Nitric acid, mixtures with

Though neither of the components is individually hypergolic with red fuming nitric acid, mixtures with magnesium containing 20% and 30% of 2-nitroaniline ignite with 67 and 23 ms delay, respectively. 

HVDROCHLORIC-ACIO MIXTURES—sae also NITRIC ACID MIXTURES WITH HYDROCHLORIC ACID ... 

Nitric acid mixtures with hydrochloric acid INDUSTRY (PROCESS) u. O iw o d lu S 1 2 Q 1 1 1 TYPE 304 TYPE 316 TYPE 317 20 ALLO 825... 

Nitric acid mixtures with hydrochloric acid 533, 534, 644, 833... 

Nitric acid has been used in various forms as the oxidizer in liquid-fueled rockets. These forms include red fuming nitric acid, white fuming nitric acid, mixtures with sulfuric acid, and these forms with HF inhibitor. IRFNA (inhibited red fuming nitric acid) was one of 3 liquid fuel components for the BOMARC missile. 

If this reaction takes place in air, the evolved nitrogen monoxide is oxidised to the dioxide and this dissolves again as in equation (9.1) hence virtually complete conversion of nitrogen dioxide to nitric acid can occur (see nitric acid, below). With alkalis, a mixture of nitrite and nitrate is formed ... 

Most synthetic camphor (43) is produced from camphene (13) made from a-piuene. The conversion to isobomyl acetate followed by saponification produces isobomeol (42) ia good yield. Although chemical oxidations of isobomeol with sulfuric/nitric acid mixtures, chromic acid, and others have been developed, catalytic dehydrogenation methods are more suitable on an iadustrial scale. A copper chromite catalyst is usually used to dehydrogenate isobomeol to camphor (171). Dehydrogenation has also been performed over catalysts such as ziac, iadium, gallium, and thallium (172). 

The elements of Group 5 are in many ways similar to their predecessors in Group 4. They react with most non-metals, giving products which are frequently interstitial and nonstoichiometric, but they require high temperatures to do so. Their general resistance to corrosion is largely due to the formation of surface films of oxides which are particularly effective in the case of tantalum. Unless heated, tantalum is appreciably attacked only by oleum, hydrofluoric acid or, more particularly, a hydrofluoric/nitric acid mixture. Fused alkalis will also attack it. In addition to these reagents, vanadium and niobium are attacked by other hot concentrated mineral acids but are resistant to fused alkali. 

Spray solution 1 Cautiously and with cooling mix 30 ml nitric acid (65 %) with 10 ml sulfuric acid and add the mixture with cooling and mixing to 40 ml methanol. The reagent solution may be kept for several weeks. 

Addition of ether to a nitration mixture (2-bromotoluene and cone, nitric acid) diluted with an equal volume of water in a separating funnel led to a low order explosion. This was attributed to oxidation of the ether (possibly containing alcohol) by the... 

Acetic anhydride-nitric acid mixtures are extensively used for chloride-catalyzed nitrations. Other nitrating agents have been used and involve similar sources of electropositive chlorine for intermediate chloramine formation. 4,10-Dinitro-4,10-diaza-2,6,8,12-tetraoxaisowurtzitane (TEX) (40), an insensitive high performance explosive (VOD 8665 m/s, d = 1.99 g/cm ), is synthesized by treating the dihydrochloride salt of the corresponding amine (39) with strong mixed acid. ... 

Wright and co-workers prepared a number of alkyldichloramines from the action of hypochlorous acid on primary amines and found these stable enough in acidic solution to undergo nitration with acetic anhydride-nitric acid mixtures to give the corresponding N-chloronitramines (Equation 5.13). A-Chloronitramines are isolatable intermediates and stable under acidic conditions, although some are sensitive and violent explosives. The presence of... 

The chemistry of l,5-dinitroendomethylene-l,3,5,7-tetraazacyclooctane (239) (DPT) is interesting in the context of the nitramine products which can be obtained from its nitrolysis under different reaction conditions. The nitrolysis of DPT (239) with acetic anhydride-nitric acid mixtures in the presence of ammonium nitrate is an important route to HMX (4) and this has been discussed in Section 5.15.2. The nitrolysis of DPT (239) in the absence of ammonium nitrate leads to the formation of l,9-diacetoxy-2,4,6,8-tetranitro-2,4,6,8-tetraazanonane (248) the latter has found use in the synthesis of energetic polymers. 

Tungsten also forms hard, crystalline refractory borides, such as WB2, W2B and WB when heated with boron in an electric furnace. Tungsten also forms a group of silicides, hard refractory compounds of compositions WSi2, WSis and W2Si3. These silicides are attacked by hydrofluoric-nitric acid mixture or by fused alkalies. 

French Compound. A substance of unknown composition obtained when dilute nitric acid reacts with a mixture of TNT and lead (or iron). French Compound easily ignites when brought into contact with nitric acid vapor at 100°, Either fragmentation or HE bombs can be loaded with this material and the method of loading is either lump or by compression of powdery. material. This material was used by Russions... 

TNT. A similar relation is reported for brisance by Trauzl test. In dry mixts the expln efficiency decreases with increasing TNT content (as a result of incomplete reaction), and increases in the case of w-filled expls. The author concludes that for dry mixts the stoichiometry ratio of components prevails, while in w-filled samples the brisance effect is greater for mixts rich in TNT] 2) Y. Bernard et al, Detonation Characteristics of Liquid Nitropropane n—Nitric Acid Mixtures , CR, AcadSciParis, Ser A, B293B (20), 1096-99 (1966) (Fr) CA 68,39485 (1967) [The authors report on the deton parameters of the subject mixt. They found that the deton vel ( 6.5km/sec) decreases linearly with increasing initial temp (0 to 29°) and w content. The calcd deton pressure for the reaction (including w) is of the order of 140kilobars]... 

It is fairly generally believed that nitrosulphonic acid plays an important part in the lead chamber process for the manufacture of sulphuric acid (see p. 153). The vapour pressures of mixtures of sulphuric acid with nitrous or nitric acid or with both these acids, within the range occurring in the chambers, increase with the nitrogen acid content and with rise in temperature, and the total pressure is always higher than the sum of the individual pressures, especially when the sulphuric acid is concentrated, for nitric acid - sulphuric acid mixtures this may be explained 1 by the occurrence of the following... 

If the nicotine and nitric acid mixture is merely placed on a steam bath and allowed to heat without control of the temperature, an occasional run will react violently, with loss of material. 

To 20 gms. (1 mol.) of cold boiled-out 67% nitric acid, 2 gms. of urea in 15 gms. (excess) of absolute alcohol are added, and half of the mixture distilled off on a water bath in a tubulated retort attached to condenser and receiver. 40 gms. of similar nitric acid mixed with 30 gms. of absolute alcohol, and containing 0-5 gm. of urea, are now allowed to drop in through the tubulus from a tap funnel at the same rate as the liquid distils. Water is added to the distillate, the ester which separates is washed several times with cold water, dried over calcium chloride, and distilled from a water bath, the fraction 84°—88° being retained. Care must be taken in this experiment, as the ester is liable to explode when quickly heated. All operations should be carried out behind a metal screen. 

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