Delayed coking process with hydrotreated recycle and graphitized products thereof

摘要

A delayed coking process in which a liquid hydrocarbonaceous feedstock is heated in a coker furnace (13) and then fed to a delayed coking drum (15), and in which overhead vapors from said coking drum are passed to a coker fractionator (11) where they are separated into light hydrocarbon products and recycle gas oil, and in which said recycle gas oil is combined with said feedstock and returned to said coking drum (15), is characterised in that said recycle gas oil is hydrotreated (20) after being separated from said light hydrocarbon products and prior to being combined with said feedstock, whereby the resulting delayed coke is a premium coke, having a particularly low coefficient of thermal expression.;The premium coke product may be graphitised and formed into shaped articles.