公开(公告)号：US11174324B2

公开(公告)日：2021-11-16

申请号：US16621833

申请日：2018-06-18

申请人： FINECELL SWEDEN AB

发明人： Dongfang Li ,  Jonatan Henschen ,  Monica Ek

IPC分类号： C08B15/02 ,  C08B3/12 ,  C08B3/22 ,  B82Y40/00

摘要： The present invention relates to a method for manufacturing hydrophobized 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 material from step c) and e) recovering hydrophobized nanocellulose from the suspension. The present invention relates also to a method of manufacturing hydrophobized nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, inexpensive, simple, and direct. Pulp can be used as raw material.

公开(公告)号：US11084885B2

公开(公告)日：2021-08-10

申请号：US16003176

申请日：2018-06-08

申请人： FineCell Sweden AB

发明人： Dongfang Li ,  Jonatan Henschen ,  Monica Ek

IPC分类号： C08B3/24 ,  C08L1/10 ,  D21C9/00 ,  D21H11/18 ,  C08L1/12 ,  C08B3/06 ,  C08K5/11 ,  C08B3/00 ,  B29C48/00

摘要： 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.