Patent ID: 8480795
Filing Date: 2013-07-09
Classification: B01D,B01J,C01B,C07C,C07F,C10G,Y02P

Abstract:
1. An absorbent for the selective absorption of H 2 S from gaseous mixtures containing H 2 S and CO 2 , said absorbent having the formula: wherein R 1 is a tertiary C 4 -C 9 alkyl group, R 2 , R 3 and R 4 are the same or different and selected from hydrogen, C 1 -C 9 substituted or unsubstituted alkyl C 3 -C 9 substituted or unsubstituted branched chain alkyl, C 3 -C 9 cycloalkyl, C 6 -C 9 aryl, alkylaryl or arylalkyl, C 2 -C 9 straight or branched hydroxyalkyl, hydroxy cycloalkyl wherein (i) when n is 2 or more, R 3 and R 4 on adjacent carbon or on carbons separated by one or more carbons can be a cycloalkyl or aryl ring, (ii) when substituted, the substituents are heteroatom containing substituents, (iii)n is an integer of 1 or more, and (iv) metal cation is a monovalent, divalent or trivalent metal cation sufficient to satisfy the valence requirements of the anion or anion cluster.