Liquid–Liquid Equilibrium Compositions and Global Phase Behavior for Lignin–Acetone–Water Ternary at 25, 45, and 65 °C
Liquid–Liquid Equilibrium Compositions and Global Phase Behavior for Lignin–Acetone–Water Ternary at 25, 45, and 65 °C
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25、45 和 65 °C 下木质素 - 丙酮 - 水三元的液 - 液平衡组成和整体相行为
DOI：
10.1021/acs.iecr.9b03522
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发表时间：
2019
影响因子：
4.2
通讯作者：
Thies, Mark C.
中科院分区：
文献类型：
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作者：
Temples, Spencer C.;Gathmann, Sallye R.;Ding, Junhuan;Thies, Mark C.
测定了木质素-丙酮-水体系在液相平衡区的液液相组成和联系线，在液相平衡区可以实施热剂法木质素水溶液纯化工艺。周围的单相，固-液（SL），SLL，丙酮丰富的LL区域也被确定，映射出该系统的全局相行为。在共存的富溶剂和富木质素液相中的溶剂组成（在无木质素的基础上）是非常相似的，并且单相区域延伸到100/50重量/重量丙酮/水，表明丙酮+水相对于木质素聚合物之间的亲和力。这种可再生的伪三元体系表现出可用于分离木质素的低分子量（MW）级分的性质。例如，溶剂与木质素比率为3：1的45/55丙酮/水混合物可用于以15%产率从具有5300的数均MW（Mn）的进料中分离具有1000 Da的数均MW（Mn）的木质素。
Liquid–liquid equilibrium (LLE) phase compositions and tie lines were measured for the lignin–acetone–water system in the region of LLE where the aqueous lignin purification with hot agents (ALPHA) process can be practiced. The surrounding one-phase, solid–liquid (SL), SLL, and acetone-rich LL regions were also identified, mapping out the global phase behavior for this system. Solvent compositions (on a lignin-free basis) in the coexisting solvent-rich and lignin-rich liquid phases are quite similar and the one-phase region extends to ∼50/50 wt/wt acetone/water, indicating affinity between acetone + water with respect to the lignin polymer. This renewable pseudoternary system exhibits properties useful in isolating low-molecular-weight (MW) fractions of lignin. For example, a 45/55 acetone/water mixture at a solvent-to-lignin ratio of 3:1 can be used to isolate a lignin with a number-average MW (M̅n) of 1000 Da at 15% yield from a feed with a M̅nof 5300.
影响因子：
8.4
作者：
Klett, Adam S.;Payne, Mark;Thies, Mark C.
通讯作者：
Thies, Mark C.
来自牛皮纸黑液的溶剂化液体木质素馏分。
影响因子：
11.4
作者：
Julian Velez;M. Thies
通讯作者：
M. Thies