• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Membranes >Membrane Separation of the Base-Catalyzed Depolymerization of Black Liquor Retentate for Low-Molecular-Mass Compound Production
【2h】

Membrane Separation of the Base-Catalyzed Depolymerization of Black Liquor Retentate for Low-Molecular-Mass Compound Production

机译：膜分离黑液保留物的碱催化解聚反应用于低分子质量化合物的生产

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

One way of valorizing the lignin waste stream from the pulp and paper industries is depolymerizing it into low-molecular-mass compounds (LMMC). However, a common problem in the depolymerization of Kraft lignin is the low yields of small aromatic molecules obtained. In the present work, the combination of the repeated depolymerization of lignin and the separation of LMMC from depolymerized lignin to upgrade them into value-added chemicals was studied. In so doing, we investigated the possibility of depolymerizing black liquor retentate (BLR). The base-catalyzed depolymerization of BLR was performed using a continuous flow reactor at 170–210 °C, with a 2 min residence time. The results obtained indicate that BLR can be depolymerized effectively under the experimental conditions. Depolymerized lignin LMMC can be successfully separated by a GR95PP membrane, and thus be protected from repolymerization. Through combining membrane filtration with base-catalyzed depolymerization, more than half of the lignin could be depolymerized into LMMC. Around 46 mg/g of lignin monomers (guaiacol, vanillin, acetovanillone, and acetosyringone), which can potentially be upgraded to high-valued chemicals, were produced. On the basis of our results, we suggest use of a recycling Kraft lignin depolymerization and filtration process for maximizing the production of LMMC under mild alkaline conditions.
机译：使纸浆和造纸工业中的木质素废料流增值的一种方法是将其解聚为低分子量化合物（LMMC）。然而，硫酸盐木质素解聚中的普遍问题是所获得的小芳族分子的产率低。在目前的工作中，研究了木质素的重复解聚和从解聚的木质素中分离LMMC以将其升级为增值化学品的组合。通过这样做，我们研究了黑液保留液（BLR）解聚的可能性。 BLR的碱催化解聚反应是使用连续流动反应器在170–210°C下进行的，停留时间为2分钟。获得的结果表明，在实验条件下BLR可以有效地解聚。解聚的木质素LMMC可以通过GR95PP膜成功分离，因此可以防止其再聚合。通过将膜过滤与碱催化解聚相结合，可以将超过一半的木质素解聚为LMMC。生产了约46 mg / g的木质素单体（愈创木酚，香兰素，乙酰香草醛和乙酰丁香酮），可以将其升级为高价值的化学品。根据我们的结果，我们建议使用可回收的硫酸盐木质素解聚和过滤工艺，以在弱碱性条件下最大限度地提高LMMC的产量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号