US 12,312,289 B2
Dividing wall column in alkylation process for reactor recycle and product separation
Bhari Bhujan Singh, Slough (GB); and Ian Charles Elgey, Marlow (GB)
Assigned to Kellogg Brown & Root LLC, Houston, TX (US)
Filed by KELLOGG BROWN & ROOT LLC, Houston, TX (US)
Filed on Dec. 22, 2022, as Appl. No. 18/086,925.
Application 18/086,925 is a division of application No. 17/126,292, filed on Dec. 18, 2020, granted, now 11,578,017.
Claims priority of provisional application 62/950,727, filed on Dec. 19, 2019.
Prior Publication US 2023/0127377 A1, Apr. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 2/62 (2006.01); B01D 3/00 (2006.01); B01D 3/14 (2006.01); C07C 2/58 (2006.01); C07C 7/04 (2006.01); C07C 9/12 (2006.01)
CPC C07C 2/62 (2013.01) [B01D 3/007 (2013.01); B01D 3/141 (2013.01); C07C 2/58 (2013.01); C07C 7/04 (2013.01); C07C 9/12 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An alkylation process comprising:
feeding an olefin stream and a make-up iso-butane to an alkylation reaction/regeneration section to produce an alkylate reactor effluent;
feeding the alkylate reactor effluent and an additional make-up iso-butane to a dividing wall column (DWC) to separate the alkylate reactor effluent into a plurality of DWC effluent streams comprising:
an iso-butane recycle stream,
a n-butane product stream, and
an alkylate product stream; and
recycling at least a portion of the iso-butane recycle stream to the alkylation reaction/regeneration section.