Process for LPG recovery
Patent
·
OSTI ID:6088453
This patent describes an improvement in a process for separating propane and heavier hydrocarbons from a gaseous feedstream containing hydrocarbon components of different boiling points wherein the feedstream is cooled and separated into a first vapor fraction and a first liquid fraction and the first liquid fraction is distilled in a deethanizer to form a second vapor fraction and a second liquid fraction. The improvement comprises expanding and transferring the first vapor fraction to the lower portion of a direct heat exchanger, cooling {ital at least a portion of} the second vapor fraction {ital by passing it through an indirect heat exchanger} to form a substantially liquefied stream, {ital partially flashing at least a portion of the liquefied stream and transferring it} to the upper portion of the direct heat exchanger whereby the liquefied stream contacts the first vapor fraction to form a third vapor fraction and a third liquid fraction, {ital transferring} the third liquid fraction to the deethanizer, and removing the third vapor fraction from the direct heat exchanger {ital and passing the third vapor fraction through the indirect heat exchanger}.
- Assignee:
- Exxon Production Research Co., Houston, TX (USA)
- Patent Number(s):
- A; US Re 33408
- Application Number:
- PPN: US s 6-809666
- OSTI ID:
- 6088453
- Country of Publication:
- United States
- Language:
- English
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