1984 Volume 27 Issue 6 Pages 525-532
In order to estimate the amount of paraffin wax expected to be precipitated from deep dewaxed paraffinic transformer oil in a temperature range from -50 to -60°C, the paraffin wax was separated by using an urea adducts method, and calorimetric measurements were made of the oil, the wax and the residual oil by use of Differential Scanning Calorimetry (DSC). Adding various amounts of the wax to the residual oil, calorimetric measurements were also made of them. The paraffin wax was also chemically analyzed. Consequently, it has become clear that the paraffin wax content can be estimated roughly by using its heat of fusion and that the pour point of the paraffinic oil specimen seems to be related to the DSC crystallization peak temperature and to the heat of fusion, respectively. Finally, it has been suggested that one may employ this DSC method as one of the excellent methods for estimating paraffin wax content in paraffinic transformer oil.
