Methods for Safe Evaporation of Hydrochloric Acid Containing Solutions

Hydrochloric acid (HCl) is a versatile reagent in organic molecule synthesis and purification. However, laboratories often have difficulties in removing acid from samples, especially in parallel, owing to the corrosive nature of HCl affecting non-glass components. This article reviews a selection of organic synthesis / purification reactions where HCl has to be removed post reaction. The paper further discusses evaporation solutions to the problems which routine use of concentrated HCl can create..

 

Safe Evaporation of HCl Containing Solutions

In the applications described HCl is either used as a reagent or it is generated in the reaction. When using HCl care must be taken when selecting the equipment to handle this corrosive acid

Genevac have developed HCl-resistant centrifugal evaporators (Figure 1). These specialist systems have corrosion-resistant materials to prevent acid attack. Seals made of chemically resistant elastomers and  PTFE coating to improve the HCl resistance of irreplaceable components in the vapor path.

EZ-2 HCI resistant system

Figure 1. Genevac EZ-2 HCI resistant system. Image credit: SP Scientific

 

Conclusion

HCl removal from multiple samples simultaneously has to deal with corrosion problems as residual acid in low concentrations can cause system failure. The advent of Genevac’s HCl-resistant centrifugal evaporators allows chemists to perform reactions using HCl without compromising their preferred organic synthetic route pathway.

Acknowledgements

Produced from materials authored by Dr Induka Abeysena from Genevac Ltd, Ipswich, UK.

This information has been sourced, reviewed and adapted from materials provided by Genevac.

For more information on this source, please visit Genevac.

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