Patent ID: 8968551
Filing Date: 2015-03-03
Classification: C08L,C10C,C10G

Abstract:
1. A method for forming an asphalt fraction, comprising: selecting a high temperature performance grade for all asphalt fraction; receiving a blend of a plurality of crude fractions, the blend of the plurality of crude fractions comprising 20 wt % to 70 wt % of a Napo crude fraction, the blend of crude fractions having a predicted low temperature performance grade using a linear average prediction model at the selected high temperature performance grade that is at least 2.5° C. greater than a low temperature performance grade for the Napo crude oil at the selected high temperature performance grade; and separating the blend of crude fractions to form an asphalt fraction having a high temperature performance grade that differs from the selected high temperature performance grade by 0.1° C. or less, the low temperature performance grade of the blended asphalt being lower than the predicted low temperature performance grade by at least 0.5° C.