| 摘要 |
<p>The invention relates to a Soxhlet type asphalt extractor for extracting through a filter (3) asphalt in an asphalt mixture (C) within the filter (3) by condensing a solvent (A), which has evaporated from a flask (1), in a cooler (4) and dripping the solvent in the filter (3). The flask (1) and the filter (3) are covered by a heat insulating casing (51), and are heated and kept warm by heat from a gas burner (2). In order to lower a boiling point of the solvent (A) in the flask (1), pressure in the flask (1), filter (3) and the cooler (4) is reduced by a pressure reducing device (6).</p> |
