T = 293.15 ~ 363.15 K范围内氯化锂+水+三乙胺三元体系中组分溶解度、相平衡和萃取盐结晶

IF 2.1 3区 工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY
Veronika Danilina, Dmitry Cherkasov*, Yana Klimova and Konstantin Ilin, 
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引用次数: 0

摘要

用目视多热法研究了293.15 ~ 363.15 K范围内氯化锂+水+三乙胺(TEA)体系中组分的相平衡和溶解度。在此温度范围内,组成双组分体系H2O + TEA分层(LCST = 291.45 K),盐形成晶体水合物(LiCl·H2O)。绘制了293.15、323.15和363.15 K下三元体系的相图。LiCl·H2O与两个液相处于平衡状态。用图形确定了单晶态平衡有机相和水相的组成。盐晶体水合物对水胺混合物的盐析作用随着温度的升高而增强。计算了在8种温度下单晶态液相间的TEA分布系数。通过对绘制的等温相图的分析,用萃取结晶法估算了293.15 ~ 313.15 K范围内LiCl·H2O晶体的产率。在293.15 K时,盐晶体水合物的最大收率为39.6%,为引入TEA的70 wt %。所得的溶解度和相平衡数据将有助于优化涉及氯化锂的工艺流程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Solubility of Components, Phase Equilibria, and Extractive Salt Crystallization in the Ternary Lithium Chloride + Water + Triethylamine System from T = 293.15 to 363.15 K

Solubility of Components, Phase Equilibria, and Extractive Salt Crystallization in the Ternary Lithium Chloride + Water + Triethylamine System from T = 293.15 to 363.15 K

Phase equilibria and the solubility of components in the system lithium chloride + water + triethylamine (TEA) were studied in the range 293.15–363.15 K by the visual polythermal method. In this temperature range, the constituent two-component system H2O + TEA delaminates (LCST = 291.45 K), and the salt forms a crystal hydrate (LiCl·H2O). The phase diagrams of the ternary system at 293.15, 323.15, and 363.15 K were plotted. LiCl·H2O is in equilibrium with two liquid phases. The compositions of the equilibrium organic and aqueous phases of the monotectic state were established graphically. The salting-out effect of the salt crystal hydrate on water–amine mixtures is enhanced with increasing temperature. The coefficient of TEA distribution between the liquid phases of the monotectic state was calculated at eight temperatures. Based on our analysis of the plotted isothermal phase diagrams, the yield of LiCl·H2O crystals in the range from 293.15 to 313.15 K was graphically estimated by the extractive crystallization method. The maximum yield of salt crystal hydrate (39.6%) falls on 70 wt % of the introduced TEA at 293.15 K. The obtained data on solubility and phase equilibria will be useful for optimizing technological processes involving lithium chloride.

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来源期刊
Journal of Chemical & Engineering Data
Journal of Chemical & Engineering Data 工程技术-工程:化工
CiteScore
5.20
自引率
19.20%
发文量
324
审稿时长
2.2 months
期刊介绍: The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.
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