improvement in the process of regenerating lizzatori minds, conversion of hydrocarbons

摘要

1439532 Catalyst regeneration U O P INC 29 May 1973 [30 May 1972 (2) 18 Dec 1972] 25366/73 Heading B1F In a process for regenerating spent catalyst containing coke in a dense phase fluidised bed with fresh regeneration gas containing free oxygen in a regeneration zone from which spent regeneration gas is removed, controlled afterburning of the carbon monoxide to carbon dioxide is substantially completed in the bed, the afterburning being initiated by setting up afterburning conditions in the dense bed and being controlled by monitoring a parometer selected from a temperature in the regeneration zone, an average temperature in the regeneration zone, a temperature differential in the regeneration zone and the quantity of free oxygen in the spent regeneration gas, and the inflow of the fresh regeneration gas is regulated to maintain the monitored parometer substantially constant. The dense bed temperature may be maintained within the range of 650-800‹C, the inflow of fresh regeneration gas may be regulated to maintain the free oxygen content of the spent regeneration gas constant within the range between 0.1 and 20 mole %, and the temperature difference between the dense bed and the dilute phase above the bed may be maintained at a temperature difference less than 30‹C.