Abstract:
Disclosed is an absorbent for eliminating carbon dioxide from a gas flow. Said absorbent comprises an aqueous solution of at least one amine and at least one amino carboxylic acid and/or amino sulfonic acid. Additionally using an amino carboxylic acid or amino sulfonic acid reduces the amount of energy required for regenerating the absorbent.
Abstract:
The present invention relates to an apparatus for the tangential introduction of a gas-loaded liquid stream into the top of a column in which gas and liquid are separated. Entry into the column top proceeds through a conventional radially arranged port, to which, however, a special tube construction connects which ensures as smooth as possible non-turbulent flow and its tangential exit into the column top.
Abstract:
In a process for deacidifying a fluid hydrocarbon stream which comprises carbon dioxide (CO 2 ) and/or other acid gases as impurities, the fluid stream is brought into intimate contact with an absorption liquid in an absorption or extraction zone ( 12 ), the substantially purified fluid stream and the absorption liquid which is loaded with CO 2 and/or other acid gases are separated from one another, and the absorption liquid is subsequently regenerated and then again fed to the absorption extraction zone ( 12 ). To regenerate the absorption liquid, the loaded absorption liquid is first expanded in a first low-pressure expansion stage ( 22 ) to a pressure of from 1 to 2 bar (absolute). The partially regenerated absorption liquid is then heated in a heat exchanger ( 20 ) and then, in a second low-pressure expansion stage ( 29 ), again expanded to a pressure of from 1 to 2 bar (absolute).
Abstract:
In a process to reduce the acid content in a fluid flow, the gas is brought into contact with an aqueous absorbent containing methyl-diethanolamine and piperazine. The total amine content is in the range 20-70% by weight of the absorption agent. The ratio by weight of methyl-diethanolamine to piperazine is in the range 9-15. The process uses an absorbent in which the total amine content is in the range of 45-55% by weight. The ratio of methyl-diethanolamine to piperazine is in the range of 13-15. The absorption process is conducted in two sequential stages. The process further incorporates a regeneration phase consisting of one or more expansion phases in which acid is expelled from the absorbent and the absorbent re-used. An Independent claim is included for an aqueous absorption agent containing methyl-diethanolamine and piperazine.
Abstract:
COS is selectively removed with respect to CO2 from a hydrocarbonaceous fluid stream which contains CO2 and COS. Examples of the fluid stream include a gas stream, for example natural gas, synthesis gas from heavy oil or heavy residues or refinery gas, or from liquid or liquefied hydrocarbons, for example LPG (Liquefied Petroleum Gas) or NGL (Natural Gas Liquids). The process is carried out by (1) intimately contacting the fluid stream in an absorption or extraction zone with a scrubbing liquor consisting of an aqueous amine solution containing from 1.5 to 5 mol/l of an aliphatic alkanolamine having of from 2 to 12 carbon atoms and from 0.8 to 1.7 mol/l of at least one activator selected from the group consisting of piperazine, methyl piperazine and morpholine, (2) removing the COS essentially completely from the fluid stream, and (3) separating the substantially COS-decontaminated fluid stream and the COS-loaded scrubbing liquor and discharging them from the absorption or extraction zone.
Abstract:
The disclosure concerns a process for removing mercaptans from fluid streams comprising same, especially from hydrocarbon gas streams, for example natural gas, synthesis gas from heavy oil or heavy residues or refinery gas, or else from liquid hydrocarbons, for example LPG (liquefied petroleum gas). The invention comprises intimately contacting the fluid stream in an absorption or extraction zone with a scrubbing liquor comprising at least one aliphatic alkanolamine of 2-12 carbon atoms, the amount of wash liquor being supplied to the absorption or extraction zone being sufficient to remove at least CO2 and H2S essentially completely from the fluid stream, and separating the substantially decontaminated fluid stream and the contaminated wash liquor and discharging them from the absorption zone. The substantially complete removal of CO2 and H2S is accompanied by the removal from the gas, stream of a very large portion of the mercaptans as well, without a significant fraction of the hydrocarbon gases dissolving in the wash liquor.
Abstract:
A process for removing impurities from 3-(2'-acetoxyethyl)-dihydro-2(3H)-furanone (I), which comprises initially preparing the 3-(2'-acetoxyethyl)-dihydro-2(3H)-furanone containing the undesirable impurities in a manner known per se by acetylating 3-(2'-hydroxylethyl)-dihydro-2(3H)-furanone, subsequently treating it with strong mineral acids and finally removing the decomposition products of the undesirable impurities from I.
Abstract:
The present invention relates to an apparatus for the tangential introduction of a gas-loaded liquid stream into the top of a column in which gas and liquid are separated. Entry into the column top proceeds through a conventional radially arranged port, to which, however, a special tube construction connects which ensures as smooth as possible non-turbulent flow and its tangential exit into the column top.
Abstract:
COS is selectively removed with respect to CO2 from a hydrocarbonaceous fluid stream which contains CO2 and COS. Examples of the fluid stream include a gas stream, for example natural gas, synthesis gas from heavy oil or heavy residues or refinery gas, or from liquid or liquefied hydrocarbons, for example LPG (Liquefied Petroleum Gas) or NGL (Natural Gas Liquids). The process is carried out by (1) intimately contacting the fluid stream in an absorption or extraction zone with a scrubbing liquor consisting of an aqueous amine solution containing from 1.5 to 5 mol/l of an aliphatic alkanolamine having of from 2 to 12 carbon atoms and from 0.8 to 1.7 mol/l of at least one activator selected from the group consisting of piperazine, methyl piperazine and morpholine, (2) removing the COS essentially completely from the fluid stream, and (3) separating the substantially COS-decontaminated fluid stream and the COS-loaded scrubbing liquor and discharging them from the absorption or extraction zone.
Abstract:
EN DONDE LA CORRIENTE DE FLUIDOS CONTIENE CO2, IMPUREZAS COMO H2S Y MERCAPTANOS, Y COS PROVENIENTE DE CORRIENTES DE GAS NATURAL, GAS DE SINTESIS DE CRUDO PESADO O RESIDUOS PESADOS O GAS DE REFINERIA, O DE HIDROCARBUROS LIQUIDOS O LICUADOS COMO GAS LICUADO DE PETROLEO O LIQUIDO DE GAS NATURAL; Y EL LICOR DE LAVADO COMPRENDE UNA SOLUCION ACUOSA DE AMINA QUE CONTIENE DE 1,5 A 5 MOLES/L DE UNA ALCANOLAMINA TERCIARIA ALIFATICA C2-C12, Y DE 0,8 A 1,7 MOLES/L DE UN ACTIVADOR QUE COMPRENDE UN N-HETEROCICLO SATURADO DE 5 o 6 MIEMBROS EL CUAL CONTIENE OPCIONALMENTE HETEROATOMOS ADICIONALES COMO OXIGENO Y NITROGENO . LA REMOCION COMPRENDE: a) PONER EN CONTACTO LA CORRIENTE DE FLUIDOS Y EL LICOR DE LAVADO, EN UNA ZONA DE ABSORCION O EXTRACCION; b) REMOVER EN FORMA COMPLETA EL COS DE DICHA CORRIENTE; Y, c) SEPARAR LA CORRIENTE DESCONTAMINADA Y EL LICOR CARGADO DE COS, Y DESCARGARLOS DE LA ZONA DE ABSORCION O EXTRACCION, RECICLANDO DICHO LICOR. EL CONTENIDO DE AMINA DEL LICOR DE LAVADO ES DE 20% A 70% EN PESO, DONDE LA ALCANOLAMINA USADA ES METILDIETANOLAMINA O TRIETANOLAMINA. EL ACTIVADOR SELECCIONADO PUEDE SER MONOETANOLAMINA, MONOMETIL-ETANOLAMINA, DIETANOLAMINA, PIPERAZINA, METILPIPERAZINA O MORFOLINA