US Patent 7413881 Chitosan and method of preparing chitosan

Patent 7413881 was granted and assigned to Cargill on August, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Cargill

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7413881

Date of Patent

August 19, 2008

Patent Application Number

11153801

Date Filed

June 15, 2005

Patent Primary Examiner

‌

James Wilson

Patent abstract

A highly deacetylated chitosan obtained from microbial biomass, a method of obtaining chitosan from microbial biomass, and biomass for making chitosan are disclosed. The method includes providing chitin-containing biomass; reacting the chitin-containing biomass in a caustic solution of greater than 25 percent alkali at a reaction temperature greater than 95° C. for a reaction period of at least 10 hours to convert the chitin in the biomass to chitosan; and separating the chitosan from the caustic solution.