US 12,264,122 B2
Tail gas utilization for mixed alcohols production
Richard Denham Ridley, Jr., Berthoud, CO (US); and Michael Emory Pardun, Denver, CO (US)
Assigned to Standard Alcohol Company of America, Inc., Denver, CO (US)
Filed by Standard Alcohol Company of America, Inc., Denver, CO (US)
Filed on Dec. 14, 2023, as Appl. No. 18/540,167.
Application 18/540,167 is a continuation of application No. 17/521,829, filed on Nov. 8, 2021, granted, now 11,845,712.
Claims priority of provisional application 63/112,237, filed on Nov. 11, 2020.
Prior Publication US 2024/0109825 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 29/00 (2006.01); B01D 53/00 (2006.01); B01D 53/047 (2006.01); B01D 53/14 (2006.01); B01J 27/04 (2006.01)
CPC C07C 29/00 (2013.01) [B01D 53/002 (2013.01); B01D 53/047 (2013.01); B01D 53/1475 (2013.01); B01D 53/1493 (2013.01); B01J 27/04 (2013.01); B01D 2252/20405 (2013.01); B01D 2252/20431 (2013.01); B01D 2252/20489 (2013.01); B01D 2253/1122 (2013.01); B01D 2257/102 (2013.01); B01D 2257/108 (2013.01); B01D 2257/304 (2013.01); B01D 2257/504 (2013.01); B01D 2257/7025 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A process for producing and using a clean syngas product, said process comprising:
(a) obtaining a tail-gas stream from a methane-to-syngas unit, wherein said tail-gas stream comprises CO2, CO, H2, and CH4;
(b) compressing said tail-gas stream;
(c) separating said tail-gas stream into at least a syngas stream, a CO2-rich stream, and a CH4-rich stream;
(d) recovering said syngas stream as a clean syngas product;
(e) converting said clean syngas product to a final product selected from the group consisting of alcohols, aldehydes, olefins, oxygenates, paraffins, linear or branched hydrocarbons, diesel fuel, gasoline, jet fuel, waxes, methane, dimethyl ether, acetic acid, formaldehyde, energy, and combinations thereof, wherein a syngas-utilization off-gas is generated in connection with said converting said clean syngas product to said final product; and
(f) recycling said syngas-utilization off-gas, or a treated form thereof, to step (c).