METHOD OF FRACTIONATION OF NATURAL GAS Russian patent published in 2000 - IPC

FIELD: methods of fractionation of natural gas. SUBSTANCE: method consists in separate processing of two flows of raw gas and their parallel amine cleaning from acid components and drying followed by low-temperature oil absorption of cleaned gas of first flow at separation of propane-butane fraction, regeneration of absorption oil and generation of deethanization gas, low-temperature condensation and rectification of cleaned gas of second flow at separation of ethane and propane-butane fraction. Deethanization gas is mixed with second flow of raw before amine cleaning of it from acid components and drying. EFFECT: increased production of ethane and propane-butane fraction due to more complete utilization of deethanization gas; reduced power requirements for performing the process. 1 dwg