Patent ID: 11952339
Assignee: SK INNOVATION CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method of recovering unreacted ethylene in an ethylene oligomerization process, the method comprising:
in the ethylene oligomerization process,
mixing a first recovery stream comprising the unreacted ethylene and a low boiling point reaction product separated in a second separation device in a latter stage of a reactor with a solvent introduced to a reaction raw material;
transferring the mixture to a first separation device, wherein an oligomerization catalyst introduced to a reaction raw material is introduced to the first separation device;
separating the mixture into a first upper effluent comprising the low boiling point reaction product and a first lower effluent comprising the ethylene and the solvent in the first separation device;
transferring the first lower effluent in the first separation device to the reactor and performing an ethylene oligomerization reaction; and
transferring a first reactant reacted in the reactor to the second separation device and recovering the first recovery stream comprising the unreacted ethylene and the low boiling point reaction product as a second upper effluent and separating a reactant comprising C4 or higher olefin oligomers and the solvent as a second lower effluent.