COMPOSITION AND METHOD FOR REMOVAL OF CARBONYL SULFIDE FROM ACID GAS CONTAINING SAME
申请人:Schubert Craig N.
公开号:US20100300290A1
公开(公告)日:2010-12-02
Novel solvent composition for selective removal of COS from a gas stream containing same, said composition comprising
a) at least one polyalkylene glycol alkyl ether of the formula
R
1
O-(Alk-O)
n
—R
2
(I)
or
1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone
or
a mixture of N-formylmorpholine and N-acetylmorpholine
wherein R
1
is an alkyl group having from 1 to 6 carbon atoms; R
2
is hydrogen or an alkyl group having from 1 to 4 carbon atoms; Alk is an alkylene group, branched or unbranched, having from 2 to 4 carbon atoms, and n is from 1 to 10; and
b) at least one alkanolamine compound of the formula
R
3
NHR
4
OR
6
(II)
or
at least one piperazine compound of formula
wherein R
3
is hydrogen, an alkyl group having from 1 to 6 carbon atoms, or the R
4
OH group; R
4
is a branched or unbranched alkylene group having from 1 to 6 carbon atoms; R
5
, independently in each occurrence, is hydrogen or an hydroxyalkyl group having from 1 to 4 carbon atoms; and R
6
is hydrogen, an alkyl group having from 1 to 6 carbon atoms or an hydroxyalkyl group having from 1 to 4 carbon atoms.