Reducing methanol emissions from a syngas unit
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United States of America Patent
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Jan 18, 2000
Grant Date -
N/A
app pub date -
Aug 13, 1998
filing date -
Aug 13, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methanol emissions in the CO.sub.2 vent from a synthesis gas unit in an ammonia or hydrogen plant are reduced by contacting raw synthesis gas from a low temperature shift converter with recycled stripped condensate to absorb methanol. The synthesis gas is treated in a purification unit to form the CO.sub.2 vent of reduced methanol content. The condensate from the contacting step is steam stripped to form a process steam stream suitable for feed to the reformer and a stripped process condensate stream suitable for offsites polishing, a portion of which is recycled for contacting the raw synthesis gas.
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