PROCESS FOR PREPARING 4-AMINODIPHENYLAMINE
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United States of America Patent
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app pub date -
Jun 7, 2007
filing date -
Jul 4, 2003
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Abandoned
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Abstract
A falling film evaporator having a shell pass, a tube pass, a steam inlet on top of the shell pass, a condensed water outlet at bottom of the shell pass, a lower concentration aqueous phase inlet on top of the tube pass, a higher concentration aqueous phase outlet at bottom of the tube pass, a flow-aiding steam inlet on top of the tube pass, and a distributing tray below the lower concentration aqueous phase inlet.
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