NGLs are separated into components – individual hydrocarbons – in gas fractionation units (GFU). The separation process is similar to that of APG. However, in this case separation must be conducted more accurately. Various products can be made from NGL during the gas fractionation process. These might be propane, butane or a propane-butane mixture (it is called TPBM, or technical propane-butane mixture). TPBM is the most common type of liquefied gases. This is a particular form, in which the product is supplied to people, industrial plants, and for export. Thus, 42 per cent of 1.762 million tons of LPG sold by Gazprom Gazenergoset in 2010 fell on the propane-butane mixture, one-third of supplies fell on butane, and about 14 per cent – on propane.
Technical propane, technical butane, motor fuel propane (MFP) and a motor fuel propane-butane (MFPB) mixture are produced in the same way by NGL fractionation.
There are also other components extracted by NGL processing. These are isobutene, isobutylene, pentane and isopentane.