UOP Standard Withdrawn, Replaced   Last Updated: Jul 25, 2002 Track Document
ASTM UOP210-76T

Caustic Solution Analysis - Double Indicator

Caustic Solution Analysis - Double Indicator UOP210-76T UOP|UOP210-76T|en-US Caustic Solution Analysis - Double Indicator Standard new
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Universal Oil Products

This method is a convenient, though not rigorous, test for the plant control of refinery caustic solutions used to remove hydrogen sulfide, mercaptans and certain other weak acids from petroleum products. The method is also applicable to Merox circulating caustic. The results are significant only when correlated with plant experience.

While the Double Indicator Procedure may be a convenient procedure to use, a potentiometric procedure is more accurate and can distinguish between strong bases; i.e., sodium phenolate and sodium hydroxide. See UOP Method 209.

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