Other

Eastman-kodak Company

Eddie Joseph Eckart

Michael E Burns

Robert Richard Dykstra

Jeffrey Scott Dupont

Shane Kipley Kirk

Kevin John Fontenot

George Chester Zima

Victor H Agreda

Bhaskar Krishna Arumugam

Robert Lee Eagan

Thomas Hugh Williams

Tim J Frederick

Gary Paul Lutz

Jarvey Eugene Felty, Jr

J Adrian Hawkins

Tony Lee Sander

Jeffrey William Green

Dimmick Lee Bymaster

The invention relates to a process for purifying and decolorizing a phenyl ester salt. The process combines a phenyl ester salt with a solvent to form a mixture and then stirs the mixture to form a slurry. The phenyl ester salt is substantially insoluble in this solvent. The process then collects the phenyl ester salt from the slurry. The collected phenyl ester salt may then be optionally dried or recrystallized. The collected phenyl ester salt is dissolved in a solvent to form a solution. The solution is decolorized and then spray dried to form a powder of the phenyl ester salt. As a result of the process the phenyl ester salt powder has a higher purity and an improved color as compared to the starting phenyl ester salt.

Purification of phenyl ester salts

Disclosed is a process for removing the Lewis acid catalyst, polymerization solvent and byproducts, such as ketals, from a polyetherketone comprising

Process for preparation of a polyetherketone

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Batesville, AR, United States of America

Eddie Joseph Eckart