초록 ▼

The operation of a fluid catalytic cracking unit having a regenerator designed to completely combust carbon monoxide to carbon dioxide thermally is improved by circulating a trace amount of at least one metal of the group consisting of platinum, palladium, iridium, osmium, rhodium, ruthenium and rhe

The operation of a fluid catalytic cracking unit having a regenerator designed to completely combust carbon monoxide to carbon dioxide thermally is improved by circulating a trace amount of at least one metal of the group consisting of platinum, palladium, iridium, osmium, rhodium, ruthenium and rhenium with the circulating inventory of solid acidic cracking catalyst.

대표청구항 ▼

In a fluid catalytic cracking unit comprising a cracking zone operating in the absence of added hydrogen and a catalyst regeneration zone designed to substantially completely combust carbon monoxide to carbon dioxide thermally; which unit contains a circulating inventory of solid acidic cracking cat

In a fluid catalytic cracking unit comprising a cracking zone operating in the absence of added hydrogen and a catalyst regeneration zone designed to substantially completely combust carbon monoxide to carbon dioxide thermally; which unit contains a circulating inventory of solid acidic cracking catalyst, the improvement in the operation thereof, whereby the regenerator dense bed temperature is increased, which comprises: circulating with said catalyst a trace amount of at least one metal of the group consisting of platinum, palladium, iridium, osmium, rhodium, ruthenium and rhenium wherein the amount of said metal is from 0.01 to 50 ppm, based on total catalyst inventory.