Patent ID: 11905238
Assignee: LG CHEM, LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 10:
11. The method for preparing 1-butene and propylene of claim 10,
wherein the purification unit includes a first purification column and a second purification column,
wherein the discharge stream from the metathesis reactor is supplied to the first purification column, an upper discharge stream from the first purification column including an unreacted ethylene monomer is recycled to the metathesis reactor, and a lower discharge stream from the first purification column is supplied to the second purification column, and
wherein propylene is recovered from an upper discharge stream from the second purification column and a lower discharge stream from the second purification column including an unreacted C4 mixture is recycled to the metathesis reactor.