Dissociation-extraction separation mode

Distillation combined with reaction has been successfully used for separating close boiling mixtures. When used in this separation mode, the technique is frequently referred to as dissociation-extractive distillation. It can also be used in the reaction mode by continuous separation of the reaction products from the reactants. The equipment used in the latter case is often referred to as a distillation column reactor (DCR). The chief advantage of this method is that the reactants can be used in stoichiometric quantities, with attendant elimination of recycling costs. 

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