发明授权
US09382389B2 Method for separating lignin from black liquor, a lignin product, and use of a lignin product for the production of fuels or materials
有权
从黑液中分离木质素，木质素产品以及木质素产品用于生产燃料或材料的方法
- 专利标题： Method for separating lignin from black liquor, a lignin product, and use of a lignin product for the production of fuels or materials
- 专利标题（中）： 从黑液中分离木质素，木质素产品以及木质素产品用于生产燃料或材料的方法
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申请号： US12918497申请日： 2008-02-21
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公开(公告)号： US09382389B2公开(公告)日： 2016-07-05
- 发明人: Fredrik Ohman , Hans Theliander , Per Tomani , Peter Axegard
- 申请人： Fredrik Ohman , Hans Theliander , Per Tomani , Peter Axegard
- 申请人地址： SE Sundsvall
- 专利权人： Valmet Aktiebolag
- 当前专利权人： Valmet Aktiebolag
- 当前专利权人地址： SE Sundsvall
- 代理机构： FASTH LAW OFFICES
- 代理商 Rolf Fasth
- 国际申请： PCT/SE2008/000142 WO 20080221
- 国际公布： WO2009/104995 WO 20090827
- 主分类号： D21C11/00
- IPC分类号： D21C11/00 ; C08H8/00
摘要：
The method is for controlling a sodium and sulphur balance of a pulp mill while separating lignin from black liquor. Lignin is precipitated by using an acid followed by filtration. The lignin filter cake thus obtained is re-suspended in acidic liquid and dewatered to form a second cake. The filtrate obtained after dewatering of the second cake is returned for washing and suspension of the first cake. Sodium sulphate-rich ESP (electrostatic precipitator) dust produced in the recovery boiler is used in the washing of the precipitated lignin cake.
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