US 11,795,404 B2
Composition for removing sulfur-containing compounds
Naoya Minamoto, Kamisu (JP); Yuusuke Saitou, Kamisu (JP); and Takuo Tsuruta, Chiyoda-ku (JP)
Assigned to KURARAY CO., LTD., Kurashiki (JP)
Appl. No. 16/975,322
Filed by KURARAY CO., LTD., Kurashiki (JP)
PCT Filed Feb. 20, 2019, PCT No. PCT/JP2019/006305
§ 371(c)(1), (2) Date Aug. 24, 2020,
PCT Pub. No. WO2019/167752, PCT Pub. Date Sep. 6, 2019.
Claims priority of application No. 2018-035746 (JP), filed on Feb. 28, 2018.
Prior Publication US 2021/0032548 A1, Feb. 4, 2021
Int. Cl. C10G 29/24 (2006.01); B01D 53/52 (2006.01); C10L 3/10 (2006.01)
CPC C10G 29/24 (2013.01) [B01D 53/52 (2013.01); C10L 3/103 (2013.01); B01D 2257/304 (2013.01); B01D 2257/306 (2013.01); B01D 2258/012 (2013.01); B01D 2258/018 (2013.01); B01D 2258/05 (2013.01); C10G 2300/202 (2013.01); C10G 2300/207 (2013.01); C10L 2290/44 (2013.01); C10L 2290/545 (2013.01)] 9 Claims
 
1. A composition, comprising:
an aldehyde; and
at least one of an amine of formula (1) and an amine of formula (2):

OG Complex Work Unit Chemistry
wherein
R1 to R11 are each independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, provided that R1, R2, R7, and R8 may be connected to R3, R6, R9, and R11, respectively, to form an alkylene group having 2 to 6 carbon atoms;
a pKa value of the conjugate acid of the amine of formula (1) and the amine of formula (2) is 11.3 or higher in water at 25° C., and
the composition is suitable for removing a sulfur-containing compound selected from the group consisting of hydrogen sulfide and an —SH group-containing compound from at least one of a liquid and gas.