The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2003
Filed:
Feb. 10, 2000
Charles M. Buchanan, Kingsport, TN (US);
Norma L. Buchanan, Kingsport, TN (US);
John S. Debenham, Kingsport, TN (US);
Michael C. Shelton, Kingsport, TN (US);
Matthew D. Wood, Gray, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
The invention provides a method of obtaining a cellulose material from corn fiber wherein the method comprises the steps of: (a) heating a 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 first liquid comprising arabinoxylan; (e) separating the insoluble cellulose material from the first liquid comprising arabinoxylan at a temperature of at or above about 60° C.; and (f) rinsing the insoluble cellulose material to remove essentially all alkali, thereby providing a cellulose material having a cellulose content of at least about 50% and consisting essentially of cellulose I. Cellulose esters and ethers are also prepared from the derivatizable cellulose prepared according to the methods herein.