AMMONIA RECOVERY WITH PURGE FOR CORROSION CONTROL
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Jun 24, 2013
filing date -
Jul 19, 2012
priority date (Note) -
Abandoned
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Abstract
The present invention relates to reduction of corrosion. The present invention includes a method of decreasing corrosion during ammonia extraction. The method includes performing a process to extract ammonia using ammonia extraction equipment. The ammonia extraction equipment includes an ammonia absorber, an ammonia desorber, and an aqueous solution. The aqueous solution includes an acid or an ammonium salt thereof. The method also includes purging at least part of the aqueous solution. The purged part of the aqueous solution includes at least one corrosion-promoting ion. The method also includes adding a replacement aqueous solution to the aqueous solution. The replacement aqueous solution has a reduced concentration of the at least one corrosion-promoting ion as compared to the purged part of the aqueous solution. The invention also provides a system that can perform the method.
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