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

Claim 0:
1. A method for preparing 1-butene and propylene, the method comprising:
supplying a C4 mixture stream to a first hydrogenation reactor to convert 1,3-butadiene into 1-butene without isomerizing 1-butene to 2-butene;
supplying a discharge stream from the first hydrogenation reactor to a first distillation column, supplying a lower discharge stream from the first distillation column including 2-butene and n-butane to a metathesis reactor, and supplying an upper discharge stream from the first distillation column including 1-butene and i-butane to a second distillation column;
recovering an upper discharge stream from the second distillation column including i-butane and recovering 1-butene from a lower discharge stream from the second distillation column; and
producing propylene in the metathesis reactor, supplying a discharge stream from the metathesis reactor to a purification unit to recover propylene, and recycling an unreacted material to the metathesis reactor.