| 摘要 |
Apparatus for determining the pour point of a normally liquid composition having constituents which crystallize upon being cooled by observing the temperature at which the solidifiable constituents in a sample of the composition, upon being cooled, will support a small object. This point is indicated by discontinuance in an automatically recorded time/temperature curve. This solid point correlates with the ASTM solid point and also the ASTM pour point temperature which is 5 DEG F. above the solid point temperature. The inception point of a plateau in the time/temperature curve during the cooling portion of the cycle is the crystal point. This crystal point correlates with the ASTM cloud point. Modification of the apparatus for continuous service can be accomplished by automatically introducing the sample, heating, then cooling, removing the sample and recirculating a fresh sample.
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