07/20/2004 Archived Entry: "CAER Researchers' Patent Application Accepted"

Drs. James K. Neathery and Burtron Davis have recently received notice that the U.S. Patent Office has issued a patent for a filtration method developed at the CAER. The patent (US 6,762,209) is titled "Bubble Column Apparatus for Separating Wax from Catalyst Slurry." The abstract for the patent reads as follows:

"Novel methods and devices for production of liquid hydrocarbon products from gaseous reactants are disclosed. In one aspect, a method for separating a liquid hydrocarbon, typically a wax, from a catalyst containing slurry is provided, comprising passing the slurry through at least one downcomer extending from an overhead separation chamber and discharging into the bottom of a slurry bubble column reactor. The downcomer includes a cross-flow filtration element for separating a substantially particle-free liquid hydrocarbon for downstream processing. In another aspect, a method for promoting plug-flow movement in a recirculating slurry bubble column reactor is provided, comprising discharging the recirculating slurry into the reactor through at least one downcomer which terminates near the bottom of the reactor. Devices for accomplishing the above methods are also provided."

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