Vacuum Distilation
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Vacuum Distilation-
Storage Stability of SBS Modified Asphalt Based on Vacuum Distilation Residuum From Liaohe Oil Field
辽河减渣为基质沥青的SBS改性沥青储存稳定性
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Results : The extraction of the percolation with 75 % ethanol was better than reflux , drying at 60 ° C and vacuum distilation was optimum condition .
结果：以75%乙醇为溶剂，用渗漉法提取较回流法优；对药液的浓缩，用真空浓缩法优于常压浓缩法；