SIHI process

Fig. 2.12 SIHI process employing medium temperature condensation.

The SIHI membrane, as well as preferentially allowing solvents to pass, also permeates water. Even if water is not deliberately added to the SLA it is likely that permeated solvent will also pick up atmospheric moisture. Sparingly water-miscible solvents, such as hydrocarbons, will separate in a simple phase separator but a drying process will need to be added to the equipment if dry solvent must be recovered. 

Sihi MP, Manyem S, Zimmerman J. Enantioselective radical processes. Chem. Rev. 2003 103(8) 3263-3295. 

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