Chemical Process
Zeolite is used in the

Glass manufacture
Hydrogenation of fatty oil as a catalyst
Water treatment
Development of exposed photographic plate

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Chemical Process
Liquefaction of gases can not be done by

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

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