Method for cleaning pressurized containers containing moisture sensitive chemicals
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United States of America Patent
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Sep 21, 2004
Issued Date -
N/A
app pub date -
Jul 9, 2001
filing date -
Oct 12, 2000
priority date (Note) -
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Abstract
The present invention relates to a method for cleaning a pressurized container having at least one chemical contained therein. The pressurized container may be any type of container able to store chemicals under pressure. Preferably, however, the container is a rail tank car. Generally, the method includes: a step of injecting the container with an input gas to create a chemical/input gas mixture; a step of removing the chemical/input gas mixture via a vacuum pump; and a step of injecting the chemical/input gas mixture into a reaction tank to neutralize the chemical. The input gas may be heated nitrogen gas or heated, dry air. The reaction tank may contain a caustic material for reacting with the chemical.
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