| 杨木高温预水解工艺初探 |
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| 引用本文： | 段超,冯文英,张艳玲.杨木高温预水解工艺初探[J].纸和造纸,2012(8):33-36. |
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| 作者姓名： | 段超 冯文英 张艳玲 |
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| 作者单位： | 中国制浆造纸研究院;华博企联技术咨询有限公司 |
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| 基金项目： | “十二五”国家科技支撑计划项目(2011BAC11B02) |
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| 摘 要： | 研究杨木在不同条件下的高温预水解反应,探讨预水解温度、保温时间、液比及预水解因子(P因子)等对预水解的影响。研究结果表明:随着反应温度、保温时间及液比增大,预水解后杨木得率降低,预水解液(PHL)的pH值降低,固形物含量、酸溶木素含量和聚戊糖提取率升高,预水解温度过高(≥180℃),易发生木素或LCC吸附、沉积现象,不利于半纤维素的提取;P因子能较好地控制预水解反应,且相同的P因子条件下,所得预水解后的木片及PHL相关结果相近。通过P因子优化实验,得到杨木高温预水解的优选工艺条件为:预水解温度170℃,保温时间60min,相应的P因子约764h,液比5:1。
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| 关 键 词： | 杨木 高温预水解 P因子 聚戊糖提取率 |
Study on Hot Water Pre-Hydrolysis Process of Triploid Poplar |
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| DUAN Chao,FENG Wen-ying,ZHANG Yan-ling.Study on Hot Water Pre-Hydrolysis Process of Triploid Poplar[J].Paper and Paper Making,2012(8):33-36. |
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| Authors: | DUAN Chao FENG Wen-ying ZHANG Yan-ling |
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| Affiliation: | 1.China National Pulp and Paper Research Institute,Beijing,100102 China;2.Karpo Technology Consulting Limited Company,Beijing,100020 China) |
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| Abstract: | The process of hot water pre-hydrolysis for triploid poplar at different temperature,holding time,liquor to wood ratios and P-factor were investigated.The results indicated that with the reaction temperature,time and liquor ratio increase,the yield of treated poplar and pH value of pre-hydrolysis liquor(PHL) decreased,while the solids content,acid soluble lignin content and extraction efficiency of pentosan increased.However,the undesired adsorption and deposition of lignin/LCC occurred when the temperature was higher than 180 ℃.The pre-hydrolysis process can be well controlled by the P-factor demonstrating similar relevant results of the treated wood and PHL under the same P-factor.In this experiment,the optimized conditions of pre-hydrolysis process were:maximum temperature 170 ℃,holding time 60 min,relative P-factor 764 hrs and liquor ratio 5:1. |
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| Keywords: | triploid poplar hot water pre-hydrolysis P-factor extraction efficiency of pentosan |
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