The yield of coke in a delayed coking process is minimized by adding to the coker feedstock a recycle material comprising, in aadition to conventional heavy recycle, a distiilate hydrocarbon material having a boiling range generally lower than that of the heavy recycle. The distillate hydrocarbon material may be obtained from a coker fractionator. The minimization of coke yield means that desired products other than coke are obtained in higher yield.
展开▼
