Apparatus for preparing high-concentration alkali
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United States of America Patent
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May 22, 1990
Issued Date -
N/A
app pub date -
Jun 2, 1988
filing date -
Apr 18, 1985
priority date (Note) -
Expired
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Abstract
A high pressure evaporation vessel which is operated at a predeterminate pressure above atmospheric pressure, is connected to a low pressure expansion vessel which is operated at a predeterminate pressure below the pressure prevailing in the high pressure evaporation vessel, through a U-shaped siphon tube. The U-shaped siphon tube contains a liquid column absorbing the pressure difference existing between the high pressure evaporation vessel and the low pressure expansion vessel.
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