Nitrogen dioxide oxidation with

Nitrogen dioxide reaets with water, giving first a mixture of nitrous and nitrie aeids, and ultimately nitrie aeid and nitrie oxide ... 

In the manufacture of nitric acid, HN03, nitrogen dioxide reacts with water to form HNO3 and nitric oxide, NO ... 

Much evidence has been accumulated that the ozone-olefin reaction has a predominant role in aerosol formation from alkenes, cyclic olefins, diolefins, and other unsaturated compounds. Free radicals are formed in the reaction and can react further, along with nitric oxide and nitrogen dioxide, either with the various intermediates or with the olefin itself (see the recent review by Pitts and Finlayson ). 

When sulfur dioxide is present in the polluted air, it causes a n a-tive interference equal to 1(X)% of an equimolar concentration of oxidant. The response to the pollutant, nitrogen dioxide, varies with the reagent formulation and scrubber design. For 10% potassium iodide, nitrogen dioxide produces a positive interference of approximately 21% for 20% potassium iodide, the interference produced is approximately 30%. ... 

The concentration of nitrogen oxides found in the air is almost always much less than these levels, and the health effects described here rarely occur except in accidents or spills in which nitrogen dioxide is released to the air. Instead, the most serious health consequences related to NO exposure occur indirectly, when nitrogen dioxide reacts with other air pollutants to form photochemical smog... 

For example, tyrosine residues on proteins are readily nitrated by a free radical mechanism (Prutz et al., 1985), where one nitrogen dioxide oxidizes the tyrosine to a phenyl radical that reacts with a second nitrogen dioxide to give nitroty-... 

The oxidation of perfluoro-2-nitrososulfonyl fluoride 5 to the corresponding nitro compound 6 is carried out only by nitrogen dioxide, and with low yields.284 The 2-nitrite isomer 7 is obtained in parallel as the major product in 40% yield.284... 

Nitric acid Nitrogen dioxide mixed with nitrogen oxide, oxygen, nitrogen Nitrous oxides Nitric acid, water Nitric acid manufacture Stripping not practiced... 

Form Supplied in red solid prepared from optically pure d-camphor oxime in a five-step sequence (eq 1) reduction with sodium in n-amyl alcohol followed by fractional recrystallization of the resulting hydrochloride salts of bornylamines gives the endo-isomer in enantiomerically pure form treatment with phosgene and direct condensation of the isocyanate with (ethoxycarbonyl)hydrazine gives a compound which cyclizes upon treatment with base subsequent nitrogen dioxide oxidation furnishes (-)-en[Pg.145]

HNO3 is commercially prepared by the Ostwald process. At high temperatures, NH3 is catalytically converted to NO, which is cooled and then air-oxidized to NO2. Nitrogen dioxide reacts with H2O to produce HNO3 and some NO. The NO produced in the third step is then recycled into the second step. More than 18 billion pounds of HNO3 was produced in the United States in 1997. 

Although several methods for the preparation of nitric acid are theoretically available, only one finds much commercial use the direct oxidation of ammonia, an updated and improved version of the traditional Ostwald process. In this method, ammonia is heated and reacted with air over a catalyst, most commonly a mixture of rhodium and platinum metals. That reaction results in the formation of nitric oxide (NO), which is then converted to nitrogen dioxide (N02). The nitrogen dioxide reacts with water to form nitric acid. 

The nitrate radical (NO3) is formed in the atmosphere primarily by the reaction of nitrogen dioxide (NO2) with ozone (O3). At the outset of this project the potential importance of the role of NO3 as an oxidant in the troposphere had just been recognised. In order to assess the latter accurate physico-chemical models, describing the behaviour of NO3 in the troposphere, are needed. These require a detailed understanding of the elementary photochemical or chemical reactions and physical processes such as deposition or transport, which determine the tropospheric lifetime of NO3. 

---