초록 ▼

An improved delayed coking process using an improved method for adding antifoam materials to the delayed coking process. The process is directed to injecting a polysiloxane antifoam material in mixture with an inert gas in the absence or substantial absence of steam and wherein this mixture is heate

An improved delayed coking process using an improved method for adding antifoam materials to the delayed coking process. The process is directed to injecting a polysiloxane antifoam material in mixture with an inert gas in the absence or substantial absence of steam and wherein this mixture is heated and thereafter injected into a delayed coking drum. The process allows improved use of antifoam materials and prevents downstream contamination of process units with silica materials which can be broken down when the polysiloxane antifoam material is contacted with large quantities of steam within the coking drum.

대표청구항 ▼

In a delayed coking process wherein a heavy feed is passed into a coking drum at coking conditions including a temperature above about 800°F., to form solid coke and vapor products, wherein foaming of hydrocarbons in the coke drum is inhibited by addition of an effective amount of a polysiloxane to

In a delayed coking process wherein a heavy feed is passed into a coking drum at coking conditions including a temperature above about 800°F., to form solid coke and vapor products, wherein foaming of hydrocarbons in the coke drum is inhibited by addition of an effective amount of a polysiloxane to the hydrocarbons wherein an improvement comprises adding to the upper portion of the coke drum a mixture comprising polysiloxane and an inert gas wherein the mixture has a substantial absence of steam to substantially reduce thermal degradation of said polysiloxane and is heated up to at least about 400°F. prior to contacting any contents of the coking drum.