PROCESS AND PLANT FOR THE COMBINED PRODUCTION OF AN AMMONIA SYNTHESIS MIXTURE AND CARBON MONOXIDE

摘要

In the process of the invention, an ammonia synthesis mixture and carbon monoxide are produced. The hydrogen is purified in a nitrogen-washing column (61). The carbon monoxide is recovered cryogenically from a first liquid fraction (51) collected at the base of the said washing column (61), in a medium-pressure stripping column (62), then in a low-pressure distillation column (63). A second liquid fraction (52) is drawn from a position intermediate between the base and head of the washing column (61).