Method and system of modifying a liquid level during start-up operations
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United States of America Patent
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Nov 21, 2017
Grant Date -
Jun 11, 2015
app pub date -
Oct 17, 2014
filing date -
Dec 6, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure provides a method for separating a feed stream in a distillation tower. The method includes operating a controlled freeze zone section in a distillation tower that separates a feed stream at a temperature and pressure at which the feed stream forms a solid in the controlled freeze zone section, wherein the feed stream includes a first contaminant; maintaining a melt tray assembly in the controlled freeze zone section; introducing the feed stream to the controlled freeze zone section; and accumulating a liquid in the melt tray assembly until the liquid is at a predetermined liquid level in the controlled freeze zone section, by: feeding a second contaminant to the controlled freeze zone section; and adding the second contaminant to the melt tray assembly, wherein the liquid comprises the second contaminant.
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