Chemistry of inorganic compounds – Nitrogen or compound thereof – Oxygen containing
Reexamination Certificate
2007-08-21
2007-08-21
Langel, Wayne A. (Department: 1754)
Chemistry of inorganic compounds
Nitrogen or compound thereof
Oxygen containing
Reexamination Certificate
active
10505242
ABSTRACT:
The invention relates to a method for the production of nitric acid having a concentration of between 50 and 76%, from ammonia and gas containing oxygen, under pressure, according to a single pressure method or dual pressure method. The expansion of the residual gas takes place in at least two stages in a work efficient manner. At least one device for heating the previously expanded gas to a temperature of more than 450° is disposed between every other expansion stage, using waste heat from the production process of nitric acid.
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Inorganic Oxygen Compounds, “Winnacker/Küchler” Chemische Technolgie, vol. 2, Inorganic Technology 1, 4thEd., published by Mundo/Weber, Carl Hanser Publishing House in Munich & Vienna, no date.
Claes Detlev
Dziobek Frank
Johanning Joachim
Maurer Rainer
Szonn Erich
Langel Wayne A.
Marshall & Melhorn LLC
UHDE GmbH
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