Process for the Preparation of a Urea-Comprising Aqueous Stream
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United States of America Patent
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Issued Date -
Nov 20, 2008
app pub date -
Feb 24, 2006
filing date -
Mar 9, 2005
priority date (Note) -
Abandoned
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Abstract
The invention relates to a process for the preparation of a urea-comprising aqueous stream, that is suitable for use in a unit for the reduction of NO.sub.x in combustion engine exhaust gases, wherein the urea-comprising aqueous stream is separated directly from or after a recovery section in a urea production process and is thereafter diluted with water until the urea-comprising stream comprises 30-35 wt % urea.
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