| 摘要 |
A method for determining the TAN (total acid number) value of a hydrocarbon-containing composition, in which the sample is cleared of free water, heated to an elevated temperature in an oxygen free environment, conditioned at the elevated temperature for an extended period of time, cooled down to a temperature near to room temperature, and titrated against alcoholic potassium hydroxide and the TAN value is calculated. The conditioning at high temperature is thought to increase the proportion of acid species available to the base and so better represent the true acid number. The TAN derived can be used as a predictor of corrosiveness and the formation of soaps both of which can cause operational problems. |
