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Distillation sequence for the purification and recovery of hydrocarbons

Patent ·
OSTI ID:921488
 [1];  [2];  [3];  [3];  [4];  [5];  [6]
  1. Katy, TX
  2. Aurora, IL
  3. Naperville, IL
  4. League City, TX
  5. Houston, TX
  6. Warrington, GB
+ Show Author Affiliations
This invention is an improved distillation sequence for the separation and purification of ethylene from a cracked gas. A hydrocarbon feed enters a C2 distributor column. The top of the C2 distributor column is thermally coupled to an ethylene distributor column, and the bottoms liquid of a C2 distributor column feeds a deethanizer column. The C2 distributor column utilizes a conventional reboiler. The top of the ethylene distributor is thermally coupled with a demethanizer column, and the bottoms liquid of the ethylene distributor feeds a C2 splitter column. The ethylene distributor column utilizes a conventional reboiler. The deethanizer and C2 splitter columns are also thermally coupled and operated at a substantially lower pressure than the C2 distributor column, the ethylene distributor column, and the demethanizer column. Alternatively, a hydrocarbon feed enters a deethanizer column. The top of the deethanizer is thermally coupled to an ethylene distributor column, and the ethylene distributor column utilizes a conventional reboiler. The top of the ethylene distributor column is thermally coupled with a demethanizer column, and the bottoms liquid of the ethylene distributor column feeds a C2 splitter column. The C2 splitter column operates at a pressure substantially lower than the ethylene distributor column, the demethanizer column, and the deethanizer column.
Research Organization:
BP Amoco
Sponsoring Organization:
United States Department of Energy
DOE Contract Number:
FC07-01ID14090
Assignee:
Ineos USA LLC (Lisle, IL)
Patent Number(s):
7,311,813
Application Number:
10/393,460
OSTI ID:
921488
Country of Publication:
United States
Language:
English

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