Separation system
AssigneeExxonMobil Chemical Patents Inc.
InventorsJohn R. Porter, Dana L. Pilliod
Life of this patent
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Abstract
A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system is described. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. In embodiments the conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. The improvement is more efficient use of the desorbent. In embodiments the process achieves improvements in one or more of efficiency of adsorption separation, capacity of adsorption apparatus systems, and purity of product attainable by adsorption process.
Claims11
In a process for separating a product from at least one multicomponent feed by simulated countercurrent adsorptive separation, comprising at least two flushing steps to increase purity of the final extract, including a step of obtaining a first flush output and providing a second flush input, the improvement comprising using at least a portion of the first flush output as at least a portion of the second flush input.
In a process for separating a product comprising paraxylene from at least one feed comprising C8 aromatic hydrocarbons including paraxylene, metaxylene, orthoxylene and optionally ethylbenzene by simulated countercurrent adsorptive separation, said process comprising at least two flushing steps to increase the concentration of paraxylene in said product, including a step of obtaining a first flush output and providing a second flush input, the improvement comprising using at least a portion of the first flush output as at least a portion of the second flush input.
Dependencies are inferred from the claim text.