Delayed coking process

Details Delayed coking process Delayed coking process

1985-04-01

1987-04-28

Metz, Andrew H.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208 56, 208107, C10G 914

Patent

active

046612416

ABSTRACT:
A delayed coking process having improved liquid yield and liquid product distribution relative to coke yield is characterized by the absence of heavy recycle. The coker feedstock is heated in the coker furnace and led to the coker drums where coking takes place and the vaporous effluence are passed to a fractionator from which the heavy gas oil fraction is removed as product. Process heat is conserved by indirect heat exchange of the feedstock with the coking products prior to the feedstock entering the coking furnace. A further improvement in liquid yield and selectivity is obtained by adding a solvent or diluent to the feedstock and this may be either a hydrocarbon fraction such as a coker distillate, a light gas oil or another fraction having an end point below 450.degree. C.; in addition, it may be used in conjunction with a reactive or nonreactive gas such as nitrogen, steam, hydrogen or hydrogen sulfide.

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