US 12,403,421 B2
Methods for absorbing a targeted compound from a gas stream for subsequent processing or use
Stephen R. Temple, Santa Cruz, CA (US); and Bjorn Temple, Santa Cruz, CA (US)
Filed by Stephen R. Temple, Santa Cruz, CA (US); and Bjorn Temple, Santa Cruz, CA (US)
Filed on Jan. 7, 2022, as Appl. No. 17/570,633.
Application 17/570,633 is a continuation of application No. 17/566,961, filed on Dec. 31, 2021, granted, now 11,458,436.
Prior Publication US 2023/0211280 A1, Jul. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/14 (2006.01); B01D 53/00 (2006.01); B01D 53/26 (2006.01); C05C 3/00 (2006.01); C05G 5/23 (2020.01)
CPC B01D 53/1418 (2013.01) [B01D 53/002 (2013.01); B01D 53/1406 (2013.01); B01D 53/1456 (2013.01); B01D 53/1493 (2013.01); B01D 53/265 (2013.01); C05C 3/00 (2013.01); C05G 5/23 (2020.02)] 12 Claims
OG exemplary drawing
 
1. A method for removing a chemical compound from a waste gas stream to prepare the waste gas stream for further processing, comprising:
feeding a waste gas stream to a gas/liquid contactor, wherein the waste gas stream comprises a targeted chemical compound to be removed from the waste gas stream; and
absorbing the targeted chemical compound from the waste gas stream into a scrubbing solution in the gas/liquid contactor, thereby producing an exit gas stream from the gas/liquid contactor; wherein said absorbing is performed prior to any condensing of the waste gas stream;
condensing the exit gas stream from the gas/liquid contactor to produce a condensed gas stream for further processing;
after said condensing, optionally combining a second waste gas stream comprising the targeted chemical compound with the condensed gas stream;
removing a portion of solid matter from the condensed gas stream;
after said removing, scrubbing the condensed gas stream with an alkaline scrubbing solution to remove a portion of an acidic gaseous compound from the condensed gas stream;
after said scrubbing the condensed gas stream with the alkaline scrubbing solution, scrubbing the condensed gas stream with an acidic scrubbing solution to remove a portion of any of the targeted chemical compound in the condensed gas stream; and
after said scrubbing the condensed gas stream with an acidic scrubbing solution, discharging the condensed gas stream.