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首页> 外文期刊>Separation and Purification Technology >Hyperbranched polymers:new selective solvents for extractive distillation and solvent extraction
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Hyperbranched polymers:new selective solvents for extractive distillation and solvent extraction

机译：超支化聚合物：用于萃取蒸馏和溶剂萃取的新型选择性溶剂

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摘要

Ternary vapor-liquid (VLE) equilibria of ethanol-water and tetrahydrofuran(THF)-water solutions containing different kinds of hyperbranched polymers arepresented.For the system THF-water-hyperbranched polyester a remarkably distinct solutropic phenomenon is observed.Commercially available hyperbranched polyesters and hyperbranched polyesteramides are foundto be capable of breaking the ethanol-water and THF-water azeotrope.The experimentalresults underline the potential of hyperbranched polymers in the field of process engineering,especially as an entrainer for exgtractive distilation and as selective solvents for solvent extraction.The non-volatility of hyperbranched polymers in combination with their remarkable separation efficiency and selectivity enables new processes for the separation of azeotropic mixtures.The separation approaches proposed might offer a potentialfor cost-savings in comparison with conventional separation processes.
机译：给出了包含不同种类超支化聚合物的乙醇-水和四氢呋喃（THF）-水溶液的三元汽-液（VLE）平衡。对于THF-水超支化的聚酯体系，观察到明显的溶溶现象。发现超支化聚酯酰胺能够破坏乙醇-水和THF-水共沸物。实验结果强调了超支化聚合物在工艺工程领域的潜力，尤其是作为萃取分散剂的夹带剂和作为溶剂萃取的选择性溶剂。高支化聚合物的高挥发性及其出色的分离效率和选择性为共沸混合物的分离提供了新的方法。与常规分离方法相比，提出的分离方法可能具有节省成本的潜力。

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