US 20150093314Al  c19)  United States  c12)  Patent Application Publication  Critchfield et al.  c10)  Pub. No.: US 2015/0093314 Al  (43)  Pub. Date:  Apr. 2, 2015  (54)  ABSORBENT COMPOSITION FOR THE  SELECTIVE ABSORTPTION OF HYDROGEN  SULFIDE AND PROCESS OF USE THEREOF  (71)  Applicant:  SHELL OIL COMPANY,  Houston, TX  (US)  (72)  Inventors:  James Edward Critchfield,  Austin, TX  (US);  Diego Patricio Valenzela,  Amsterdam (NL);  Loren Clark Wilson,  Katy, TX (US);  Jingjun Zhou,  The  Woodlands, TX (US)  (21)  Appl. No.:  14/402,414  (22)  PCT Filed:  May 29, 2013  (86)  PCT No.:  PCT /US2013/043105  § 371 (c)(l),  (2) Date:  Nov. 20, 2014  (60)  Provisional application No. 61/653,920, filed on May  31, 2012.  (51)  Int. Cl.  BOID53/14  (2006.01)  (52)  U.S. Cl.  CPC ........  BOID 53/1493  (2013.01);  BOID 53/1468  (2013.01)  USPC ...........................................  423/228;  252/190  (57)  ABSTRACT  Publication Classification  Related U.S. Application Data  An absorbent composition that is useful in the selective  removal of hydrogen sulfide relative to carbon dioxide from  gaseous mixtures that comprise both hydrogen sulfide and  carbon dioxide and the use thereof. The absorbent composi› tion includes an aqueous solvent that comprises an amine  mixture, comprising an amination reaction product of tert› butylamine and a poly dispersed polyethylene glycol mixture,  and water with a concentration of an added strong acid to  inhibit phase separation of the aqueous solvent. The operation  of certain gas absorption processes can be improved by the  use of the absorbent composition.  28  18  20  22  12  16  62  38  56 