Eastman Chemical Company

Other

Eastman-kodak Company

Thomas Hugh Williams

George Chester Zima

Gary Paul Lutz

Robert Richard Dykstra

Michael E Burns

Jeffrey Scott Dupont

Shane Kipley Kirk

Kevin John Fontenot

Bhaskar Krishna Arumugam

Robert Lee Eagan

David Martin Hitch

Jerry Lynn Miller

Jarvey Eugene Felty, Jr

Eddie Joseph Eckart

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

According to the invention, waste materials containing amido-carboxylic acid esters, which are generated during the preparation of phenyl ester salts, can be converted into amido-carboxylic acids. The recovered amido-carboxylic acid is then useful in the preparation of additional phenyl ester salt by the original preparation process or other processes known in the art. The process of the invention combines a waste material containing amido-carboxylic acid esters with an aqueous solution of a strong acid having a pH less than about 1 to form a mixture. The process heats the mixture to a temperature of at least 90&deg; C. and maintains the mixture at that temperature for a time sufficient to hydrolyze the amido-carboxylic acid esters to amido-carboxylic acids. Sufficient base is the added to adjust the pH of the mixture to greater than about 2. The mixture is then maintained at a temperature of at least 80&deg; C. for a time sufficient to allow phase separation of the aqueous and organic phases within the mixture. The organic phase and the aqueous phase are then separated and the amido-carboxylic acids recovered from the organic phase.

Process for recycling amido-carboxylic acid esters into amino-carboxylic acids

The present invention relates to a one-step process for preparing amido-carboxylic acid esters having the amide nitrogen positioned between two carbonyl carbons by reacting a carboxylic acid or carboxylic acid ester with a monohydric alcohol and either a lactam, amino-carboxylic acid or a polymeric amino-carboxylic acid. In this process, amidation, esterification, alcoholysis, and hydrolysis reactions occur simultaneously.

Process for preparing amido-carboxylic acid esters having internal amide

Disclosed is a method for treating asbestos to minimize the formation of airborne particulate of asbestos by applying to the asbestos an aqueous composition containing certain water-dispersible polymers. The method is especially useful when used in conjunction with the removal of asbestos from asbestos-coated objects.

Method for controlling asbestos dust

A method for treating fiber insulation to minimize the formation of dust and airborne particulate and waterproofing calcium silicate by applying to the insulation an aqueous composition containing certain water-dispersible polymers. The method is especially useful when used in conjunction with the removal of installed insulation.

Method for treating inorganic fiber insulation to minimize dust and

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Fall Branch, TN, United States of America

Thomas Hugh Williams