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| High Value-added Utilization of Cellulose: Microcrystalline Cellulose Preparation |
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| DOI：10.11980/j.issn.0254-508X.2014.05.005 |
| Key Words:microcrystalline cellulose Fe3+ selective acid hydrolysis reducing sugar |
| Fund Project:教育部高校博士点专项基金（20126125130001）；陕西科技大学博士启动基金（BJ13-02）资助；陕西科技大学创新基金资助项。 |
| Author Name | Affiliation | | 张向荣 | 陕西科技大学轻工与能源学院, 陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安,710021 | | 张美云 | 陕西科技大学轻工与能源学院, 陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安,710021 | | 李金宝 | 陕西科技大学轻工与能源学院, 陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安,710021 | | 贺 行 | 陕西科技大学轻工与能源学院, 陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安,710021 |
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| Abstract:Application of metal Fe3+ catalytic acid hydrolysis, separation and purification to prepare crude microcrystalline cellulose from dissolving pulp was introduced. The optimal dilute acid hydrolysis concentration and Fe3+ concentration were determined, and a preliminary analysis was carried out on the ingredients of hydrolysis residual liquid. The optimal hydrolysis parameters were: hydrolysis temperature 80℃, Fe3+ concentration 0.3 mol/L, hydrolysis time 60 min, and hydrochloric acid concentration 2.0 mol/L. The results showed that the main composition of MCC was cellulose with crystalline structure ofⅠtype, the crystallinity was 73.0%, which increased by 18.2 percentage points compared with raw material 54.8%,and the degree of polymerization reduced to around 100; and the weighted mean length of MCC distribution was between 200~400 μm; the yield of reducing sugar in the hydrolysis residual liquid was 1.56%. |
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