The potential of micromixers for contacting of disperse liquid phases

Haverkamp, V.; Ehrfeld, W.; Gebauer, Klaus; Hessel, Volker; Löwe, Holger; Richter, Thomas; Wille, Christian

doi:10.1007/s002160051397

Cited by 94 publications

(76 citation statements)

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“…With the help of geometrical focusing, mixing times for miscible liquids are possible in the millisecond time regime. [140] Contact between immiscible liquids [117,[143][144][145] or of gases with liquids [27,146] is of a more complex nature. In the example of liquid jet decay, the liquids are combined in the mixing zone and fragmented into droplets.…”

Section: Microstructured Reactors For Liquid-phase Reactionsmentioning

confidence: 99%

“…the choice of mixing chamber and fluid flow-rates dictates whether a laminar regime (e.g., with a Rayleigh-plateau fragmentation [27][28][29][30][31] ) or a turbulent regime (e.g., with a jet/ towing eddy characteristic [78,143] ) exists. The droplets formed are either very uniform in size with a certain mean diameter or slightly less uniform and smaller.…”

Section: Microstructured Reactors For Liquid-phase Reactionsmentioning

confidence: 99%

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Chemistry in Microstructured Reactors

et al. 2004

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The application of microstructured reactors in the chemical process industry has gained significant importance in recent years. Companies that offer not only microstructured reactors, but also entire chemical process plants and services relating to them, are already in existence. In addition, many institutes and universities are active within this field, and process-engineering-oriented reviews and a specialized book are available. Microstructured systems can be applied with particular success in the investigation of highly exothermic and fast reactions. Often the presence of temperature-induced side reactions can be significantly reduced through isothermal operations. Although microstructured reaction techniques have been shown to optimize many synthetic procedures, they have not yet received the attention they deserve in organic chemistry. For this reason, this Review aims to address this by providing an overview of the chemistry in microstructured reactors, grouped into liquid-phase, gas-phase, and gas-liquid reactions.

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Section: Microstructured Reactors For Liquid-phase Reactionsmentioning

confidence: 99%

Section: Microstructured Reactors For Liquid-phase Reactionsmentioning

confidence: 99%

Chemistry in Microstructured Reactors

et al. 2004

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“…Micro-mixers are also used as a tool for dispersing immiscible liquids and forming micro-droplets [25], or as a separator for particles based on their different diffusion coefficients [26]. Micro-mixers are classified into two types, active and passive mixers.…”

Section: Micro-mixers Evaluationmentioning

confidence: 99%

Fast Fabrication Process of Microfluidic Devices Based on Cyclic Olefin Copolymer

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Murphy

Karazi

et al. 2014

Materials and Manufacturing Processes

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A new low-cost process for fast fabrication of multilayer microfluidic devices using cyclic olefin copolymer film materials is presented. This novel process consists of the fabrication of microfluidic features by xurography, followed by multilayer lamination via cyclohexane vapor exposure. Exposure time to this solvent and compression time were optimized for bond tensile strength. A three-layer microfluidic chip capable of withstanding back pressures up to 23 MPa was fabricated in less than an hour. The suitability of this fast prototyping method for fabrication of functional UV-transparent microfluidic devices was demonstrated by development and testing of a microfluidic mixer and preparation of a polymer monolithic column within the microfluidic channel.

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“…Mithilfe geometrischer Fokussierung können mischbare Flüssigkeiten binnen Millisekunden gemischt werden. [140] Komplizierter gestaltet sich die Kontaktierung von nicht mischbaren Flüs-sigkeiten [117,[143][144][145] oder Gasen mit Flüssigphasen. [27,146] Im Falle des Flüssig-Jet-Zerfalls werden dabei die Flüssigphasen aus den Zuführungsstrukturen in der Mischzone zusammengeführt und zerfallen in Tropfen.…”

Section: Geometrische Parameter Und Prozessgrößen Von Mikrostrukturreunclassified

“…B. mit Rayleigh-Plateau-Fragmentation [27][28][29][30][31] ) oder eine turbulente Strömung vorliegt (z. B. mit Jet/Schleppwirbel-Charakteristik [78,143] [152] Komplizierter ist ein Mikrostrukturreaktor des IMM aufgebaut, der bei BASF für Reaktionen in flüssigen Zweiphasengemischen eingesetzt wird. [23,43,44,153] [83,84] Als Modellreaktion diente die Hantzsch-Thiazolsynthese (Schema 5).…”

Section: Geometrische Parameter Und Prozessgrößen Von Mikrostrukturreunclassified

Chemie in Mikrostrukturreaktoren

et al. 2004

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Mikrostrukturreaktoren haben in den letzten Jahren in der chemischen Verfahrenstechnik deutlich an Bedeutung gewonnen: Erste Firmen, die Prozessanlagen mit Mikrostrukturreaktoren anbieten, sind am Markt, eine Reihe von Instituten erforscht dieses Gebiet, Universitäten bieten Lehrveranstaltungen an, und einige verfahrenstechnisch orientierte Übersichtsartikel liegen bereits vor. Mikrostrukturierte Systeme sind besonders wertvoll für die Untersuchung stark exothermer schneller Reaktionen. Durch isotherme Betriebsweise lassen sich viele thermisch induzierte Nebenreaktionen zurückdrängen, was sicherheitstechnische Vorteile bei Reaktionen mit gefährlichen Reaktanten bringt. Obwohl viele organische Synthesen mit besseren Ergebnissen als in konventionellen Reaktoren durchgeführt wurden, ist der Mikrostrukturreaktor‐Technologie der große Durchbruch in der präparativen Chemie noch nicht gelungen. Aus diesem Grund unterstreicht dieser Aufsatz die Vorteile von Mikrostrukturreaktoren bei Flüssigphasen‐, Gasphasen‐ und Gas‐Flüssigphasen‐Reaktionen.

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The potential of micromixers for contacting of disperse liquid phases

Cited by 94 publications

References 1 publication

Chemistry in Microstructured Reactors

Chemistry in Microstructured Reactors

Fast Fabrication Process of Microfluidic Devices Based on Cyclic Olefin Copolymer

Chemie in Mikrostrukturreaktoren

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