Oxidative nitric acid

The bluish white, hard, yet ductile, metal is inert to all acids and highly non-abrasive. Used for heavy-duty parts in electrical contacts and spinning jets. Reflectors are prepared from the mirror-smooth surfaces (e.g. head mirrors in medicine). Thin coatings provide a corrosion-resistant protective layer, for example, for jewelry, watches, and spectacle frames. The metal is a constituent of three-way catalysts. Rhodium complexes are used with great success in carbonylations (reactions with CO) and oxidations (nitric acid) in industry. Platinum-rhodium alloys are suitable thermocouples. 

Mercuiy(II) oxide, Nitric acid MRH Mercury(II) oxide 1.59/tr. 

See Metal oxides Nitric acid, both above Iodine Metals... 

Aluminum powder, Carbon tetrachloride Aluminum powder, Tetrachlorethylene CNTA, Hydrogen sulfide. Benzene, Lead 11 hydroxide Mercury-ll-nitrate, Sodium azide Mercury, Nitric acid. Alcohol Mercury, Nitric acid. Ethanol Ammonia, Mercury oxide. Nitric acid Nitric acid. Methylene diformamide. Acetic anhydride. Formic acid. Benzene... 

On the other hand, nitrogen dioxide has proved to be a valuable component of propergolic mixtures in which nitric acid is an essential oxidant. Nitric acid containing approximately 20% N204 is a particularly valuable oxidant as explained below. 

In summarizing the present stability data on AN, prepd from synthetic ammonia and ammonia oxidation nitric acid, it may be said that up to temp of its mp, AN is fairly stable. At slightly above it s mp (say ca 170°), slow decompn begins, but this is hardly perceptible until temps 200—210° are reached. From this point on the decompn, accompanied by evoln of gas, is fairly rapid and, if the substance is confined, explosion may take place above 260° (See Refs 91 92 and 124 for more info rmation on the thermal decompn of AN)... 

In conclusion of the present section, attention may he directed to two other strong mineral acids that have been condensed with ethylene oxides nitric acid and perchloric acid. These reagents, provided they are ueed as cold dilute aqueous solutions to avoid oxidative reactions, give 1,2-diol monoesters. 

There are several sample digestion procedures used in elemental analysis. All of them use strong oxidizers (nitric acid, hydrochloric acid, and hydrogen peroxide) to solubilize environmentally available metals. The following distinctions between different types of elemental analysis digestion procedures are important for the planning of data collection and in data interpretation. 

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

Forms unstable explosive products in reaction with acetaldehyde + desiccants (forms polyethyUdine peroxide) acetic acid (forms peracetic acid) acetic + 3-thietanol acetic anhydride acetone (forms explosive peroxides) alcohols (products are shock-and heat-sensitive) carboxylic acids (e.g., formic acid, acetic acid, tartaric acid), diethyl ether, ethyl acetate, formic acid -f- metaboric acid, ketene (forms diacetyl peroxide) mercur f(II) oxide + nitric acid (forms mercur f(II) peroxide) thiourea -f- nitric acid polyacetoxyacryUc acid lactone + poly(2-hydroxyacrylic acid) + sodium hydroxide. 

When ammonia is oxidized nitric acid is the result if the reaction is carried to its limit, but less complete oxidation produces nitrous acid. 

Other oxidising agents, especially nitric acid and the oxides of nitrogen, convert some elements to oxides. Nitric acid, for example, oxidises sulphur to SO2 and SO3, and germanium and tin to GeOg and SnOg, respectively. 

The following were groups of compounds used as fuels hydrocarbons, amines, hydrazines, boranes and as oxidizers nitric acid, nitrogen oxides, hydrogen peroxide, liquid oxygen, halogens. 

An alternative mechanism was suggested by Oxley and coworkers. [59] They concluded that above 160°C the decomposition occurs by a free-radical mechanisms while an ionic mechanism is important below this temperature. The decomposition of ADN leads to nitrous oxide, nitric acid or nitrate and nitrogen gas. It was assumed that the first step in ADN decomposition is hydrogen transfer to form ammonia and dinitramic acid. Several proposed decomposition pathways for ADN decomposition that involve conversion of the dinitramide ion to N2O have been proposed but they await confirmation.[59]... 

Furan polymer concrete is a corrosion-resistant polymer material. Endurance tests (a year or more) showed high resistance of this material to most industrial chemicals, except oxidants (nitric acid, acetic acid) and some solvents (acetone, benzene, alcohol). 

Nitration and oxidation. Nitric acid does not react appreciably with TBP at temperatures up to 70°C. At sufficiently high temperatures, however, nitration and oxidation take place. In two instances reaction of TBP-hydrocarbon mixtures with hot, concentrated solutions of nitric acid and uranyl nitrate led to destructive explosions. At Savannah River in 1953 [Cll], an evaporator was destroyed while concentrating a solution of nitric acid and uranyl nitrate that contained TBP and a kerosene diluent. At Oak Ridge in 1959 [A8], an explosion occurred in a radiochemical plant evaporator that was concentrating a nitric acid solution of plutonium nitrate possibly contaminated by TBP, diluent, and their radiation degradation products. 

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