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首页> 外文期刊>Environmental Science & Technology >Removal Of Common Organic Solvents From Aqueous Waste Streams Via Supercritical Co_2 Extraction: A Potential Green Approach To Sustainable Waste Management In The Pharmaceutical Industry
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Removal Of Common Organic Solvents From Aqueous Waste Streams Via Supercritical Co_2 Extraction: A Potential Green Approach To Sustainable Waste Management In The Pharmaceutical Industry

机译：通过超临界Co_2萃取从含水废水中去除常见有机溶剂：制药行业可持续废物管理的潜在绿色方法

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摘要

Supercritical CO_2 extraction of aqueous streams is a convenient and effective method to remove commonly used solvents of varying polarities from aqueous waste streams. The resulting aqueous layers can potentially be sewered; whereas the organic layer can be recovered for potential reuse.rnSupercritical fluid extraction (SFE) is a technology that is increasingly being used in commercial processes (1). Supercritical fluids are well suited for extraction of a variety of media, including solids, natural products, and liquid products. Many supercritical fluids have low critical temperatures, allowing for extractions to be done at modestly low temperatures, thus avoiding any potential thermal decomposition of the solutes under study (2). Furthermore, the CO_2 solvent strength is easily tuned by adjusting the density of the supercritical fluid (The density is proportional to the pressure of the extraction process). Since many supercritical fluids are gases at ambient temperature, the extract can be concentrated by simply venting the reaction mixture to a cyclone collection vessel, using appropriate safety protocols.
机译：超临界CO_2萃取水流是一种方便有效的方法，可以从水流中去除极性不同的常用溶剂。产生的水层可能会被下水；超临界流体萃取（SFE）是一项在商业流程中越来越多地使用的技术（1）。超临界流体非常适合提取多种介质，包括固体，天然产物和液体产物。许多超临界流体的临界温度都较低，因此可以在适度的低温下进行萃取，从而避免了所研究溶质的任何潜在热分解（2）。此外，可通过调节超临界流体的密度（密度与萃取过程的压力成正比）来轻松调整CO_2溶剂的强度。由于许多超临界流体在环境温度下都是气体，因此可以使用适当的安全规程，只需将反应混合物排入旋风分离器，即可浓缩萃取液。

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