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109 条记录 (耗时 0.013 秒)

    Manufacture of nanocellulose and intermediates thereof
    40.
    发明授权
    Manufacture of nanocellulose and intermediates thereof 有权

    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.