发明名称 |
METHOD AND ARRANGEMENT FOR TREATING CHEMICAL PULP |
摘要 |
A method to pulp cellulosic fibrous material including: alkaline cooking cellulosic fibrous material in a continuous digester vessel to produce a pulp having a kappa number in a range of 50 to 120; washing the pulp discharged from the digester vessel; treating the washed pulp in the presence of oxygen and alkali to remove lignin; washing the oxygen-treated pulp such that the kappa number is recued by at least at least 30; separating lignin from wash filtrate generated by the washing of the oxygen-treated pulp, and using the separated wash filtrate as a washing liquid in the washing of the pulp from the digester vessel. |
申请公布号 |
US2014102648(A1) |
申请公布日期 |
2014.04.17 |
申请号 |
US201213261740 |
申请日期 |
2012.03.21 |
申请人 |
VEHMAA JANNE;ENGSTROM JOHAN;PIIRA JUSSI;ANDRITZ OY |
发明人 |
VEHMAA JANNE;ENGSTROM JOHAN;PIIRA JUSSI |
分类号 |
D21C3/24;D21C7/00 |
主分类号 |
D21C3/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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