发明名称 |
A METHOD AND A SYSTEM FOR ISOLATING XYLAN FROM PLANT MATERIAL, AS WELL AS XYLAN, CALCIUM CARBONATE, AND CELLULOSE FIBRE |
摘要 |
A method and a system for preparing xylan and calcium carbonate, xylan, a cellulose fibre, and precipitated calcium carbonate. The method includes extracting xylan from cellulose fibres with sodium hydroxide to form a mixture containing cellulose fibres and an extract solution containing xylan; removing the cellulose fibres from the mixture to isolate the extract solution; adding carbon dioxide to the isolated extract solution to form a mixture containing a liquid brightener and precipitated xylan; separating the brightener from the mixture to isolate the precipitated xylan; adding calcium hydroxide to the separated brightener to form a mixture of precipitated calcium carbonate and liquid sodium hydroxide; and removing the sodium hydroxide from the mixture to isolate the calcium carbonate. |
申请公布号 |
EP2831123(A1) |
申请公布日期 |
2015.02.04 |
申请号 |
EP20130768365 |
申请日期 |
2013.03.26 |
申请人 |
UPM-KYMMENE CORPORATION;STORA ENSO OYJ |
发明人 |
KROGERUS, BJÖRN;FUHRMANN, AGNETA;LAINE, CHRISTIANE |
分类号 |
C08B37/14;A23L29/206;B01J8/02;C01D1/04;C01F11/18;D21C3/02 |
主分类号 |
C08B37/14 |
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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