| 主权项 |
1. A hydrocarbon conversion process, comprising:
(a) providing a pyrolysis feedstock comprising ≧10.0 wt. % hydrocarbon based on the weight of the pyrolysis feedstock; (b) pyrolysing the pyrolysis feedstock to produce a pyrolysis effluent comprising tar and ≧1.0 wt. % of C2 unsaturates, based on the weight of the pyrolysis effluent; (c) separating at least a portion of the tar from the pyrolysis effluent, wherein the separated tar contains ≧90 wt. % of the pyrolysis effluent's molecules having an atmospheric boiling point of ≧290° C.; (d) providing a utility fluid, the utility fluid comprising 1-ring and/or 2-ring aromatics, in an amount ≧25.0 wt. % based on the weight of the utility fluid, the utility fluid having a final boiling point ≦430° C.; (e) providing a treat gas comprising molecular hydrogen; (f) hydroprocessing at least a portion of the separated tar in the presence of (i) the treat gas and (ii) the utility fluid under catalytic hydroprocessing conditions at a utility fluid:tar weight ratio in the range of 0.05 to 4.0, to produce a hydroprocessed product; (g) separating a product overhead mixture and a product bottoms mixture from the hydroprocessed product, wherein (i) the product overhead mixture comprises at least a portion of any un-reacted treat gas and (ii) the product bottoms mixture comprising hydroprocessed tar; (h) separating from the product bottoms mixture (i) a product vapor stream, (ii) a product liquid stream, and (iii) a side stream, the side stream having a final boiling point ≦430° C. and comprising 1-ring and/or 2-ring aromatics, in an amount ≧25.0 wt. % based on the weight of the side stream; and (i) conducting a portion of the side stream to step (d), wherein the utility fluid comprises ≧10.0 wt. % of the side stream, based on the weight of the utility fluid. |
