Liquefying Lignins: Determining Phase-Transition Temperatures in the Presence of Aqueous Organic Solvents
Liquefying Lignins: Determining Phase-Transition Temperatures in the Presence of Aqueous Organic Solvents
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液化木质素:测定水性有机溶剂存在下的相变温度
DOI:
10.1021/acs.iecr.1c02044
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发表时间:
2021
影响因子:
4.2
通讯作者:
Thies, Mark C.
中科院分区:
文献类型:
--
作者:
Tindall, Graham W.;Temples, Spencer C.;Cooper, Mikhala;Bécsy-Jakab, Villő Enikő;Hodge, David B.;Nejad, Mojgan;Thies, Mark C.
Under appropriate conditions of temperature and solvent composition, single-phase aqueous organic solvents are capable of liquefying lignin to form a lignin-rich liquid phase separate from the solvent phase, creating liquid–liquid equilibrium. The extent to which this phenomenon occurs when Kraft lignin is combined with the solvents methanol, ethanol, isopropanol, and acetone was determined, with solid–liquid (SL) to liquid–liquid (LL) phase-transition temperatures being measured over the range of applicable organic–water compositions. Lignins tested from a variety of biomass sources were all discovered to form this liquid–liquid equilibrium with aqueous ethanol solutions. The formation of such phase behavior between lignin and economical, green solvents creates new opportunities for the large-scale purification and fractionation of raw bulk (i.e., technical) lignins.
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