US Patent 9297111 Methods for the manufacture of cellulose nanocrystals

Patent 9297111 was granted and assigned to Domtar on March, 2016 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Patent Applicant

Domtar

Current Assignee

Domtar

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

9297111

Date of Patent

March 29, 2016

Patent Application Number

14208759

Date Filed

March 13, 2014

Patent Primary Examiner

‌

Anthony Calandra

Patent abstract

Embodiments of the present invention relates generally to methods and systems for the manufacture of cellulose nanocrystals. In one embodiment, a method for manufacturing cellulose nanocrystals comprises reacting lignocellulosic fibers with sulfuric acid in water, introducing a water-insoluble solvent to substantially terminate the reaction, separating a first stream comprising at least 70% of the unreacted sulfuric acid in the water-insoluble solvent from a second stream comprising a plurality of cellulose nanocrystals and the remainder of the unreacted sulfuric acid in water, and separating the cellulose nanocrystals from the second stream.