Preparation and evaluation of hard asphalts by different process

doi:10.16085/j.issn.1000-6613.2017-0386

Abstract

Abstract: Preparation and evaluation of 30^# hard road asphalts by vacuum distillation,solvent deasphalting,combination of solvent deasphalting and blending process for Iran residue were investigated. The results showed that,30^# hard road asphalt was prepared and met technical requirements of GB/T 15180-2010 by raising the distillation depth,and the yield of light distillate increased by 8.1%. 30^# hard asphalt could be prepared by solvent deasphalting process,while the DAO yield was so low,about 6.6%~16.0%,that resulted in poor economic benefits. The combination of solvent deasphalting and blending process was used to produce 30^# hard asphalt with good performance at high and low temperature,and the suitable operating conditions were as follow:butane of solvent,extraction tower temperature of 107℃,extraction pressure of 3.8 MPa,solvent-oil ratio of 2.9(mass ratio),DAO yield was 41.2%. The carbon residue content and metal content of DAO were less than 8% and 30μg/g,respectively,and met the requirements of FCC feedstock. The softening point and penetration of hard DOA were 105.4℃ and 0,respectively,and the Chunfeng residue and 90^# asphalt were appropriate as soft components of blending process. The results of mix performance tests indicated that, compared with 70^# asphalt,30^# hard asphalt mixture had very good anti-high temperature deformation ability,good water stability,and had the same effect of modified asphalt. Its applications on surface of the middle and lower layer road would improve the pavement anti-rutting ability.

Key words: hard road asphalt, vacuum distillation, solvent deasphalting, blending process, asphalt mixture

摘要： 以伊朗重质渣油为原料，对其采用减压深拔、溶剂脱沥青、溶剂脱沥青+调和组合工艺制备30^#硬质道路沥青可行性进行考察。结果表明，减压深拔和溶剂脱沥青+调和工艺用来制备硬质道路沥青较为适宜。采用减压蒸馏工艺较为简单，适当提高蒸馏深度即可制备满足GB/T 15180—2010技术要求的30^#硬质道路沥青，轻馏分油收率可增加8.1%；单独采用溶剂脱沥青工艺制备30^#硬质沥青，尽管能制备出满足指标的30^#硬质沥青，但脱沥青油收率较低，仅为6.6%～16.0%，经济效益较差；采用溶剂脱沥青+渣油（高标号沥青）调和工艺，可以制备出高低温性能较优的30^#硬质沥青，适宜的操作条件为：丁烷为溶剂，抽提塔塔温度107℃，抽提压力3.8MPa，剂油质量比为2.9，此时脱沥青油收率为41.2%，残炭小于8%，金属含量小于30μg/g，满足催化裂化进料要求；硬质脱油沥青软化点为105.4℃，针入度为0，适宜的调和软组分选择春风渣油和90^#沥青。沥青混合料试验表明，相比70^# A级道路沥青，30^#硬质沥青混合料具有良好的抗车辙性能和水稳定性能，基本能够达到改性沥青的效果，可将其用于沥青路面的中下面层提高路面的抗车辙能力。

关键词: 硬质道路沥青, 减压蒸馏, 溶剂脱沥青, 调和工艺, 沥青混合料

CLC Number:

TE624.5

TONG Yujun, SHEN Benxian, LIU Jichang. Preparation and evaluation of hard asphalts by different process[J]. Chemical Industry and Engineering Progress, 2017, 36(12): 4554-4561.

仝玉军, 沈本贤, 刘纪昌. 硬质道路沥青的不同制备技术[J]. 化工进展, 2017, 36(12): 4554-4561.

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