Method of producing dissolving pulp, dissolving pulp and use of method
S Asikainen, M Määttänen, A Harlin, K Valta… - US Patent App. 14 …, 2015 - Google Patents
(57) ABSTRACT A method of producing dissolving pulp from a recycled fibrous feedstock.
The method comprises providing a fibrous material comprising cellulose, lignin and
hemicellulose, said fibre source further having alignin content of 0.1 to 7% lignin and anash
content of up to 3%; Subjecting the fibrous material to an alkaline extraction at a temperature
of about 0 to 25 C., to produce fibres having a reduced content of hemicellulose; Subjecting
the fibres thus obtained to a bleaching treatment carried out with oxidative chemical …
The method comprises providing a fibrous material comprising cellulose, lignin and
hemicellulose, said fibre source further having alignin content of 0.1 to 7% lignin and anash
content of up to 3%; Subjecting the fibrous material to an alkaline extraction at a temperature
of about 0 to 25 C., to produce fibres having a reduced content of hemicellulose; Subjecting
the fibres thus obtained to a bleaching treatment carried out with oxidative chemical …
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