发明名称 |
A process and apparatus for modification of lignocellulosic materials and products of modified lignocellulosic materials obtained by the process |
摘要 |
<p>A process and apparatus for the preparation of a modified lignocellulosic material by - treating the lignocellulosic material in a first activator zone having an atmosphere of one or more acid anhydrides in vapour form in a gas at a gauge pressure of 0 50 kPag and a temperature of 100 160 °C, and then - treating the lignocellulosic material in a second reactor zone having an atmosphere of a gas at a gauge pressure of 0 50 kPag and a temperature of 120 190 °C, thereafter - stripping the lignocellulosic material with steam or water in a stripper zone, and - optionally further processing. The process is more efficient as compared with the prior art processes by providing a better access of the acid anhydrides to the sites of the reactive lignocellulosic hydroxyl groups (-OH), which are located on the internal surfaces of pores and capillary channels in the lignocellulose. Furthermore, the apparatus is relatively simple. This makes the inventive process and apparatus suitable for a cost-efficient preparation of modified lignocellulosic fibre in industrial scale.</p> |
申请公布号 |
AU2011355330(A1) |
申请公布日期 |
2013.07.18 |
申请号 |
AU20110355330 |
申请日期 |
2011.01.10 |
申请人 |
DANISH PLANT FIBRE TECHNOLOGIES HOLDING A/S |
发明人 |
ERIKSEN, PER BERRE;LARSEN, PETER;KYHN, ESKILD |
分类号 |
C08H8/00;B27K5/00;B27N1/00 |
主分类号 |
C08H8/00 |
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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