阿曼减渣溶剂脱沥青制备光亮油料和30#硬质道路沥青

Solvent deasphalting process of Oman vacuum residue to produce bright stock and 30# hard asphalt

以阿曼减渣为原料,对其丙烷脱沥青工艺的溶剂组成和操作条件进行优化,对制备的30#硬质沥青的混合料性能进行考察,并采用固定床催化裂化装置对重脱沥青油的催化裂化性能进行研究。实验结果表明,丙烷脱沥青工艺的最佳条件为:混合溶剂(20%(w)异丁烷、80%(w)丙烷),抽提塔塔顶温度68℃,沉降塔塔顶温度81℃,溶剂体积比5.0,抽提压力4.35MPa;在此条件下,轻脱沥青油收率为25.1%,其性质满足光亮油料指标要求;脱油沥青收率为46.0%,软化点61.7℃,采用沙中减渣为调和软组分可制备出合格的AH-30硬质沥青,30#沥青混合料具有良好的车辙动稳定度和浸水残留稳定度;重脱沥青油可作为重油催化裂化原料,轻油收率(汽油+柴油)为61.70%。

The solvent composition and operating conditions of propane solvent deasphalting of Oman vacuum residue were optimized, and the mixture performance of blended 30# asphalt was investigated; meanwhile, the catalytic cracking performance of heavy deasphalted oil was studied in fixed bed catalytic cracking unit. The result showed that the optimal conditions were as follows： mixture solvent of 80%（w） propane and 20%（w）/so-butane, extraction tower top temperature of 68 ℃, settling tower top temperature of 81 ℃, volume ratio of solvent to vacuum residue of 5.0, extraction pressure of 4.35 MPa; Under this condition, the yield of light deasphalted oil was 25.1% and the properties of light deasphalted oilconformed to the requirement of bright stock; the yield of de-oil asphalt was 46.0% and the softening point of de-oil asphalt was 61.7℃ ; meanwhile, de-oil asphalt could be used to produce 30# asphalt by blending with Saudi Arab Middle vacuum residue, and the blended 30# asphalt mixture had high rut dynamic stability and water resistant stability. Heavy deasphalted oil could be used as feedstock of catalytic cracking and light yield oil （gasoline and diesel） was 61.70%.