发明授权
US06939439B1 Batch process for producing chemical pulp by removing and reintroducing calcium-containing spent liquor in the digester
失效
通过在蒸煮器中除去并重新引入含钙废液来生产化学纸浆的分批方法
- 专利标题： Batch process for producing chemical pulp by removing and reintroducing calcium-containing spent liquor in the digester
- 专利标题（中）： 通过在蒸煮器中除去并重新引入含钙废液来生产化学纸浆的分批方法
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申请号： US10089022申请日： 2000-10-04
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公开(公告)号： US06939439B1公开(公告)日： 2005-09-06
- 发明人: Asko Paakki , Päivi Uusitalo , Mikael Svedman
- 申请人： Asko Paakki , Päivi Uusitalo , Mikael Svedman
- 申请人地址： FI
- 专利权人： Metso Chemical Pulping Oy
- 当前专利权人： Metso Chemical Pulping Oy
- 当前专利权人地址： FI
- 代理机构： Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- 优先权： FI19992132 19991004
- 国际申请： PCT/FI00/00855 WO 20001004
- 国际公布： WO01/25531 WO 20010412
- 主分类号： D21C3/02
- IPC分类号： D21C3/02 ; D21C1/00 ; D21C3/22 ; D21C11/10 ; D21C11/00
摘要：
Methods for producing chemical pulp from lignocellulose-containing material in processes for kraft pulp production are disclosed including charging the lignocellulose-containing material to a digester, initially treating the lignocellulose-containing material with an impregnation liquor, and then treating the impregnated lignocellulose-containing material with hot liquor and displacing calcium-containing spent liquor from the digester during that treatment, heating and cooking the heated lignocellulose-containing material to produce cooked lignocellulose-containing material and cooking liquor and displacing the cooking liquor from the digester using at least a portion of the displaced calcium-containing spent liquor.