| 摘要 |
FIELD: chemical industry. ^ SUBSTANCE: method comprises treating gas in one or several heat exchange stages to produce first raw flow cooled under pressure, expanding the first raw flow to decrease the pressure, supplying raw to the fractionating column, and fractioning cooled and expanded first raw flow at a lower pressure thus extracting relatively light components. The distillation flow is discharged from the fractioning column and heated. The heated distillation flow is returned to the fractioning column. ^ EFFECT: enhanced quality of fractioning. ^ 24 cl, 9 dwg, 2 tbl |
