发明名称 |
METHOD OF PRODUCING DISSOLVING PULP, DISSOLVING PULP AND USE OF METHOD |
摘要 |
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 a lignin content of 0.1 to 7 % lignin and an ash content of up to 3%;subjecting the fibrour material to an alkaline extraction at a temperature of about0 to 25 º C, to produce fibres having a reduced content of hemicellulose; subjecting the fibres thus obtained to a bleaching treatment carried out with oxidative chemical reagents in order to reduce the lignin content of the fibres; and recovering the fibres thus obtained. By means of the method, dissolving pulp can be produced from recycled paper and cardboard products. |
申请公布号 |
WO2014041251(A1) |
申请公布日期 |
2014.03.20 |
申请号 |
WO2013FI50892 |
申请日期 |
2013.09.16 |
申请人 |
TEKNOLOGIAN TUTKIMUSKESKUS VTT |
发明人 |
ASIKAINEN, SARI;MAEAETTAENEN, MARJO;HARLIN, ALI;VALTA, KYOESTI;SIVONEN, EINO |
分类号 |
D21C9/00;D01F2/00;D21C5/02;D21H11/20 |
主分类号 |
D21C9/00 |
代理机构 |
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