PROCESS FOR THE DETERMINATION OF THE TOTAL ACIDITY NUMBER (TAN) OF A MINERAL INSULATING OIL
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United States of America Patent
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Issued Date -
Nov 21, 2013
app pub date -
Feb 28, 2012
filing date -
Feb 28, 2011
priority date (Note) -
Abandoned
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Abstract
A method includes pouring in a container a sample of oil and a pre-established amount of a solution suitable for extracting the acid fraction of the sample; stirring the content of the container and waiting for the separation from the sample of an extract phase. A titrant solution of KOH is dosed in the extract phase until an acid-base indicator present therein changes color. The TAN is calculated on the basis of the volume of dosed titrant solution according to the formula: TAN (mgKOH/goil)=(V×56.1×M)/m wherein V is the volume of dosed titrant solution expressed in ml, 56.1 is the molecular weight of KOH, M is the titre of the KOH solution expressed in moles per litre and m is the mass of the sample expressed in g.
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