Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Nitric acid Nitrobenzene, reduction

Late in the nineteenth century, Herman Sprengel patented a series of simple oxidation-reduction mixts for use in commercial blasting. These so-called Sprengel explosives typically consisted of coned nitric acid, or liquid N02, mixed with liq fuels such as nitrobenzene, carbon disulfide, petroleum, etc. They were intended to be mixed immediately before use. Because of handling difficulties Sprengel expls never became very popular (Refs 4 6)... [Pg.584]

Non-Reversible Processes. —Reactions of the non-reversible type, i.e., with systems which do not give reversible equilibrium potentials, occur most frequently with un-ionized organic compounds the cathodic reduction of nitrobenzene to aniline and the anodic oxidation of alcohol to acetic acid are instances of this type of process. A number of inorganic reactions, such as the electrolytic reduction of nitric acid and nitrates to hydroxylamine and ammonia, and the anodic oxidation of chromic ions to chromate, are also probably irreversible in character. Although the problems of electrolytic oxidation and reduction have been the subject of much experimental investigation, the exact mechanisms of the reactions involved are still in dispute. For example, the electrolytic reduction of the compound RO to R may be represented by... [Pg.505]

The forward scheme is shown here. Benzene is first treated with a mixture of sulfuric acid and nitric acid, giving nitrobenzene. Reduction, followed by basic work-up, gives aniline, which will undergo... [Pg.952]

It is manufactured by reacting benzene with a mixture of nitric and sulphuric acids. Most of the nitrobenzene produced is used to manufacture aniline, which is obtained by reduction. A considerable proportion is used as a raw material in the dyestufTs industry, either as nitrobenzene as such, or as aniline. [Pg.277]

Nitrobenzene [98-95-3]y C H N02 is produced by the nitration of benzene with a mixture of nitric and sulfuric acid. A process for the manufacture of aniline [62-53-3] C HyN, from nitrobenzene is shown in Figure 3 (16). Nitrobenzene, which contains less than 10 ppm nitrothiophene, a catalyst poison, is fed to a vaporizer where it is vaporized. As the gaseous nitrobenzene leaves the vaporizer, it is mixed with a 200% excess of hydrogen gas. The gaseous mixture then passes upward through a porous distributor plate into the reduction chamber of the fluidized-bed reactor which contains the... [Pg.260]


See other pages where Nitric acid Nitrobenzene, reduction is mentioned: [Pg.266]    [Pg.694]    [Pg.432]    [Pg.33]    [Pg.302]    [Pg.7]    [Pg.31]    [Pg.617]    [Pg.433]    [Pg.282]    [Pg.72]    [Pg.281]    [Pg.147]    [Pg.948]   
See also in sourсe #XX -- [ Pg.793 ]




SEARCH



Nitrobenzene

Nitrobenzene nitrobenzenes

Nitrobenzene reduction

© 2024 chempedia.info