C - Chemistry – Metallurgy – 01 – C
Patent
C - Chemistry, Metallurgy
01
C
C01C 1/02 (2006.01) C01B 17/74 (2006.01) C01B 17/90 (2006.01) C01C 1/242 (2006.01)
Patent
CA 2461683
A method is described for manufacturing ammonia and sulphuric acid by decomposition of ammonium sulphate by a chemical and thermal handling process. The method concerns mixing of ammonium sulphate with concentrated sulphuric acid, where the mixture is heated to a temperature above 235 ~C, whereby ammonium sulphate is melted, and thereafter by heating the mixture to above 280 ~C but below the boiling point of concentrated sulphuric acid. It is hereby achieved to decompose ammonium sulphate into ammonia gas and sulphuric acid liquid simultaneously, where the produced sulphuric acid during the reaction time is mixed ideally with the concentrated sulphuric acid from the initial basis mixture.
La présente invention concerne un procédé d'obtention d'ammoniac et d'acide sulfurique par décomposition du sulfate d'ammonium par voie chimique et thermique. A cet effet, on mélange le sulfate d'ammonium à de l'acide sulfurique concentré, et on chauffe le mélange à une température supérieure à 235 ·C amenant la fusion du sulfate d'ammonium, puis on chauffe le mélange à une température supérieure à 280 ·C tout en restant en dessous du point d'ébullition de l'acide sulfurique concentré. On obtient ainsi une décomposition du sulfate d'ammonium en ammoniac gazeux et en acide sulfurique, l'acide sulfurique produit pendant la phase de réaction venant se mélanger de façon parfaite avec l'acide sulfurique concentré issu du mélange de base initial.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Silica Tech Ans
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