Abstract:

In this paper, the influence of ultrasonic treatment on the stability of residual was analyzed by measuring the colloidal stability parameters and initial flocculation point. It was found that ultrasonic treatmentcan change the contents of SARA(saturates, aromatics, resin, and asphaltene) and improve the stability of the residue colloid system. With the increase of ultrasonic treatment time, the colloidal stability parameters of residual oil firstly increased and then decreased, and the initial flocculation point changed in the same trend and 20 min is the optimal time for residue ultrasonic treatment. Compared to the feedstock, the saturated and asphaltene content decreased 3.26 percentage points and 4.72 percentage points, and the aromatic and resin increased 4.25 percentage points and 3.30 percentage points in residue after ultrasonic treatment for 20 min. It was observed by optical microscope that the dispersivity of asphaltene micelle structure was enhanced obviously after ultrasonic treatment, which was beneficial to improve the stability of the system.

Key words: ultrasonic treatment, vacuum residue, colloidal, stability, initial flocculation point, asphaltene, dispersivity

摘要：

通过测定渣油的胶体稳定性参数和初始絮凝点，分析了超声处理对渣油胶体体系稳定性的影响。结果表明：超声处理可以改变渣油的四组分组成，改善渣油胶体体系的稳定性，随超声处理时间延长，渣油的胶体稳定性参数先升高后降低，初始絮凝点同趋变化，超声处理时间为20 min时效果最优，与原料油相比，此时超声后渣油的饱和分和沥青质质量分数分别减少了3.26,4.72百分点，芳香分和胶质质量分数分别增加了4.25,3.30百分点。通过光学显微镜照片发现超声处理后沥青质胶团的分散性明显增强，有利于体系稳定性的提高。

关键词: 超声处理, 减压渣油, 胶体, 稳定性, 初始絮凝点, 沥青质, 分散状态