A gas-liquid mixture is a biphasic medium, in which the gas represents the continuous phase and the disperse phase is constituted by liquid drops. The natural gas of gas-condensate fields is in this condition as it enters plants for the dual preparation of gas and condensate (see Part I). Gas and condensate preparation involve the following processes: separation of condensate droplets, water droplets and vapor, and heavy hydrocarbons from the gas, as well as stabilization of separated condensate, i.e. removal of light hydrocarbons and neutral components from the gas. The separation of a condensate from a gas is performed in a gas separator, extraction of water vapor (gas dewatering) and heavy hydrocarbons from a gas is performed in absorbers using special liquid absorbents, and stabilization of condensate is achieved in dividers or deflationers, which are similar in design to oil-and-gas separators. Typical low-temperature separation (LTS) and low-temperature absorption (LTA) technological schemes of plants for the dual preparation of gas and condensate are depicted in Figs. 1.1 and 1.2. The present section deals with the basic processes relating to the preparation of gas and condensate for transportation: separation of gas-condensate mixtures in separators, absorptive dehydration of gas, absorptive extraction of heavy hydrocarbons from gas, and prevention of hydrate formation in gas.