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Zeolite Membrane Microreactors for Fine Chemical Synthesis

机译:沸石膜微反应器,用于精细化学合成

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Fine chemicals and pharmaceuticals are high value added products that are produced in modest quantities. They are usually seasonal products that are customer specific and have a short shelf life. These characteristics usually placed a significant constraint in their production, such that it is not uncommon to see labour intensive batch processes being used instead of the more efficient continuos process. This usually led to a significant waste generation during the scale-up from the laboratory to production scale. In addition, the use of hazardous and often toxic homogeneous catalysts makes the product purification and waste disposal an important issue in today's stringent environmental regulations. Microchemical systems offer a new paradigm for meeting these challenges. Recent advances in the design and fabrication of micromixers, microseparators and microreactors bring closer the realization of desktop miniature factories and micropharmacies. They represent a cheap alternative way for the production of specialty chemicals and pharmaceuticals by a continuous process, allowing simpler process optimization, rapid design implementation, better safety and easier scale-up through replication. This enables rapid product deployment to the marketplace and thus ensuring a significant competitive edge. New basic zeolite catalysts obtained by grafting amino groups onto NaX and CsNaX zeolites exhibit excellent catalytic activities for Knoevenagel condensation reaction between benzaldehyde and ethyl cyanoacetate (ECA), ethyl acetoacetate (EAA) and diethyl malonate (DEM). The CsNaX-NH{sub}2 catalyst displays higher conversion compared to aminopropylated MCM-41 for benzaldehyde reaction with ECA and DEM (Figure. 1).
机译:精细化学品和药品是在适度的数量中产生的高附加值产品。它们通常是客户特定的季节性产品,并具有较短的保质期。这些特性通常在其生产中置于显着的限制,从而看到使用的劳动密集型批处理过程并不罕见,而不是更有效的连续过程。这通常导致在从实验室到生产规模的扩展过程中发生了重要的废物。此外,使用危险和常毒性均相催化剂使产品净化和废物处置成为当今严格的环境法规中的重要问题。微型化学系统提供了一种满足这些挑战的新范式。 Micrixers的设计和制造的最新进展,微助药器和微反应器的设计和制造带来了桌面微型工厂和小医生的实现。它们代表了一种廉价的替代方法,用于通过连续过程生产特种化学品和药品,允许更简单的过程优化,快速设计实现,更好的安全性,更轻松地通过复制扩展。这使得能够快速向市场部署到市场,从而确保具有重要竞争优势。通过将氨基嫁接到Nax和Csnax沸石上获得的新基沸石催化剂在苯甲醛和乙基氰基乙酸乙酯(ECA),乙基乙酸乙酯(EAA)和丙二酸二乙酯(DEM)之间表现出优异的催化活性。 CSNAX-NH {亚} 2催化剂与氨基丙烯化的MCM-41与ECA和DEM(图1)相比显示与氨基丙烯化的MCM-41相比更高的转化率(图。1)。

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