Optimization of vacuum resid solvent deasphalting to produce bright stock and hard asphalt

To prepare bright stock (BS) and 30# hard asphalt simultaneously, propane solvent deasphalting (SDA) of Oman vacuum residue was optimized. Result showed the optimal process conditions were as follows: extraction tower top temperature of 64°C, settling tower top temperature of 74°C, extraction pressure of 3.35 MPa, solvent ratio of 5. Compared with SDA of Oman VR to prepare bright stock and 70# asphalt, the yields of light deasphalted oil (LDAO) and heavy deasphalted oil (HDAO) were 26.8% and 24.7%, and increased by 1.7% and 5.2% respectively; carbon residue of LDAO was less than 1.2%, conformed to the feed requirement of furfural refining to produce bright stock. The yield of DOA was 48.5%, and DOA could be directly used to produce 30# hard asphalt. The PG grade of 30# asphalt was PG 76–22 and the 30# asphalt mixture had high rut dynamic stability and water resistant stability. HDAO could be used as feedstock of catalytic cracking and light yield oil (gasoline and diesel) was 65.99%.     

Preparation and evaluation of 30# hard grade asphalt

The preparation and evaluation of 30# hard grade asphalt by blending softening point hard deoil asphalt with several soft components were investigated. The results showed that the properties and proportions of blending soft components had a great influence on the properties of 30# asphalt. Chunfeng 70# asphalt and Maoming deoil asphalt were more suitable as blending soft components and their blended asphalt met the technical requirements of GB/T 15180-2010 when the proportion of hard deoil asphalt were 6–12% and 8–16%, respectively. PG grade results indicated that dynamic modulus of 30# asphalts at high temperature increased significantly, and antirutting ability was also improved notably, while the bending resistant ability at low temperature was slightly inferior to the high-grade asphalt. The results of mix performance tests showed that 30# hard grade asphalt had excellent anti–high-temperature deformation ability and preferable water stability compared with high-grade asphalts.     

阿曼减渣溶剂脱沥青制备光亮油料和30#硬质道路沥青

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%。     

溶剂脱沥青装置加工渣油分析

利用溶剂脱沥青装置加工处理高密度的阿曼和巴士拉混合纯渣油,在适宜的操作条件下,考察了装置的最大处理量和脱沥青油的收率,分析了脱沥青油和脱油沥青的产品性质.结果表明:溶剂脱沥青装置处理纯渣油时,由于纯渣油物性极差,导致脱沥青油收率为30.78%,脱油沥青收率为69.22%,装置能耗相比加工原混合原料时增加了28.38%.     

基于分子管理的渣油掺炼煤焦油常压溶剂脱沥青效果

考察了渣油（VR）掺炼煤焦油（CT）溶剂脱沥青过程效果的变化,优化了实验条件。结果表明,在最佳实验条件[萃取温度30.0℃,溶剂比6∶1（体积/质量）]下,当VR掺炼质量分数为10%的CT时,脱沥青油（DAO）收率较未掺炼者提高2.02个百分点,镍和钒总含量下降5μg/g,硫含量略有下降,氮含量基本不变。VR掺炼CT后黏度降低,胶体稳定性下降。实验所得脱油沥青为硬沥青,采用外掺油浆对其进行调和,随油浆加入质量分数的增加,调和沥青的延度、针入度增大,软化点降低,沥青性质得到改善。     

溶剂脱沥青胶质、半沥青调合减压渣油生产重交通道路沥青

介绍了中石化广州分公司2009重交沥青的生产情况,简要介绍溶剂脱沥青生产工艺及调合流程,列出该装置生产及调合渣油的主要油种及渣油性质,分析了溶剂脱沥青工艺生产及调合的主要工艺参数,列出了应用该工艺生产出的重交沥青的产品性质,结果表明：以溶剂脱沥青装置产出的胶质、半沥青调合减压渣油生产出了符合GB／T15180—2000标准的70号和90号重交道路沥青。     

A－30硬质沥青及其混合料性能试验研究

A－30硬质沥青是指粘稠度相对较大的基质沥青，具有针入度小、粘稠度大、劲度大、软化点高、延度小的特点，其高温性能优良，温度敏感性好，低温性能略差。针对硬质沥青及其混合料的性能指标，尤其是高温性能、低温性能和疲劳性能，同时与石油沥青A－70、SBS改性沥青进行对比试验研究，以全面了解硬质沥青的使用性能，为硬质沥青的应用提供依据，也为夏季炎热地区、重轴截道路和长大纵坡路段的高等级公路沥青路面建设提供参考。     

改变丙烷脱沥青工艺条件生产C级道路沥青

以丙烷脱沥青的脱油沥青与减压侧线抽出油调合生产的道路沥青蜡含量在4%～5%之间,有时不能满足交通部JTG F40-2004《公路沥青路面施工技术规范》中C级道路沥青蜡含量不大于4.5%的技术要求.通过在丙烷溶剂中搀兑C4溶剂,可明显降低脱油沥青的蜡含量.掺兑C4溶剂后的脱油沥青与减压侧线抽出油调合的沥青能够满足JTG F40中C级道路沥青蜡含量的要求.掺兑C4溶剂在改善脱油沥青质量的同时也得到了高收率的脱沥青油,做为催化原料可产生较大的经济效益.