Patent ID: 11946002
Assignee: SINOPEC ENGINEERING INCORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 9:
10. The method for treating an oil gas according to claim 5, wherein:
in step (a), the first separation is performed at conditions comprising: a temperature of 5-25° C., a pressure of 2.0-3.5 MPaG; and/or,
in step (b), the second separation is performed in a demethanizer, wherein the demethanizer has a temperature at a top thereof of 10-40° C., a temperature at a bottom thereof of 70-95° C., and an internal pressure of 2.3-2.9 MPaG; and/or,
in step (c), when it is intended to obtain the C2 product mainly containing C2 and the liquid-phase material mainly containing C3-C4, the third separation is performed in a deethanizer, the deethanizer having a temperature at a top thereof of −20-30° C., a temperature at a bottom thereof of 50-110° C., and an internal pressure of 2.2-3.8 M PaG; when it is intended to obtain the C3 product mainly containing C3 and the liquid-phase material mainly containing C2 and C4, the third separation is performed in a depropanizer, the depropanizer having a temperature at a top thereof of 20-60° C., a temperature at a bottom thereof of 70-120° C., and an internal pressure of 1.2-2.5 MPaG; and/or,
in step (d), when it is intended to obtain the C4 product mainly containing C4 and the C3 product mainly containing C3, the fourth separation is performed in a depropanizer, the depropanizer having a temperature at a top thereof of 20-60° C., a temperature at a bottom thereof of 70-120° C., and an internal pressure of 1.2-2.5 MPaG; when it is intended to obtain the C44 product mainly containing C4 and the C2 product mainly containing C2, the fourth separation is performed in a deethanizer, the deethanizer having a temperature at a top thereof of −20-30° C., a temperature at a bottom thereof of 50-110° C., and an internal pressure of 2.2-3.8 MPaG; and/or,
in step (e), the rectification is performed at conditions comprising: a temperature of 45-65° C., and a pressure of 1.8-2.0 MPaG.