Fluid coking and gasification process

Claim 2

In a fluid coking process comprising the step of reacting a preheated carbonaceous material feedstock in a coking zone containing a bed of fluidized solids maintained in a fluidized state by the introduction of a fluidizing gas, at fluid coking conditions, to form a coking zone vapor phase conversion product and coke, the improvement which comprises introducing into said coking zone hot light hydrocarbons in an amount and at a temperature sufficient to provide substantially all of the heat requirement of said coking zone above that provided by the preheated feedstock, in the absence of recycled hot solids.

Claim 3

The process of claim 1 wherein said hot light hydrocarbons are introduced into said coking zone at a temperature from about 100 to about 400 Fahrenheit degrees in excess of the actual operating temperature of said coking zone.

Claim 4

In the process of claim 1 wherein the coking zone vapor phase product is separated into fractions including a light hydrocarbon fraction, the further improvement which comprises recycling said light hydrocarbon fraction to said coking zone.

Claim 5

The process of claim 3 wherein said light hydrocarbon fraction is reheated prior to being recycled to said coking zone.

Claim 6

The process of claim 1 wherein said light hydrocarbons are selected from the group consisting of C 1 to C 4 hydrocarbon gases, C 5 to C 8 normally liquid hydrocarbons, hydrocarbon mixtures boiling at atmospheric pressure from about 50° F. to about 300° F. and mixtures thereof.

Claim 7

The process of claim 1 wherein said hot light hydrocarbons are normally liquid hydrocarbons.

Claim 8

The process of claim 1 wherein said coking zone temperature ranges from about 850° to about 1100° F.

Claim 9

In an integrated coking and gasification process comprising the steps of: (a) reacting a preheated carbonaceous material feedstock in a coking zone containing a bed of fluidized solids maintained in fluidized state by the introduction of a fluidizing gas, at fluid coking conditions, to form a coking zone vapor phase conversion product and coke, said coke depositing on said fluidized solids; (b) contacting a portion of said solids with steam and a molecular oxygen-containing gas in a fluid bed gasification zone maintained at gasification conditions to produce a gaseous product, the improvement which comprises introducing into said coking zone hot light hydrocarbons in an amount and at a temperature sufficient to provide substantially all of the heat requirement of said coking zone above that provided by the preheated feedstock, in the absence of recycled hot solids.

Claim 10

In an integrated coking and gasification process comprising the steps of: (a) reacting a preheated carbonaceous material feedstock in a coking zone containing a bed of fluidized solids maintained in fluidized state by the introduction of a fluidizing gas, at fluid coking conditions, to form a coking zone vapor phase conversion product and coke, said coke depositing on said fluidized solids; (b) contacting a portion of said solids with steam and a molecular oxygen-containing gas in a fluid bed gasification zone maintained at gasification conditions to produce a gaseous product, the improvement which comprises introducing into said coking zone hot light hydrocarbons in an amount and at a temperature sufficient to provide substantially all of the heat requirement of said coking zone above that provided by the preheated feedstock, in the absence of recycled hot solids.

Claim 11

The process of claim 8 wherein said hot light hydrocarbons are introduced into said coking zone at a temperature from about 100 to about 400 Fahrenheit degrees in excess of the actual operating temperature of said coking zone.

Claim 12

In the process of claim 8 wherein the coking zone vapor phase product is separated into fractions including a light hydrocarbon fraction, the further improvement which comprises recycling said light hydrocarbon fraction to the said coking zone.

Claim 13

The process of claim 10 wherein said light hydrocarbon fraction is reheated prior to being recycled to said coking zone.

Claim 14

The process of claim 11 wherein said light hydrocarbon fraction is reheated by heat exchange with one of the product streams prior to being recycled into said coking zone.

Claim 15

The process of claim 8 wherein said light hydrocarbons are selected from the group consisting of C 1 to C 4 hydrocarbon gases, C 5 to C 8 normally liquid hydrocarbons, hydrocarbon mixtures boiling, at atmospheric pressure, from about 50° F. to about 300° F. and mixtures thereof.

Claim 16

In the process of claim 8, the additional steps which comprise passing a portion of said solids from said coking zone and passing the gaseous product of said gasification zone to an additional fluidized bed zone wherein said portion of solids is heated by contact with said gaseous product and passing a portion of solids from said additional fluid bed zone to said gasification zone.

Claim 17

In the process of claim 8, the additional steps which comprise passing a portion of the solids from the gasification zone and a portion of the solids from said coking zone to an additional fluidized bed zone to heat the coking zone solids, and passing a portion of heated solids from said additional fluidized bed zone to said gasification zone.

Claim 18

The process of claim 8 wherein said coking zone is maintained at a temperature ranging from about 850° F. to about 1100° F. and at a pressure ranging from about 5 to about 200 psig.

Claim 19

The process of claim 8 wherein said gasification zone is maintained at a temperature ranging from about 1400° F. to about 2000° F. and at a pressure ranging from about 5 to about 200 psig.

Claim 20

The process of claim 8 wherein said gasification zone is maintained at a temperature ranging from about 1600° F. to about 1800° F.

Claim 21

The process of claim 14 wherein said additional fluidized bed zone is maintained at a temperature ranging from about 1200° F. to about 1600° F. and at a pressure ranging from about 5 to about 200 psig.

Claim 22

The process of claim 8 wherein said hot light hydrocarbons are introduced into said coking zone as sole added fluidizing gas.