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。

Solvent deasphalting process of vacuum residue blended with coal tar based on the molecular management by atmospheric extraction

The effect of solvent deasphalting process of vacuum residue(VR) blended with coal tar(CT) was studied and the experimental conditions were optimized.The results showed that under the conditions of extraction temperature 30.0℃ and solvent ratio 6∶1(volume/mass),the yield of deasphalted oil from VR blended with mass fraction of CT of 10% was 2.02 percentage points higher than that from VR,the content of Ni and V decreased by 5μg/g,sulfur content reduced slightly,and the content of nitrogen unchanged litter.The viscosity and colloid stability of VR declined when VR blended with CT.The deoiled asphalt obtained from the experiments was hard,which was modified by slurry oil.The penetration and ductility of the modified asphalt increased,land softening point decreased with increasing slurry oil.The modified asphalt was improved significantly.