Gas capture process

摘要

A process for the capture of CO2 from gas streams, the process including contacting a CO2 containing gas stream with a compound including: a primary or non-sterically hindered secondary amine group and at least one tertiary amine or sterically hindered secondary amine group; wherein the primary or non-sterically hindered secondary amine and the nearest tertiary or sterically hindered secondary amine group are separated by a carbon chain including 3 or 4 carbon atoms and wherein the compound is a compound of Formula (I).

主权项

1. A process for the capture of CO2 from gas streams, the process including contacting a CO2 containing gas stream with a compound including:
a primary or non-sterically hindered secondary amine group and at least one tertiary amine or sterically hindered secondary amine group;wherein the primary or non-sterically hindered secondary amine and the nearest tertiary or sterically hindered secondary amine group are separated by a carbon chain including 3 or 4 carbon atoms and wherein the compound is a compound of Formula (I)whereinR1 is represented by hydrogen, C2 to C6 alkanol or C1 to C6 alkyl;R2 is represented by hydrogen, C1 to C6 alkyl, C2 to C6 alkanol, —(CH2)n—NR6R7, —(CH2)p—COOH, —(CH2)pCOOQ, —(CH2)p-heterocyclic ring containing one to four heteroatoms independently selected from nitrogen, oxygen and sulphur;R3 and R5 are independently selected from hydrogen, C1 to C4 alkyl, C2 to C6 alkanol, —(CH2)n—NR8R9;R4 is represented by hydrogen, C1 to C6 alkyl, C2 to C6 alkanol, —(CH2)n—NR6R7, —(CH2)p—COOH, —(CH2)pCOOQ, —(CH2)p—SO3H, —(CH2)pSO3Q, —(CH2)p—PO3H2, —(CH2)pPO3Qs, —(CH2)p-heterocyclic ring containing one to four heteroatoms independently selected from nitrogen, oxygen and sulphur;x 0 or 1;n is 2 to 6;p is 1 to 6;Q is hydrogen, a metal ion or R16R17R18R19N+;s is 1 or 2R6 and R7 are independently selected from hydrogen, alkyl, alkanol, alkylamine or R6 and R7 together with the nitrogen atom to which they are attached form a ring structureR8 and R9 are independently selected from C1 to C6 alkyl, C2 to C6 alkanol, C2 to C6 alkylamine, —(CH2)n—NR6R7, —(CH2)p—COOH, —(CH2)pCOOQ, —(CH2)p—SO3H, —(CH2)pSO3Q, —(CH2)p—PO3H2, —(CH2)pPO3Qs, or R8 and R9 together with the nitrogen atom to which they are attached form a ring structure; andR16, R17, R18 and R19 are independently selected from hydrogen or alkyl;with the proviso that when R4 is hydrogen, R1 and/or R2 is not hydrogen;when R4 is not hydrogen, R1 and/or R2 is hydrogen;when R4 and R1 are both hydrogen, R2 is not methyl; andwhen R4 and R2 are both hydrogen, R1 is not methyl.