| 摘要 |
A broad embodiment of the present disclosure relates to a process for removal of at least 20%, 40% or 80% of the aromatics content of the fraction boiling above 190°C from a heavy hydrocarbonaceous feedstock comprising at least 30wt% aromatics, at least 3000 wt ppm nitrogen and at least 0.5wt% oxygen said method being carried out in a single stage in which no intermediate stream is withdrawn and comprising the steps of a. providing a hydrotreater feed by combining said heavy hydrocarbonaceous feedstock with excess hydrogen, providing a hydrotreater feed, b. providing a hydrotreated hydrocarbon product comprising less than 30 wt ppm nitrogen, less than 20 wt ppm nitrogen or less than 10 wt ppm nitrogen by hydrotreating said hydrotreater feed by contacting it with a material catalytically active in hydrotreatment under hydrotreatment conditions, c. providing a hydrotreated product either as the hydrotreated hydrocarbon product of step b or by fractionation as a fraction of said hydrotreated hydrocarbon product, with the associated benefit of a process providing a low level of nitrogen in the hydrocarbon product also providing a high potential for dearomatization. The aromatics content of the heavy hydrocarbonaceous feedstock may typically be between 30wt% aromatics and 90wt% aromatics. The nitrogen content of the heavy hydrocarbonaceous feedstock may typically be between 3000 wt ppm and10000 wt ppm. The oxygen content of the heavy hydrocarbonaceous feedstock may typically be between 0.5wt% and 10 wt%. The removal of aromatics content from the fraction boiling above 190°C may be from 20%, 40% or 80% to 99%or 100%. |
