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flow chemistry
In flow chemistry, a chemical reaction is run in a continuously flowing stream rather than in batch production. In other words, pumps move fluid into a tube, and where tubes join one another, the fluids contact one another. If these fluids are reactive, a reaction takes place. Flow chemistry is a well-established technique for use at a large scale when manufacturing large quantities of a given material. However, the term has only been coined recently for its application on a laboratory scale.〔A. Kirschning (Editor): (Chemistry in flow systems ) and (Chemistry in flow systems II ) Thematic Series in the Open Access Beilstein Journal of Organic Chemistry.〕 Often, microreactors are used.
== Batch vs. flow ==
Comparing parameters in Batch vs Flow:
*Reaction stoichiometry. In batch production this is defined by the concentration of chemical reagents and their volumetric ratio. In Flow this is defined by the concentration of reagents and the ratio of their flow rate.
*Residence time. In batch production this is determined by how long a vessel is held at a given temperature. In flow the volumemetric residence time is used given by the ratio of volume of the reactor and the overall flow rate, as most often, plug flow reactors are used.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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