On the Synthesis of Distillation Sequences for mixtures of water, hydrogen chloride and hydrogen fluoride

Peter Pöllmann
SGL Group

Because of extreme toxicity and corrosivity of aqueous mixtures of hydrogen chloride and hydrogen fluoride, mini or pilot plant experiments for such mixtures are very difficult and expensive. For the same reason, vapor-liquid equilibrium data for water-HCl-HF mixtures are not available in the openly accessible literature. Consequently, commercial process simulators, such as for example AspenPlus^TM, cannot immediately be used for the synthesis of distillation sequences for the mixture in question. It will be shown, how a combined approach of „pen-and-paper methods“ of ternary distillation, open evaporation experiments, and simulations using ESP^TM from OLI Systems can be utilized for the basic design of a feasible distillation sequence for the purification of hydrochloric acid.
 

Peter Pöllmann, SGL Group  

Peter Pöllmann had been working for two years as a Customer Support Engineer for AspenTech, Brussels, when he joined Process Equipment Development of SGL Group. He is in charge for the design of systems and unit operations for the processing of corrosive mixtures by use of process simulation. Peter holds a Ph.D. in process engineering from the Technical University of Munich, Germany

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