Method for the absorptive outward transfer of ammonia and methane out of synthesis gas

摘要

The invention relates to a process for the absorptive separation of NH₃ and CH₄ from a gas under high pressure, which at least contains NH₃, H₂, N₂ and CH₄, using a high-boiling, physically acting and regenerable solvent which contains homologues of alkylene glycol-alkyl-ether and which also may contain water, the absorbed components NH₃, H₂, N₂ and CH₄ being separated from the laden solvent in at least two further process steps at different pressure rates, thereby withdrawing at least one NH₃-rich and at least one CH₄-rich gas fraction from the solvent. This process is particularly suitable to be incorporated as unit in an ammonia production plant.