Union Carbide Corporation

Union Carbide Chemicals & Plastics Technology Corporation

Union Carbide Chemicals and Plastics Company, Inc.

Bernard C Ream

Stephen W King

Louis A Kapicak

Joseph P Henry

Kurt Damar Olson

Hwaili Soo

Arthur R Doumaux, Jr

John H Robson

Cyril B Tellis

James R Nelson

John W Crandall

Charles Henry McMullen

Joseph Alton Sims, Jr

John M Hurt

James E Deitzler

Thomas C Cleveland

A process for preparing nitrogen-containing compounds which comprises contacting a carboxylated N-monosubstituted nitrogen-containing compound or a carboxylated N,N-disubstituted nitrogen-containing compound with a mixed metal oxide catalyst under conditions effective to produce the nitrogen-containing compound.

Processes for the preparation of carbamates

A decarboxylation process which comprises contacting a carboxylated compound with a metal oxide catalyst under conditions effective to decarboxylate the carboxylated compound.

Decarboxylation processes using mixed metal oxide catalysts

A process for the catalytic hydrolysis of alkylene oxide to alkylene glycol using a hydrothermally stable, mixed metal framework catalyst composition selected from

Mixed metal framework compositions for monoalkylene glycol production

Cyclic alkylene carbonates are produced by the homogeneous catalytic reaction of alkylene oxides with carbon dioxide during which process, polyglycols are formed. The catalyst is separated by distillation from the alkylene carbonate and is recycled to the reaction while associated with polyglycols. A purge stream is removed from the recycle to prevent an undue concentration of polyglycols in the reaction and catalyst is separated from the purge stream by acylation of the polyglycols enabling precipitation of the catalyst.

Process for the production of alkylene carbonate and recovery of catalyst

Cyclic alkylene carbonates are produced by the homogeneous catalytic reaction of alkylene oxides with carbon dioxide during which process, polyglycols are formed. The catalyst is separated by distallation from the alkylene carbonate and is recycled to the reaction while associated with polyglycols. A purge stream is removed from the recycle to prevent an undue concentration of polyglycols in the reaction and catalyst is separated from the purge stream by acylation of the polyglycols enabling precipitation of the catalyst.

Process for the production of alkylene carbonate

A process is described for recovering polyester-grade ethylene glycol from crude ethylene glycol containing at least one component which has a normal boiling point below that of ethylene glycol, and which can form a UV absorber in the presence of ethylene glycol which comprises supplying to an ethylene glycol distillation system, preferably comprising a fractional distillation zone having an upper portion, a lower portion and an intermediate portion a crude ethylene glycol stream at a determined pH of less than about 7.5; maintaining within the intermediate portion of the fractional distillation zone a diluent having a boiling point below that of the at least one component, such as methanol, at a concentration sufficient to reduce the formation of UV absorber in the intermediate portion wherein at least ethylene glycol, the at least one component and the diluent, are present, and withdrawing ethylene glycol substantially free of the at least one component from the lower portion of the fractional distillation zone.

Process for refining ethylene glycol

A continuous vapor state process for the preparation of diesters of oxalic acid from a nitrogen oxide, an alcohol and carbon monoxide.

Vapor state formation of diesters of oxalic acid

A process for the removal of acid gases which are reactive with ethylene oxide from a gas mixture containing carbon dioxide, comprises contacting the gas mixture with ethylene carbonate containing sufficient amount of ethylene oxide, whereby the ethylene oxide reacts chemically with the acid gases to produce reaction products which are more easily removable from the gas mixture.

Process for the removal of acid gases from a gas mixture

A process is disclosed for preparing a diester of oxalic acid by contacting carbon monoxide and an ester of nitrous acid in the vapor state under a pressure in the presence of a supported palladium monolith catalyst.

Process for preparing a diester of oxalic acid

A process for making alkylene carbonate by the reaction of carbon dioxide and an alkylene oxide of the formula ##STR1## wherein R, R.sub.1, R.sub.2 and R.sub.3 are one or more of hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, allyloxy, chloroalkyl, and aryloxy to produce the corresponding carbonate, which comprises:

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Charleston, WV, United States of America

Bernard C Ream