In relation to the constant requirement for reduction of sulfur level and low demand for fuel oil, this study presents an approach for utilization of unconverted vacuum tower bottom (UVTB) from the ebullated bed hydrocracking process, H-Oil technology, in bitumen production. The kinetic study shows a slower softening point increase for crude blend 70% Urals and 30% Middle Eastern than other feeds in the air-blowing process. Also, penetration values for straight run vacuum residue feeds decrease quicker than the increase in their softening point values. UVTB softening point increase at high temperature is faster and penetration decrease is slower than LNB SRVR. Air blowing is shown to improve the penetration index of UVTB to a greater extent than the SRVR one. The bottleneck of this new application of UVTB is its low resistance to hardening, determined by using a rolling thin film oven (RTFO), which limits its quantity up to 20–30% in blends.

中文翻译：

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H油沸腾床残油加氢裂化生产未转化真空塔底沥青的可行性

关于降低硫含量的持续要求和对燃油的低需求，本研究提出了一种在沥青生产中利用来自沸腾床加氢裂化工艺（H油技术）的未转化真空塔底（UVTB）的方法。动力学研究表明，在空气吹炼过程中，与其他原料相比，70％乌拉尔和30％中东原油混合物的软化点增加速度较慢。同样，直馏真空渣油进料的渗透率下降速度快于其软化点值的上升速度。与LNB SRVR相比，高温下UVTB软化点的增加更快，而渗透率的降低则更慢。结果表明，与SRVR相比，吹气可以更大程度地提高UVTB的渗透指数。UVTB这项新应用的瓶颈是其对硬化的抵抗力低，