초록 ▼

The liquid yield of a delayed coking process is improved by controlling the temperature of the vapor space above the carbonizing mass so that that incipient coking and cracking of the vapors is reduced. The temperature is preferably controlled by introducing a quenching liquid into the vapor space;

The liquid yield of a delayed coking process is improved by controlling the temperature of the vapor space above the carbonizing mass so that that incipient coking and cracking of the vapors is reduced. The temperature is preferably controlled by introducing a quenching liquid into the vapor space; suitable liquids for this purpose include water, coker feedstock and the bottoms fraction derived from the coker products.

대표청구항 ▼

In a delayed coking process in which a heated heavy hydrocarbon feedstock is introduced into the bottom of a coker drum to form a carbonizing mass at a temperature of at least 450°C. in which the delayed coking reaction occurs to form coke and gas and vapor phase products which are removed from the

In a delayed coking process in which a heated heavy hydrocarbon feedstock is introduced into the bottom of a coker drum to form a carbonizing mass at a temperature of at least 450°C. in which the delayed coking reaction occurs to form coke and gas and vapor phase products which are removed from the vapor space above the carbonizing mass through an outlet the improvement which comprises: maintaining the temperature of the vapor space substantially below 450°C. by introducing a quenching liquid into the vapor space of the coker drum in the region of the outlet, whereby the temperature of vapor space is maintained at its lowest in the region of the outlet and at its highest in the region of the interface with the carbonizing mass and liquid products are obtained in improved yield.