Slurry hydrocarbon synthesis with downcomer fed product filtration (LAW552)
First Claim
1. A slurry hydrocarbon synthesis process for forming hydrocarbons comprising:
- (a) reacting a synthesis gas comprising a mixture of H2 and CO, in the presence of a solid, particulate hydrocarbon synthesis catalyst in a slurry body comprising said catalyst and gas bubbles in a hydrocarbon slurry liquid under reaction conditions effective to form hydrocarbons, at least a portion of which are liquid at said reaction conditions, wherein said slurry hydrocarbon liquid comprises said liquid hydrocarbons;
(b) passing a portion of said slurry from said slurry body through a gas disengaging zone immersed in said slurry body to form a gas reduced slurry;
(c) passing said gas reduced slurry from said gas disengaging zone through a downcomer and into a filtration zone under conditions of high flow;
(d) contacting said gas reduced slurry with filtration means in said filtration zone under said high flow conditions to separate a portion of said hydrocarbon liquid from said slurry as a filtrate and produce a hydrocarbon reduced slurry, and(e) passing hydrocarbon reduced slurry back into said slurry body.
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Accused Products
Abstract
Hydrocarbon liquid products are filtered and removed from a three phase hydrocarbon synthesis slurry comprising gas bubbles and particulate catalyst solids in a hydrocarbon liquid, by circulating the slurry through a gas disengaging downcomer immersed in the slurry to a filtration zone external or internal of the reactor, and then back into the slurry in the reactor. The gas disengagement densifies the slurry which is passed across the filtration surface under high flow conditions, to reduce solids build up on the filter as filter cake. Circulation through the filtration zone occurs by gravity and hydrostatics due to slurry density differences. The downcomer may also be a gas and solids reducing downcomer.
60 Citations
15 Claims
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1. A slurry hydrocarbon synthesis process for forming hydrocarbons comprising:
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(a) reacting a synthesis gas comprising a mixture of H2 and CO, in the presence of a solid, particulate hydrocarbon synthesis catalyst in a slurry body comprising said catalyst and gas bubbles in a hydrocarbon slurry liquid under reaction conditions effective to form hydrocarbons, at least a portion of which are liquid at said reaction conditions, wherein said slurry hydrocarbon liquid comprises said liquid hydrocarbons; (b) passing a portion of said slurry from said slurry body through a gas disengaging zone immersed in said slurry body to form a gas reduced slurry; (c) passing said gas reduced slurry from said gas disengaging zone through a downcomer and into a filtration zone under conditions of high flow; (d) contacting said gas reduced slurry with filtration means in said filtration zone under said high flow conditions to separate a portion of said hydrocarbon liquid from said slurry as a filtrate and produce a hydrocarbon reduced slurry, and (e) passing hydrocarbon reduced slurry back into said slurry body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification