发明名称 |
Method in connection with impregnation and digestion of lignocellulosic material |
摘要 |
A method for impregnation and chemical digestion of lignocellulosic material and recovery of pulping liquors. A spent impregnating or cooking liquor is withdrawn and sulphurous compounds are recovered therefrom in a partial oxidation reactor. These sulphurous compounds are converted into hot liquid elemental sulphur which thereafter is mixed with a hot sulphide containing liquor to provide a polysulphide liquor with a concentration greater than 10 g/l and which is essentially free from thiosulphate. This polysulphide liquor is used for carbohydrate stabilising impregnation and/or for cooking at a relatively low temperature. <IMAGE>
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申请公布号 |
EP0903436(A2) |
申请公布日期 |
1999.03.24 |
申请号 |
EP19970203636 |
申请日期 |
1997.11.20 |
申请人 |
KVAERNER PULPING AB |
发明人 |
STIGSSON, LARS;LINDSTROEM, MIKAEL |
分类号 |
D21C1/06;D21C3/02;D21C3/22;D21C11/06;D21C11/12;(IPC1-7):D21C1/06 |
主分类号 |
D21C1/06 |
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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