polymer physically entwined with a nitrogen-containing compound will be nonacidic and hydrophobic in nature.

Abstract: A broad class of polymers which mimic the NAD--NADH.sub.2 couple is disclosed. These polymeric pseudohydrogenases may be used to asymmetrically reduce many types of carbonyl, thiocarbonyl, and imino groups in either a batch or continuous process, with the absolute configuration of the resulting optically active product predictable from the known absolute configuration of the chiral polymer.

Abstract: A broad class of polymers which mimic the NAD-NADHCN couple is disclosed. These polymeric pseudocyanotransferases may be used to effect asymmetric hydrocyanation of many types of carbonyl, thiocarbonyl, and imino groups in either a batch or continuous process, with the absolute configuration of the resulting optically active product predictable from the known absolute configuration of the chiral polymer.

Abstract: Semipermeable composite membranes which comprise an interpenetrating polymer network of the reaction product of a polyether and an isocyanate with a heterocyclic nitrogen-containing compound composited on a porous backing support material may be used in separation systems such as reverse osmosis, ultrafiltration, gas separation, dialysis, etc. The membranes of the present invention will permit the separation process to be efficient in an effective manner.

Abstract: The separation of mono- or disaccharides such as glucose or maltose from polysaccharides such as starch may be effected by passing a mixture of these saccharides through an ultra-filtration membrane whereby the glucose or maltose is separated from the starch. The ultra-filtration membranes which are employed for this purpose will comprise a cross-linked polyurethane composited on a support. As an example of the type of membrane which may be employed, an amine-modified polyepihalohydrin such as epichlorohydrin which has been cross-linked with toluene diisocyanate is composited on a polysulfone. This type of ultra-filtration membrane will permit the use of a relatively high flux with a good separation efficiency.