Process and plant for producing carbon monoxide

US5609040A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Jean Billy · Le Plessis-Trévise, FR
• Francois Granier · Nogent-sur-Marne, FR

Key dates

• Filing date: Mar 28, 1995
• Grant date: Mar 11, 1997
• Expiry date: Mar 28, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S62/931
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Carbon monoxide is recovered by a cryogenic route from a gas mixture, for example from the tail gas of an operation for scrubbing with nitrogen in the preparation of an ammonia synthesis mixture, this mixture containing carbon monoxide, hydrogen and other constituents including nitrogen. The hydrogen is separated off by partial condensation and the other components by distillation of the condensate. The carbon monoxide is produced by distillation in two columns, of which only one has a head condenser fed with a flow of liquid carbon monoxide. A liquid flow is drawn at an intermediate level in the column with the head condenser and directed to the head of the other column.