Eastman Chemical Company

Grupo Petrotemex S.a. De C.v.

Larry Wayne Blair

Elaine Beatrice Mackenzie

Scott Donald Barnicki

Robert Thomas Hembre

Shane Kipley Kirk

Sumit Chakraborty

Bhaskar Krishna Arumugam

Michael Richard Laningham

Joy Lynn Laningham

Venkateswarlu Bhamidi

Guoxiong Hua

John Derek Woollins

Kenny Randolph Parker

Steven Thomas Perri

Charles Michael Buchanan

Joseph Robert Zoeller

Norma Lindsey Buchanan

Nick Allen Collins

Matthew Davie Wood

Michael Charles Shelton

Chester Wayne Sink

John Steele Debenham

Brendan William Boyd

Michael Visneski

David Anthony Larkin

John K Sanders

Larry R Lingerfelt, Jr

The present invention relates to a method for the manufacture of cyclododecasulfur, a cyclic sulfur allotrope wherein the number of sulfur (S) atoms in the allotrope's homocyclic ring is 12. The method includes reacting a metallasulfur derivative with an oxidizing agent in a reaction zone to form a cyclododecasulfur-containing reaction mixture.

Method for the manufacture of cyclododecasulfur

The process relates improving terephthalic acid purge filtration rate by controlling % water in filter feed slurry and to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid, while utilizing pressure filtration.

Terephthalic acid purge filtration rate by controlling % water in filter feed slurry

Disclosed is a process wherein a solution of a carboxylic acid in a first solvent and an alcohol are fed to a simulated moving bed reactor (SMBR) containing a solid(s) to produce a first stream comprising a solution of an ester of the carboxylic acid and the alcohol and a second stream comprising the first solvent. The solid(s) present in the SMBR facilitates the esterification reaction and the separation of the first solvent from the carboxylic acid. The process is particularly valuable for the preparation of an alkanol solution of an alkyl 2-keto-L-gulonate ester (AKLG) from an aqueous fermentation broth containing dissolved 2-keto-L-gulonic acid (KLG) by feeding the fermentation broth and an alkanol to a simulated moving bed reactor which contains a solid acidic esterification catalyst to produce a stream comprising an alkanol solution of an ALKG. The alkanol solution of an ALKG may be used directly to convert the ALKG to ascorbic acid (Vitamin C).

Preparation of esters of carboxylic acids

The present invention is a process for the preparation of ascorbic acid using a simulated moving bed (SMB) reactor system to accomplish the simultaneous conversion of KLG or a derivative of KLG to ascorbic acid and the separation of reaction products. The SMB reactor contains a solid or mixture of solids effective for catalyzing the reaction of KLG or its derivative and for separating the reactions products by selective adsorption of at least one product. In a general embodiment, this process involves (1) feeding a solution of KLG or a derivative thereof in a first solvent and a desorbent which is miscible with the first solvent, to a simulated moving bed reactor; (2) reacting the KLG or the KLG derivative to form ascorbic acid; and (3) removing from the simulated moving bed reactor (i) a first liquid stream comprising a solution of ascorbic acid in the desorbent and the first solvent (ii) a second liquid stream comprising the first solvent and the desorbent.

Process for the preparation of ascorbic acid

In one aspect, the invention provides methods of obtaining at least one monosaccharide from corn fiber the method comprises the steps of: (a) heating an aqueous mixture of corn fiber and a liquid; (b) contacting the mixture of step (a) with a protease enzyme, thereby providing a proteolyzed corn fiber and a liquid; (c) separating the liquid from the proteolyzed corn fiber; (d) contacting the proteolyzed corn fiber at least once with an alkaline extractant, thereby providing an insoluble cellulose material and a liquid comprising arabinoxylan; (e) separating the insoluble cellulose material from the liquid comprising arabinoxylan; (f) reducing the volume of the liquid comprising arabinoxylan by removing excess alkaline extractant, thereby providing a concentrated liquid comprising from about 10 to about 50% solids, wherein the solids comprise arabinoxylan; and (g) hydrolyzing the arabinoxylan from step (f) in the presence of a catalyst and a solvent, thereby providing a mixture comprising at least one monosaccharide. In a further aspect, the invention pertains to methods of separating the monosaccharides obtained from corn fiber according to the methods disclosed herein.

Corn fiber for the production of advanced chemicals and materials: separation of monosaccharides and methods thereof

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Gate City, VA, United States of America

Larry Wayne Blair