Texaco Inc.

Mordechai Pasternak

John Reale, Jr

Craig R Bartels

Tansukhlal G Dorawala

Abraham Morduchowitz

Uygur Kokturk

Mitri S Najjar

Richard F Beaupre

Vatsal M Shah

Raymond D Malouf

Michael T Stephenson

The surface of a polymer such as polypropylene, may be treated by contact with an amine donor such as ethylene diamine followed by irradiation with ultraviolet light of wave length of about 1800.ANG.-2800.ANG. to improve surface wettability.

Polymer treating process

Photooxidation of cyclohexene or tetralin is effected preferably in the presence of a photosensitizer such as an aliphatic ketone by light of wave length of about 2000 .ANG.-7000 .ANG. to form hydroperoxide, alcohol, and ketone products in good photoconversion yield and selectivity.

Photooxidation of hydrocarbons

A charge containing dewaxed oil/dewaxing solvent may be treated to effect separation of components by a thermally cross-linked hydrocarbon-derived elastomer membrane, typified by polybutadiene.

Membrane process for separating a mixture containing dewaxed oil and

Mixtures containing methanol and dimethyl carbonate or methanol and methyl t-butyl ether may be treated by pervaporation to recover product containing decreased quantity of methanol.

Separation of organic liquids

Dewaxed oil containing dewaxing solvent from solvent dewaxing is treated by contact with a separating elastomer membrane to yield a retentate containing increased content of dewaxed oil and decreased content of dewaxing solvent and a permeate which contains increased content of dewaxing solvent and decreased content of dewaxed oil--the membrane including a barrier layer of an adduct of maleic acid anhydride and a poly(aliphatic terpene) which has been thermally cross-linked.

Membrane process for treating a charge containing dewaxing solvent and

Charge aqueous solution containing 85 w % ethylene glycol is concentrated by pervaporation across a sulfonated polyethylene membrane to yield retentate containing 95 w % ethylene glycol.

Dewatering of concentrated aqueous solutions by pervaporation

Charge compositions containing aqueous mixtures of organic nitrogen compounds may be separated by pervaporation through a membrane assembly containing a porous ceramic support bearing as separating layer, polyvinyl alcohol which has been cross-linked as with glutaraldehyde.

Membrane and method of separation

Aqueous solutions of organic oxygenates, typified by concentrated aqueous solutions of ethanol or isopropanol, are dewatered by pervaporation through a polyimine membrane which has been interfacially cross-linked with a polyisocyanate or a poly(carbonyl chloride).

Membrane separation process

Charge containing dewaxed oil and dewaxing solvent (typically methyl ethyl ketone and toluene) is treated to separate dewaxing solvent by use of a separating membrane barrier of a polyurea.

Process for treating a mixture containing dewaxed oil and dewaxing

Charge compositions containing aqueous mixtures of organic oxygenates may be separated by pervaporation through a membrane assembly containing a porous ceramic support bearing as separating layer, a membrane of cured polyvinyl alcohol which has been cross-linked as with glutaraldehyde.

Novel membrane and method of separation

A solution of isopropanol or ethanol is concentrated by pervaporation across a membrane of polyurea polymer or polyamide polymer prepared by interfacial polymerization of (i) an amine monomer containing at least two primary or secondary amine nitrogens and (ii) an isocyanate monomer containing at least two --NCO groups or a carbonyl chloride monomer containing at least two --COCl groups.

Membrane separation method

Charge containing dewaxed oil and dewaxing solvent (typically methyl ethyl ketone and toluene) is treated to separate dewaxing solvent by use of a separating elastomer membrane barrier of a polysiloxane which has been cross-linked as with toluene diisocyanate, adipoyl dichloride, a dialkoxy silane, or a diacetoxy silane.

Membrane process for treating a mixture containing dewaxed oil and

Desalination of water is effected by use of a polyimine membrane which has been cross-linked with a combination of aliphatic and aromatic polyisocyanate or with a polycarbonyl chloride cross-linking agent.

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Spring Valley, NY, United States of America

Mordechai Pasternak