| 摘要 |
THE INVENTION RELATES TO A METHOD OF SEPARATING A DRY FEED GAS (1), MAINLY COMPRISING METHANE, ETHANE, AND PROPANE, INTO A FIRST, RELATIVELY MORE VOLATILE PRODUCT (17), CALLED TREATED GAS, AND A SECOND, RELATIVELY LESS VOLATILE PRODUCT (34), CALLED C2 PLUS FRACTION, COMPRISING: (i) AN OPERATION FOR COOLING FEED GAS (1), TURNING IT INTO A COOLED GAS (2),(ii) AN OPERATION FOR SEPARATING AND TREATING COOLED GAS (2) PRODUCED BY OPERATION (i),(iii) A DISTILLATION OPERATION IN A DISTILLATION DEVICE (C3), AND THE CORRESPONDING INSTALLATION.ACCORDING TO THE INVENTION, DISTILLATION DEVICE (C3) COMPRISES AT LEAST FIRST AND SECOND DISTILLATION COLUMNS (C1) AND (C2) OPERATING AT DIFFERENT PRESSURES.(FIG 2)
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