ZAWMET CATALYST RECYCLING

ZAWMET is a process for the continuous removal of contaminant metal from refinery FCCU (Fluid Catalyst Cracking Unit) by removal of metal from the catalyst. In general this is highly beneficial to the petroleum refining industry since metal build-up causes excess hydrogen production and drastically lowers product liquid yields. ZAWMET can be used by refiners to reduce contaminant metal concentrations in existing catalysts, instead of purchasing fresh catalyst at $1800/ton. FCCU operating costs will be reduced and spent catalyst minimized while production yields will be improved. In addition, by recycling catalyst instead of replacing it, an expensive and difficult hazardous waste disposal problem is avoided.

The most successful competitive process currently on the market is the Coastal Refining Company DEMET? process, which uses serial contact of catalyst with 1400° F hydrogen sulfide and chloride in high alloy pressure vessels followed by water wash and drying. Based on Eagle’s experience with other applications, it is anticipated that metal contaminants will be separated from the Zeolite and other catalysts in the form of sub-micron size particles that will be pneumatically conveyed by nitrogen vapor into a high-efficiency filters for periodic collection.