Process for the preparation of ammonia synthesis gas

Details Process for the preparation of ammonia synthesis gas Process for the preparation of ammonia synthesis gas

C - Chemistry, Metallurgy

01

B

C01B 3/38 (2006.01) B01B 1/00 (2006.01) C01B 3/02 (2006.01) C01B 3/22 (2006.01) C01B 3/32 (2006.01)

Patent

CA 2057600

A process is provided herein for the preparation of ammonia synthesis gas by steam reforming and/or partial oxidation of a hydrocarbon feedstock. Such process includes the further steps of catalytically converting a part of the synthesis gas to methanol. Such prepared methanol is liquified and separated from remaining nitrogen-rich gas. The nitrogen-depleted methanol is then reconverted to hydrogen and carbon oxides gases. Such gases are recombined with the remainder of the nitrogen-containing synthesis gas to obtain stoichiometric ammonia synthesis gas.

Méthode pour préparer un gaz de synthèse de l'ammoniac par reformage à la vapeur et (ou) oxydation partielle d'une alimentation d'hydrocarbures. Cette méthode comprend les étapes ultérieures de conversion d'une partie du gaz de synthèse en méthanol. Le méthanol ainsi préparé est liquéfié et séparé du gaz restant riche en azote. Le méthanol appauvri en azote est ensuite reconverti en hydrogène et en oxydes de carbone gazeux. Ces gaz sont recombinés avec le reste du gaz de synthèse renfermant de l'azote pour obtenir un gaz de synthèse d'ammoniac dans des proportions stoechiométriques.

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