Method and means for refinery gas plant operation
First Claim
1. A process for operating an unsaturated gas plant of a catalytic hydrocarbon conversion process, comprising;
- contacting acidic hydrocarbon feedstreams to a gas plant separator zone with lean acid absorbing absorbent in an absorption zone comprising at least one liquid absorber bed and one vapor absorber bed upstream of said separator zone, said feedstreams comprising unstabilized liquid gasoline and liquid and vapor output streams from liquid-vapor separator for inter-stage liquids and compressor effluents from said conversion process main fractionator, whereby said feedstreams are deacidified.
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Abstract
A process is disclosed for operating a refinery gas plant such as the unsaturated gas plant of a catalytic hydrocarbon conversion process that results in a reduction of the corrosive effect of acid gases on the gas plant vessels and equipment. The process comprises contacting acidic hydrocarbon feedstreams to an unsaturated gas plant separator zone with lean acid gas absorbing absorbent in an absorbtion zone comprising at least one liquid absorber bed and one vapor absorber bed. The liquid and vapor absorber beds are located upstream of the separator zone. The feedstreams to the gas plant comprise unstabilized, or wild, liquid gasoline and liquid and vapor output streams from the liquid-vapor separator for inter-stage wet gas compressor of the conversion process main fractionator. Accordingly, these feedstreams are deacidified before separation in the USGP deethanizer-absorber, sponge absorber, and debutanizer. This also eliminates the need for deacidification of the gas plant product stream.
18 Citations
13 Claims
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1. A process for operating an unsaturated gas plant of a catalytic hydrocarbon conversion process, comprising;
contacting acidic hydrocarbon feedstreams to a gas plant separator zone with lean acid absorbing absorbent in an absorption zone comprising at least one liquid absorber bed and one vapor absorber bed upstream of said separator zone, said feedstreams comprising unstabilized liquid gasoline and liquid and vapor output streams from liquid-vapor separator for inter-stage liquids and compressor effluents from said conversion process main fractionator, whereby said feedstreams are deacidified. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 13)
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9. A method for deacidifying acidic liquid and vapor hydrocarbon feedstreams to a catalytic hydrocarbon conversion process unsaturated gas plant, comprising:
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contacting said liquid feedstreams in an absorber bed with acid absorbing absorbent in countercurrent flow; withdrawing deacidified liquid feedstreams and passing said deacidified liquid feedstreams to said unsaturated gas plant deethanizer-debutanizer separator zone; contacting said vapor feedstream in an absorber bed with acid absorbing absorbent in countercurrent flow; withdrawing deacidified vapor feedstream and passing said deacidified vapor feedstream to said unsaturated gas plant deethanizer-debutanizer separator zone. - View Dependent Claims (10, 11, 12)
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Specification