Abstract:
본발명은유체스트림으로부터황화수소의선택적제거를위한흡수제로서, 하기 a), b) 및 c)를포함하며, 여기서 b)와 a) 사이의몰비는 0.05 내지 1.0의범위인수용액을함유하는흡수제에관한것이다: a) 3급아민; b) 상세한설명에언급된화합물로부터선택되는아민계 pH 프로모터; 및 c) 120℃에서측정되었을때 수용액의 pH 값이 7.9 내지 8.8 미만이되도록하는양의 6 미만의 pK값을갖는산. 게다가, 본발명은유체스트림으로부터산성가스를제거하는방법으로서, 여기서유체스트림은흡수제와접촉하게되는것인방법에관한것이다. 흡수제는낮은재생에너지를특징으로한다.
Abstract:
An absorbent for the selective removal of hydrogen sulfide from a fluid stream containing carbon dioxide and hydrogen sulfide contains: a) an amine compound of formula (I), where X, R1 to R7, x, y and z are defined as per the description; and b) a non-aqueous solvent; wherein the absorbent contains less than 20 wt. % water. Also disclosed is a method for the selective removal of hydrogen sulfide from a fluid stream containing carbon dioxide and hydrogen sulfide, wherein the fluid stream is brought into contact with the absorbent. The absorbent is characterised by high loadability, high cyclical capacity, good regeneration characteristics and low viscosity.
Abstract:
Disclosed is an absorbent for removing carbon dioxide from a fluid flow, said absorbent comprising an aqueous solution of: a) an amine of general formula (I), wherein R1, R2 and R3 are selected independently from one another from C1-4-alkyl and C1-4-hydroxyalkyl, R4 in each case is selected independently from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl, R5 in each case is selected independently from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl, X stands for OH or NH(CR1R2R3), m stands for 2, 3, 4 or 5, n stands for 2, 3, 4 or 5, and o stands for 0 or 1; and b) at least one activator selected from 5-, 6-, or 7-membered heterocycles with an NH group in the ring and one or to other heteroatoms in the ring, which are selected from nitrogen and oxygen. The absorbent enables a rapid absorption of carbon dioxide from fluid flows.
Abstract:
The invention relates to an absorbent for the selective removal of hydrogen sulfide from a fluid stream, containing an aqueous solution, comprising a) a tertiary amine; b) an amine pH promoter, selected from the compounds mentioned in the description; wherein the molar ratio between b) and a) is in the range of 0.05 to 1.0; and c) an acid having a pKa value of less than 6 in an amount such that the pH value of the aqueous solution is 7.9 to less than 8.8 when measured at 120 °C. Furthermore, the invention relates to a method for the removal of acid gases from a fluid stream, in which the fluid stream is brought into contact with the absorbent. The absorbent is characterized by a low regeneration energy.
Abstract:
The invention relates to a method for removing hydrogen sulphide and carbon dioxide from a stream of fluid, the method comprising: a) an absorption step, in which the stream of fluid is brought into contact with an absorption agent comprising an aqueous solution (i) of an amine of general formula (I), where R1, R2 and R3 are selected independently of one another from among C1-4 alkyl and C1-4 hydroxyalkyl; R4 in each case is independently selected from among hydrogen, C1-4 alkyl and C1-4 hydroxyalkyl; R5 in each case is selected from among hydrogen, C1-4 alkyl and C1-4 hydroxyalkyl; X represents OH or NH(CR1 R2R3); m represents 2, 3, 4 or 5; n represents 2, 3, 4 or 5; and o represents 0 or 1; and optionally (ii) at least one tertiary amine, the molar ratio of (i) to (ii) is greater than 0.05; wherein at least 90% of the hydrogen sulphide is removed from the stream of fluid, the selectivity for hydrogen sulphide in relation to carbon dioxide is no greater than 8 and a CO2- and H2S-loaded absorbent agent is thus obtained; b) a regeneration step, in which at least one sub-stream of the CO2- and H2S-loaded absorption agent is regenerated and a regenerated absorption agent is thus obtained; and c) a recirculation step, in which at least one sub-stream of the regenerated absorption agent is recirculated to the absorption step a). The method permits a high degree of separation of the hydrogen sulphide with a simultaneously high coabsorption of carbon dioxide.
Abstract:
Un proceso para la remoción selectiva de sulfuro de hidrógeno sobre dióxido de carbono de una corriente de fluido que comprende dióxido de carbono y sulfuro de hidrógeno, en que la corriente de fluido hace contacto con un absorbente, cuyo absorbente contiene una solución acuosa, que comprende una amina de fórmula (I) y opcionalmente una amina de fórmula (II) **(Ver fórmula)* en donde U-V-W es CH-O-CHR5, N-CO-CHR5 o N-CO-NR5; U'-V'-W' es C-O-CR5; R1 es independientemente alquilo de C1-C5; R2 se selecciona de hidrógeno y alquilo de C1-C5; R3 se selecciona independientemente de hidrógeno y alquilo de C1-C5; R4 se selecciona independientemente de hidrógeno y alquilo de C1-C5; R5 se selecciona de hidrógeno, alquilo de C1-C5, alquilo de C1-C5 (alcoxi de C1-C5), y alquilo de hidroxi-C1-C5; y x es un entero de 1 a 10, en donde el absorbente comprende una cantidad total de 15 % a 70 % en peso de la amina de fórmula (I) y (II), con base en el peso total del absorbente, en donde se obtienen un absorbente de carga y una corriente de fluido tratado.
Abstract:
Un proceso para eliminar gases acidos de una corriente de fluidos, en el que la corriente de fluidos se pone en contacto con un absorbente que comprende una solucion de un compuesto de formula general (I). **(Ver fórmula)** en la que R1 y R2 son independientemente alquilo C1-C4; R3 se selecciona entre hidrogeno y alquilo C1-C4, R4, R5 y R6 se seleccionan independientemente entre hidrogeno y alquilo C1-C4; x e y son numeros enteros de 2 a 4 y z es un numero entero de 1 a 3; para obtener una corriente de fluido tratada y un absorbente cargado.
Abstract:
A process for removal of acid gases from fluid stream, wherein the fluid stream is brought into contact with an absorbent to obtain a treated fluid stream and a laden absorbent, the absorbent comprising a diluent and a compound of the general formula (I) wherein R1 is selected from C1-C8-alkyl and C2-C8-hydroxyalkyl; R2 is selected from hydrogen and C1-C8-alkyl; R3 is selected from hydrogen and C1-C8-alkyl; R4 is selected from hydrogen and C1-C8-alkyl; R5 is C1-C8-alkyl; with the proviso that at least one of the following conditions (i) and (ii) is met: (i) R5 is C3-C8-alkyl bound to the nitrogen atom via a secondary or tertiary carbon atom; (ii) when R4 is hydrogen, R3 is C1-C8-alkyl; or when R4 is C1-C8-alkyl, at least one of R2 and R3 is C1-C8-alkyl; and n is an integer from 0 to 6. Further provided is an absorbent for the absorption of acid gases from a fluid stream, comprising a diluent and a compound of the general formula (I) as defined above, as well as the use of a compound of the general formula (I) as defined above for removal of acid gases from a fluid stream. The absorbents are useful for the selective removal of hydrogen sulfide from fluid streams and have high acid gas loading capacity, high stability, and low volatility.