Exxon Research and Engineering Company

W S Ho

Guido Sartori

Warren A Thaler

Robert E Noone

David Craig Dalrymple

Eugene L Stogryn

Bruce Henry Ballinger

George E Milliman

Larry J Shulik

Robert P Mastondrea

David William Savage

Geoffrey R Say

Roy L Pruett

Angelo A Montagna

Gerald Doyle

Russell J Koveal

Tan Jen Chen

James P Glass, Jr

Charles P Darnell

Abraham D Cohen

George R Chludzinski

Fred J Heinzelmann

Guido Satori

Suh J Han

Noah S Rothblatt

Guido Santori

The present invention is directed toward a composition comprising a polyamine or its polymer blend and at least one salt of an aminoacid, the salt of the aminoacid being present in an amount ranging from about 10 to 80 wt % based on the total weight of the composition. Another embodiment of the present invention comprises a membrane suitable for use in separating CO.sub.2 from gas streams containing CO.sub.2, especially H.sub.2 rich gas streams containing CO.sub.2 and CO. The membrane of this invention with polyamine shows higher CO.sub.2 selectivity and permeability than the prior membrane without polyamine.

Membranes comprising aminoacid salts in polyamine polymers and blends

A new copolymer composition comprises the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polycarbonate or a mixture of an oligomeric aliphatic polycarbonate and an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high selectivity and flux for separation of an aromatic/saturate mixture.

Polymide copolymers containing polycarbonate soft segments

The present invention is directed toward a composition suitable for use in separating CO.sub.2 from gas streams containing CO.sub.2 especially H.sub.2 rich gas streams containing CO.sub.2 and CO. The composition comprises a hydrophylic polymer and at least one salt of an aminoacid, the salt of the aminoacid being present in an amount ranging from about 10 to about 80 wt % based on the total weight of the composition.

Membranes comprising salts of aminoacids in hydrophilic polymers

A gas treating composition prepared by reacting 2-amino-2-methyl-1-propanol with KOH, diluting with water and adding K.sub.2 CO.sub.3 and a vanadium corrosion inhibitor.

Primary hindered aminoacids for promoted acid gas scrubbing process

The present invention includes new polyimide/polyester copolymers without pendent carboxyl groups, a method for their synthesis, and their use as membranes for aromatics/saturates separation.

Polyimide/aliphatic polyester copolymers without pendent carboxylic acid

The present invention is a process for the recovery of normal alcohols, especially C.sub.1 -C.sub.20 n-alcohols, preferably n-C.sub.4 -C.sub.14 alcohols, most preferably n-C.sub.6 -C.sub.11 alcohols from n-paraffins by means of pervaporation through a membrane. The alcohols/paraffin feed mixture may be that produced in the Fischer-Tropsch synthesis process wherein mixtures of CO and H.sub.2 are reacted to produce paraffin waxes and a minor but still valuable amount of alcohols.

Recovery of alcohols from n-paraffins by pervaporation

The present invention describes a method for the synthesis of unsaturated aliphatic polyesters, their crosslinking by thermal treatment and the use of the corresponding crosslinked membranes to separate aromatics from saturates.

Unsaturated polyesters and crosslinked membranes therefrom for

The present invention describes a method for the synthesis of saturated aliphatic polyesters by reaction of saturated or aromatic diacid chlorides with oligomeric aliphatic polyester diols, a method to thermally crosslink membranes prepared from the above saturated aliphatic polyesters, and the use of the crosslinked membranes to separate aromatics from saturates.

Saturated polyesters and crosslinked membranes therefrom for

The present invention describes a method for separating mixtures of aromatics and non-aromatics into aromatic-enriched and non-aromatic-enriched streams by contacting the mixture with one side of a polysulfone membrane and selectively permeating the aromatic components through the membrane.

Polysulfone membranes for aromatics/saturates separation

The present invention described a method for the synthesis of saturated aliphatic polyesters by reaction of saturated or aromatic diacid chlorides with oligomeric aliphatic polyester diols, a method to thermally crosslink membranes prepared from the above saturated aliphatic polyesters, and the use of the crosslinked membranes to separate aromatics from saturates.

A new copolymer composition comprising the soft segment of an aliphatic polyester and the hard segment of a highly halogenated polyurethane containing from 3 to 36 halogen atoms is disclosed. The new halogenated polyurethane copolymer membrane has high thermal stability, and good selectivity and permeability for separation of an aromatic/saturate mixture.

Halogenated polyurethanes

A membrane is provided for separating aliphatically unsaturated hydrocarbons from hydrocarbon mixtures, the membrane comprising a hydrophilic polymer which contains metals capable of complexing with aliphatically unsaturated hydrocarbons and a hydrophilic salt of a Group I metal.

Polymeric membrane and process for separation of aliphatically

The present invention describes a method for separating mixtures of aromatics and non-aromatics by permeation through a sulfonated polysulfone membrane which is selective for aromatics.

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Annandale, NJ, United States of America

W S Ho