Nitric Acid ammonia oxidation

Schematic (block) diagram production of nitric acid by oxidation of ammonia...

A plant is producing nitric acid by oxidizing ammonia with air. The gases leaving the oxidation unit are cooled to condense out essentially... 

Nitrites Nitrobenzene Nitroethane Nitrogen trichloride Organic nitrites in contact with ammonium salts, cyanides Nitric acid, nitrous oxide, silver perchlorate Hydroxides, hydrocarbons, metal oxides Ammonia, As, hydrogen sulfide, nitrogen dioxide, organic matter, ozone, phosphine, phosphorus, KCN, KOH, Se, dibutyl ether... 

N -Tetranitrate Ethylenediamine, Ethylene oxide, Phosphorus pentoxide, Nitric acid, Ammonia, Diethyl ether... 

Preparation of Nitric Acid by Oxidizing Ammonia. Assemble an apparatus as shown in Fig. 90. Pour a 2% ammonia solution into flask 1. Put a loose layer of freshly roasted platinized asbestos into the middle of tube 2 over a length of 4-5 cm. Pour a neutral litmus solution or several drops of methyl red into flask 3 and connect the short tube of this flask to water-jet pump 4. Heat the platinized asbestos slightly with the flame of a gas burner and pass through it... 

In the first step of the Ostwald process for the synthesis of nitric acid, ammonia is converted to nitric oxide by the high-temperature reaction... 

This salt can be prepared by the action of hydrochloric acid upon metallic tin, but since the action is exceedingly slow, it is hastened by the addition of a very small quantity of nitric acid, which oxidizes the tin. Nitric acid is ordinarily reduced only to the oxide NO by its action upon a metal but in the course of this preparation no red fumes of oxides of nitrogen are found to escape, because, under the influence of tin and stannous chloride, the reduction does not stop at nitric oxide, but continues to the lowest possible step, which is ammonia or in this case its salt, ammonium chloride. Stannous salts are oxidized quite readily to stannic by the oxygen of the air to prevent this happening during the evaporation of the solution, an excess of metallic tin is kept in the liquid. 

The formation of amidoazo-compounds by molecular rearrangement of diazoamido-compounds. The nitrous acid and nitric acid were oxidation products of the ammonia which was added. 

Bamag-Meguin A process for making nitric acid by oxidizing ammonia. It differs from similar processes in isolating liquid dinitrogen tetroxide as an intermediate. Operated in Silesia in the early 20th century. 

Grande Paroisse A process for making nitric acid by oxidizing ammonia claimed to be self-sufficient in power. 

Krupp Uhde Nitric acid Ammonia Process oxidizes ammonia into nitric oxide then oxidizes nitric oxide to nitric acid has environmental control requirements 22 NA... 

PROP Brownish-black, heavy, odorless powder. Light sensitive. D 7.22 25°/4°. Decomp at approx 200°. Yery sol in dilute nitric acid, ammonia less sol in NaOH solns insol in ale. IDLH 10 mg/m (as Ag). SYNS ARGENTOUS OXIDE DISILVER OXIDE... 

In the manufacture of nitric acid, ammonia and preheated air are mixed to form a gas containing 10.0 mole% NH3 at 600 C. The ammonia is then catalytically oxidized to form NO2, which is absorbed in water to form HNO3. If ammonia enters the gas blending unit at 25 C at a rate of 520 kg/h and heat is lost from the mixer to its surroundings at a rate of 7.00 kW, determine the temperature to which the air must be preheated. (See Example 8.3-6.)... 

Incompatibilities with Other Materials Aluminum, bases, alkali metals, ketones, organic peroxides, nitric acid, strong oxidizing agents, strong reducing agents, liquid ammonia, amines. 

Under the influence of a catalyst, ammonia, NHj, can be oxidised by air to form water and nitric acid or oxides of nitrogen thus —... 

For the production of nitric acid, ammonia passes over a platinum catalyst and is oxidized to nitric oxide. The NO is further oxidized into NO2 which is absorbed in water to form HNO3. The removal of NO in the exhaust from nitric acid plants differs from that of power plants because of the different NO NO2 ratio. For nitric acid plants and power plants this ratio is 1 and 19, respectively. 

Figure 3.11 Nitric acid via oxidation of ammonia. Source [3],...

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