US 10,889,765 B2
Process and apparatus for enhanced removal of contaminants in fluid catalytic cracking processes
Liang Chen, Houston, TX (US); Peter Loezos, Houston, TX (US); Rama Rao Marri, Houston, TX (US); Bryan Tomsula, Houston, TX (US); Jon A. Hood, Houston, TX (US); Hardik Singh, Houston, TX (US); Michael Dorsey, Houston, TX (US); and Justin Breckenridge, Houston, TX (US)
Assigned to Lummus Technology Inc., Bloomfield, NJ (US)
Filed by Lummus Technology Inc., Bloomfield, NJ (US)
Filed on Sep. 3, 2019, as Appl. No. 16/559,016.
Application 16/559,016 is a division of application No. 15/705,769, filed on Sep. 15, 2017, granted, now 10,450,514.
Claims priority of provisional application 62/395,724, filed on Sep. 16, 2016.
Prior Publication US 2019/0390117 A1, Dec. 26, 2019
Int. Cl. C10G 11/18 (2006.01); B01J 38/00 (2006.01); B01J 8/26 (2006.01); B01J 8/32 (2006.01); B01J 38/72 (2006.01); B01J 8/18 (2006.01); B01J 8/00 (2006.01)
CPC C10G 11/182 (2013.01) [B01J 8/0055 (2013.01); B01J 8/0065 (2013.01); B01J 8/1845 (2013.01); B01J 8/1854 (2013.01); B01J 8/1863 (2013.01); B01J 8/26 (2013.01); B01J 8/32 (2013.01); B01J 38/00 (2013.01); B01J 38/72 (2013.01); C10G 11/187 (2013.01); B01J 2208/0038 (2013.01); B01J 2208/00752 (2013.01); B01J 2208/00761 (2013.01); B01J 2208/00991 (2013.01); C10G 2300/70 (2013.01)] 20 Claims
OG exemplary drawing
 
7. A method of regenerating and removing contaminants from a catalyst, comprising:
feeding a catalyst comprising contaminants to a contaminant removal vessel;
feeding a contaminant trapping additive to the contaminant removal vessel, wherein the contaminant trapping additive has an average particle size greater than the catalyst and/or a density greater than the catalyst;
fluidizing the catalyst and the contaminant trapping additive with a lifting gas, contacting the catalyst with the contaminant trapping additive, and transferring contaminants from the catalyst to the contaminant trapping additive;
withdrawing from the contaminant removal vessel a first stream comprising lifting gas, contaminant trapping additive, and catalyst having a reduced amount of contaminants;
separating the contaminant trapping additive from the first stream, producing a recycle stream comprising contaminant trapping additive and a catalyst product stream comprising the lifting gas and the catalyst having a reduced amount of contaminants;
returning the contaminant trapping additive in the recycle stream to the contaminant removal vessel;
withdrawing from the contaminant removal vessel a second stream comprising contaminant trapping additive;
feeding the catalyst product stream to a catalyst regenerator; and
separating the catalyst from the lifting gas and regenerating the catalyst in the catalyst regenerator.