Some Parameters of Asphalt Dispersed Phase Particle Size in Two-Stage Heavy Resid Oxidation Process

Resumo

The changes in asphalt dispersed phase particle size in two-stage heavy resid oxidation process are studied. The influence of the temperature of each oxidation stage on the dispersed phase particle size is shown. The selection of the process parameters, which ensures formation of the smallest dispersed phase particle size and formation of sol-gel asphalt structure with the maximum stability factor and improved physicochemical properties, is validated. An idea of the chemical processes occurring during asphalt oxidation are proposed to be gained from the change in dispersed phase particle size.