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PATENT

MANUFACTURE OF NANOCELLULOSE AND INTERMEDIATES THEREOF USING OXALIC ACID DIHYDRATE

The present invention relates to a method for manufacturing nanocellulose comprising the steps of: a) providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt.% water, b) contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates, c) washing the mixture, d) preparing a suspension comprising the washed material from step c) and e) recovering nanocellulose from the suspension. The present invention relates also to a method of manufacturing nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, simple, and direct. Pulp can be used as raw material. A considerable amount of free carboxyl groups are introduced. A high yield can be obtained. The methods are inexpensive.


» Number: CA3008365A1 (A1)

» Publication Date: 17//2/22/0

» Applicant: FINECELL SWEDEN AB?[SE]

» Inventor: LI DONGFANG?[SE]; HENSCHEN JONATAN?[SE] (1)

» More Information

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n [310187].