Patent
Method and system for regenerating fluidizable catalyst particles
Benjamin Gross,Hartley Owen +1 more
TLDR
In this paper, a hydrocarbon conversion-catalyst regeneration operation is described which relies upon a dense fluid catalyst bed superimposed by a dispersed catalyst phase operation to effect elevated temperature regeneration of the catalyst providing low CO levels less than 0.15 mol percent in the flue gas by mixing regenerated catalyst with spent catalyst to obtain an initial mix temperature of at least 1175° F before contact with oxygen containing regeneration gas.Abstract:
A hydrocarbon conversion-catalyst regeneration operation is described which relies upon a dense fluid catalyst bed superimposed by a dispersed catalyst phase operation to effect elevated temperature regeneration of the catalyst providing low CO levels less than 0.15 mol percent in the flue gas by mixing regenerated catalyst with spent catalyst to obtain an initial mix temperature of at least 1175° F. before contact with oxygen containing regeneration gas. The ratio of regenerated to spent catalyst is restricted to within the range of 0.5 to 1.5 and the oxygen content through the dense and dispersed catalyst phase is selected to provide a discharged dispersed catalyst phase temperature of at least 1350° F.read more
Citations
More filters
Patent
Catalytic cracking with reduced emission of noxious gases
TL;DR: In this article, small amounts of a promoter comprising palladium and ruthenium enhance the combustion of carbon monoxide within the regeneration zone of a catalytic cracking unit without simultaneously causing the formation of excessive amounts of nitrogen oxides.
Patent
FCC Reactor with a downflow reactor riser
Benjamin Gross,Michael P. Ramage +1 more
TL;DR: In this paper, a downflow riser was proposed to ensure uniform distribution of the catalyst throughout the feed, decrease contact time of the catalytic catalyst with the feed and decrease the amount of coke made in the process.
Patent
Cracking with short contact time and high temperatures
Leonce F. Castagnos,Roy E. Pratt +1 more
TL;DR: In this article, a method and apparatus for catalytic conversion of hydrocarbon feedstocks and regeneration of coked catalyst resulting from the hydrocarbon conversion reaction in which the catalyst regeneration is carried out in a combination of dense phase fluidized bed, an entrained phase regeneration zone and a second dense phase liquidized bed is described, where the reaction time and temperature and the regenerator temperature may be separately varied to provide and maintain optimum conversion conditions.
Patent
Fluid catalyst regeneration process and apparatus
TL;DR: In this paper, a catalyst regeneration process and apparatus for the oxidative removal of coke from a coke contaminated fluid catalyst is described, which comprises a high temperature coke combustion zone, a catalyst disengagement zone and an external heat removal zone comprising a shell and tube heat exchanger.
Patent
Process for control of multistage catalyst regeneration with partial co combustion
Hartley Owen,Paul H. Schipper +1 more
TL;DR: In this paper, a modified high efficiency catalyst regenerator, with a fast fluidized bed coke combustor, dilute phase transport riser, and second fluidized ground regenerates the catalyst in at least two stages.
References
More filters
Patent
Method for catalytic cracking of residual oils
TL;DR: In this paper, a method and system for the fluid catalytic cracking of residual and lower boiling oil streams is described which relies upon the residual oil as a quench medium for limiting the conversion of a recycle oil product thereof in a riser conversion zone.
Patent
Method and system for controlling the activity of a crystalline zeolite cracking catalyst
TL;DR: In this paper, a method and system for cracking hydrocarbons and regeneration of the catalyst is described with particular emphasis directed to partially restoring the activity of the catalysts after an initial hydrocarbon conversion use by heat soaking the catalyst at an elevated temperature before use in a second hydrocar conversion zone.
Patent
Fluidized catalyst regeneration by oxidation in a dense phase bed and a dilute phase transport riser
Laurence O Stine,Algie J Conner +1 more
TL;DR: In this paper, a process in which spent catalyst is regenerated with or without the complete combustion of CO in a regeneration zone comprising a first dense bed, a dilute phase transport riser and a second dense bed.
Patent
Fluid catalytic cracking process with substantially complete combustion of carbon monoxide during regeneration of catalyst
TL;DR: An improved fluid catalytic cracking process providing improved product yield and selectivity employs a regenerated hydrocarbon conversion catalyst having improved activity and a low level of residual coke, desirably less than 0.05 wt. % on catalyst as discussed by the authors.
Patent
Conversion of hydrocarbons with a dual cracking component catalyst comprising zsm-5 type material
A Schwartz,Veigh H Mc +1 more
TL;DR: In this article, a method and system for converting hydrocarbons with a dual cracking component comprising ZSM-5 is described, where the products of a large pore size cracking catalyst are passed into a dense fluid bed of catalyst comprising Z SM-5 catalyst for the production of aromatics and/or olefins suitable for alkylation with a paraffin.