In this work, the feasibility of ionic liquids (ILs), 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]), 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]), and 1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][DBP]), as solvents for the extraction of methanol from its mixtures with hexane and heptane was analyzed. The knowledge of (liquid + liquid) equilibria (LLE) of these mixtures is necessary for the design of the extraction separation process. Hence, the LLE data for the ternary systems, {methanol + hexane + ([MMIM][DMP], or [EMIM][DEP], or [BMIM][DBP])}, and {methanol + heptane + ([MMIM][DMP], or [EMIM][DEP], or [BMIM][DBP])}, were measured at T = 298.2 K and atmospheric pressure. The experimental results were correlated with the thermodynamic nonrandom two-liquid (NRTL) model. The solute distribution ratios of methanol and methanol/alkane selectivities, derived from the experimental LLE data, were calculated and analyzed to evaluate the capability of the studied ILs to accomplish the separation target. Meanwhile, these capabilities were also compared with that of other ILs obtained from the literature.
Zhihao Lu,Xiangwei Liao,Chenglin Zhao,Deli Shang,Haiwei Wang,Chengjun Liu
This paper proposed an innovative electrochemical method for copper recovery from spent sulfide slag (Na2S-FeS-Cu2S), generated during copper removal from iron-based melts. It aims to reduce the high decopperization agents' consumption caused by low copper distribution ratio during the copper removal process, address the cost issues by recycle of slag and recovery of copper, and expand the application potential of the emerging copper removal method using the sulfide slag systems. The feasibility of electro-recovery of copper is verified by cyclic voltammetry tests and potentiostatic electrolysis experiments. The results show that in the Na2S-FeS-Cu2S melt, although copper cannot be reduced alone without reducing iron, rough separation can be achieved by controlling the temperature. The current efficiency of Cu+ reduction in the molten sulfide is about 9.1% due to electronic conduction in the sulfide melt, which needs further improvement. The slag treated by the innovative electrochemical process can be reused, as the XRD results show that it has a similar composition to the primary slag unused.
Mengting Yu,Chengdeng Chi,Shuangxia Huang,Xiaoxi Li
This study presented a novel strategy to regulate postprandial glucose levels by engineering colon-targeted nanoparticles with tailored lecithin distribution for enhancing Glucagon-like peptide-1 (GLP-1) secretion. GLP-1 plays a pivotal role in regulating postprandial glucose homeostasis. Firstly, type I starch-lecithin complex (OSL) was fabricated with excellent digestion resistance (47.89 % resistant starch) and self-assembly performance (0.58 mg/mL CMC). Lecithin solutions were then incorporated into OSL to form OSL/lecithin nanoparticles (180–200 nm, negatively charged surface) with different distribution ratios of lecithin inside and outside starch helical cavity. With distribution ratio of lecithin increased from 1:1.25 to 1:10, β-lactoglobulin colon release improved by 21.67 %. Microbial fermentation led OSL/Lecithin based nanoparticles to release β-lactoglobulin, lecithin, reducing sugars, and SCFAs, which collectively boosted GLP-1 secretion by 169.48 % and 36.07 % compared with β-lactoglobulin and mixed OSL/Lecithin, respectively. This research offered a new strategy for targeted delivery of bioactive molecules to modulate GLP-1 secretion.
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