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相关概念视频

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

487
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
487

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相关实验视频

Updated: Jul 20, 2025

Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues
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通过以N-异环为基础的深度欧性溶剂提取具有受控结构性质的素.

Kuan-Ting Lin1, Chenxi Wang1, Mond F Guo1

  • 1Voiland School of Chemical Engineering & Bioengineering, Washington State University, Richland, WA 99354.

Proceedings of the National Academy of Sciences of the United States of America
|July 31, 2023
PubMed
概括

研究人员开发了一种新型的深溶性溶剂,用于有效地从生物质中提取木质素. 这种方法可以控制素的特性,克服以前的利用障碍.

关键词:
生物能源是生物能源.深层欧特克溶剂溶剂的使用石灰纤维素的生物质.原生红素提取原生红素的提取.

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Quantitative 31P NMR Analysis of Lignins and Tannins
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相关实验视频

Last Updated: Jul 20, 2025

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科学领域:

  • 生物质的价值化 生物质的价值化
  • 绿色化学 绿色化学
  • 宏分子化学 宏分子化学

背景情况:

  • 的复杂结构阻碍了其工业利用.
  • 目前的提取方法往往会降解红素,限制其应用.
  • 需要一种方法来提取具有受控结构完整性的木质素.

研究的目的:

  • 开发一种新型的深溶性溶剂 (DES),用于高效的素提取.
  • 为了实现具有可调节结构性质的红素提取.
  • 为了使红素在各种转化过程中得到利用.

主要方法:

  • 使用一种以N-异环为基础的,由乳酸和Pyrazole (La-Py DES) 形成的深溶解剂 (DES).
  • 优化提取条件,包括温度 (90-145°C) 和DES成分.
  • 分析了提取的红素的产量,颜色,以太结合含量,基群含量和分子量.

主要成果:

  • 从小麦中获得高达93.7%的红素提取产量.
  • 对素的以太结合含量,基群含量和分子重量有明显的控制.
  • 在温和的条件下 (90-120°C) 制造出浅色的,与原生植物相似的红素 (产量高达80%).
  • 在145°C获得低多分散度的以太无结合性红素.

结论:

  • 拉皮DES为原生红素提取提供了一个新的战略.
  • 这种方法可以产生具有量身定制的结构性质的红素.
  • 促进了生物炼油厂和化学工业的素利用.