发明公开
- 专利标题: VERFAHREN ZUM DELIGNIFIZIEREN LIGNOCELLULOSISCHER ROHSTOFFE
- 专利标题(英): Method for delignifying lignocellulosic raw materials
- 专利标题(中): 方法脱木素木质纤维商品
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申请号: EP02762312.3申请日: 2002-07-01
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公开(公告)号: EP1399620A2公开(公告)日: 2004-03-24
- 发明人: PATT, Rudolf , KORDSACHIA, Othar , ROSE, Björn
- 申请人: Voith Paper Fiber Systems GmbH & Co. KG
- 申请人地址: Escher-Wyss-Strasse 25 88212 Ravensburg DE
- 专利权人: Voith Paper Fiber Systems GmbH & Co. KG
- 当前专利权人: Voith Paper Fiber Systems GmbH & Co. KG
- 当前专利权人地址: Escher-Wyss-Strasse 25 88212 Ravensburg DE
- 代理机构: Patentanwälte Wenzel & Kalkoff
- 优先权: DE10131028 20010629
- 国际公布: WO2003002813 20030109
- 主分类号: D21C3/06
- IPC分类号: D21C3/06
摘要:
The invention relates to a method for delignifying lignocellulosic raw materials by using sulfites in the presence of an alkaline component, especially sodium hydroxide or sodium carbonate or a mixture thereof in an aqueous solution at a high temperature and high pressure. The invention is characterized in that a first partial fragment of the alkaline component is added when the aqueous solution starts to decompose and in that at least a second partial fragment of the alkaline component is added only when delignification begins.
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