SYSTEM AND METHOD FOR IMPROVING PROPANE RECOVERY AND ETHANE REJECTION IN A GSP/ EXPANDER SYSTEM
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United States of America Patent
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Issued Date -
Sep 26, 2024
app pub date -
Mar 22, 2023
filing date -
Mar 22, 2023
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Abstract
A system and method for enhancing propane recovery in a GSP system operated in an ethane rejection mode using an add-on system comprising a heat exchanger and a condenser and optionally a reflux column having 0-5 theoretical stages. An overhead stream from a GSP fractionation column and a subcooled expanded GSP stream are diverted from the typical GSP process for processing in the add-on system to provide an additional reflux stream that increases the amount of ethane and propane that feeds into a top level of the GSP fractionation column. In ethane rejection mode, the add-on system results in an NGL product stream preferably comprising less than 6% of the ethane and at least 97% of the propane from the GSP feed stream.
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