发明公开
EP1399620A2 VERFAHREN ZUM DELIGNIFIZIEREN LIGNOCELLULOSISCHER ROHSTOFFE 审中-公开
方法脱木素木质纤维商品

VERFAHREN ZUM DELIGNIFIZIEREN LIGNOCELLULOSISCHER ROHSTOFFE
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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