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Naphtha:

The extraction of LPG from natural gas is carried out by cryogenic turbo - expander process at all LPG plants of GAIL. In this process Propane & Butane are extracted from natural gas by cooling it to -55 to -68 degrees C. As natural gas contains heavier components (Pentane, Hexane, Heptane etc.) than Propane & Butane also, whenever natural gas is cooled for the extraction of LPG, these heavier components also get liquefied along with Propane & Butane. LPG is separated from this total liquid by distillation and the balance liquid is called Natural Gasoline Liquid. This NGL is then further processed to manufacture Pentane and Naphtha.