Isolation and purification of concentrated and non-concentrated hemicellulose alkaline extracts
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- 作者：Felipe F. Silvaa ; felipe.silva@tecnico.ulisboa.pt" class="auth_mail" title="E-mail the corresponding author ; Ana Maria Brites Alvesa ; Maria de Lurdes Serranob ; Antó ; nio P. Mendes de Sousac
- 关键词：Hemicellulose ; Ultrafiltration ; Precipitation ; Xylans ; Eucalyptus globulus
- 刊名：Separation and Purification Technology
- 出版年：2017
- 出版时间：1 February 2017
- 年：2017
- 卷：173
- 期：Complete
- 页码：233-239
- 全文大小：563 K
文摘
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Xylans are extracted from bleached pulp, with NaOH, to give an alkaline extract.
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Isolation of xylans from alkaline extract is made by precipitation with HNO3.
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Precipitates are washed either with methanol or water for purification.
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High purity xylans (by FTIR) are obtained for acid precipitation and water washing.
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The isolated xylans had molecular weights between 24,100 and 31,000 Da.