Abstract
Though the 1.1.1trichloroethane has been chiefly used in the test of extraction of asphalt so far, it was abolished in 1995 because of the consideration of safety to man and the environment. As a result, it is a current state that a substitute solvent of the vegetable or the oil is selected in each organization, and the full automation machine is developed. However, these methods still have some problems about the method of the extraction of the reforming asphalt, dryness, and the waste fluid processing.
Therefore, to solve these problems, we attempted the use of supercritical water to the extraction examination. As a result, it was elucidated that supercritical water had an enough ability to extract asphalt, and to collect a corpuscle material. This suggests being able to use water to test of extraction as a solvent, and we report on these.
