Chemical Process
Linde process of gas liquefaction employs

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

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Chemical Process
Wax is a

Liquid at room temperature
Mixture of esters of polyhydric alcohols excepting glycerine
Mixture of glycerides of fatty acids
Mixture of glycerides

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