掺炼糠醛抽出油 ,改变了丙烷脱沥青装置原料性质 ,通过调整部分操作参数 ,可提高轻脱油和重脱油的收率 ,改善脱油沥青质量 ,直接生产出合格的高标号道路沥青 Blending furfural extraction oil, changing the nature of propane deasphalting device raw materials, by adjusting some of the operating parameters, can increase the light off the oil and the yield of heavy oil off, improve the quality of de-asphalted asphalt directly to produce qualified high-grade road asphalt