Chemical Process
Penicillin is separated from fermented broth by

Ternery azeotropic distillation
Evaporation in calendria
Extraction with amyl or butyl acetate
Extractive distillation

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Chemical Process
Liquefaction of gases can not be done by

Adiabatic expansion against a piston or in a turbine
Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
Merely compressing it beyond critical pressure
Exchange of heat with colder stream

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