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首页> 外文期刊>Separation and Purification Technology >Caprolactam recovery by a column packed with polysulfone microcapsules containing 1-octanol
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Caprolactam recovery by a column packed with polysulfone microcapsules containing 1-octanol

机译：用装有1-辛醇的聚砜微胶囊填充的柱子回收己内酰胺

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摘要

Caprolactam recovery from its dilute aqueous solution is a challenging task in industry. To save resources and protect environment, a caprolactam recovery technology based on extractant microcapsules as the separation material was introduced. In this new technology, polysulfone microcapsules containing 1-octanol were packed in a column. In the extraction process, recovery ratio of 0.99 was achieved within 0.6 bed volume. More than 10 theoretical plates per meter microcapsule column were realized. In the regeneration process, sulfuric acid aqueous solution was introduced as the stripping agent. Accordingly the new technology can be integrated with existing caprolactam production process because the eluent could be returned to NH3 causticization section. Caprolactam was successfully stripped and concentrated. Caprolactam concentration of 112 g/L in the eluent was obtained. New technology based on extractant microcapsules shows high efficiency in caprolactam recovery.
机译：从稀水溶液中回收己内酰胺在工业上是一项艰巨的任务。为了节省资源和保护环境，引入了以萃取剂微胶囊为分离材料的己内酰胺回收技术。在这项新技术中，将含有1-辛醇的聚砜微胶囊装在色谱柱中。在萃取过程中，在0.6床体积内实现了0.99的回收率。每米微胶囊柱可实现10个以上的理论塔板数。在再生过程中，引入硫酸水溶液作为汽提剂。因此，新技术可以与现有己内酰胺生产工艺集成，因为洗脱液可以返回到NH3苛化段。己内酰胺已成功汽提并浓缩。洗脱液中己内酰胺浓度为112 g / L。基于萃取剂微胶囊的新技术显示出己内酰胺回收的高效率。

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