Procedure for the continuous analysis of the chloride ions present in the overhead waters of a hydrocarbon distillation column
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United States of America Patent
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Jul 17, 1990
Grant Date -
N/A
app pub date -
Dec 21, 1988
filing date -
Dec 21, 1987
priority date (Note) -
Expired
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Abstract
Procedure and apparatus for the continuous analysis of the chloride ion content of overhead waters downstream of a hydrocarbon distillation column for more effectively preventing hydrochloric acid corrosion of downstream equipment while avoiding over-neutralizing the overhead waters to the detriment of the hydrocarbon product. This procedure comprises the following operations, in the order given or in a different order: Drawing from the overhead waters a stream of water for analysis; removing from the sample so drawn the hydrocarbons as well as the suspended matter; blowing nitrogen into the sample to sweep away the hydrogen sulfide ans the residual hydrocarbons; oxidizing the S.sup.2- or HS.sup.- sulfide ions to sulfate ions; acidifying the sample; finally, measuring by ionometry, and more particularly by means of a combined electrode, the content of chloride ions present.
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