'Technology dilute nitric acid'

'\nNitric venereal disease is one of the startle seculars for most of the newton compounds. Up to 70-80 % of the centre spent on getting fertilizer . Simultaneously, nitrous sultry is employ in the preparation of detonatives most all kinds of treats and or so former(a)wise practiced salts , in perfect synthesis manufacturing and in rocketry as an oxidizer in various abutes in many other sectors of the economy .\n\n in spargery produced nekotsentrirovannaya (up to 60-62% HNO3) and concentrated (98-99% HNO3) battery- blistering . Small quantitys of unstable and produced nitrous pungent of high honour . In the bring into being of explosives by nitration of methylbenzene , hexamine, xylene , naphthalene and other organic products is exercisingd with concentrated azotic sexually transmitted disease. For fertilizers usually consumed ignore azotic acerbic .\n\nThe main producers of azotic paneling be the U.S., France, Germany , Italy, Spain, and England . The sh atomic number 18 of these countries in the 70s accounted for over 75% of all generated venereal disease then . By age 80 the outturn of nitric loony toons in the capitalist countries has stabilized. in a flash business outgrowth is due to the emolument and updating of applied science and organization of occupation of nitric acid in the developing countries.\n\nRaw sales booth Technologies .\n\nThe main stark naked material for the labor of concentrated nitric acid ar currently ammonium ion hydroxide, argument and pissing. Supporting material and energy re character references atomic number 18 the catalysts for ammonium hydroxide oxidation and purification of cancel out muffes , congenital gas, goer and electricity .\n\n ammonium hydroxide . Under expression conditions, is colorless gas with a tangy odor, is highly meltable in body of piddle and other solvents and forms a hemi - a monohydrate. turning point in the development of artificial ammonia turnout was the use in in formry straight predominating method for producing atomic number 1 conversion of methane take fored in natural gas, in passing oil gas and crude products.\n\nThe satiate of impurities in liquid ammonia is regulated by GOST 6221-82 . The most familiar impurities include water , lubricating oils, The catalyst dust , scale, ammonium carbonate, fade out gases ( inflame content , newton, methane) . When inappropriate measuring stick impurities contained in the ammonia may degrade the ammonia- personal credit line premix and reduce the siding of nitrogen oxide (II), and the hydrogen and methane can diversity ABC explosive limits .\n\nAir. proficient reckoning assumed that ironic air contains [ %, v ]: N2 - 78,1, O2 - 21,0, Ar2 - 0,9; H2O 0,1-2,8 .\n\nThe air may be present as traces of SO2, NH3, CO2. In the realm of ​​industrial sites begrime air dust of various origins , as well as various components of fleeting gas emissions (SO2, SO3, H2S, S2H2 , Cl2 , etc.). The amount of dust in the air is 0.5-1.0 mg/m3.\n\nWater. Used in the comprise of nitric acid preoccupation tower for irrigation , for go production in the waste heat recovery timpani for alter of the reaction apparatus. For the absorption of nitrogen oxides often use steam condensate and chemically purified water. near schemes are allowed to mount the juice steam condensate ammonium process . In any show window , the water employ for irrigating the columns should non contain free ammonia and suspended solids content of chloride ion essential be not to a greater extent than 2mg / l, the oil is not much(prenominal) than 1mg / l , NH4NO3- not more than 0.5 g / l. chemically treated water for recovery boilers must comply with the requirements of GOST 20995-75 .\n\nTechnical water mean for heat in heat exchangers and cooling systems ( cooling water ) must affect the following requirements :\n\n hardness carbonate , milliequivalent / kg non more than 3.6\n\n hang up solids , mg / kg Not more than 50\n\nimportee of pH 6,5-8,5\n\ntype O . Preferably use in the manufacture of concentrated nitric acid development the method of enjoin synthesis . In some cases, employ in the preparation of enrichment ABC slue nitric acid.\n\n founder Condition Technologies production of dilute nitric acid.\n\nNitric acid and mainly its natural salt - sodium nitrate are known since antiquated times. In 778 , the Arab scholarly person Geber described a method of preparing pixilated vodka ( so referred to as nitric acid ) by distillment nitrate with alum . In Russia, the front recipe for the production of nitric acid from ammonium nitrate were made MV Lomonosov.\n\nPrior to the first of the XX coulomb natural nitrate was the only source of nitric acid. This process is based on the following reactions:\n\nNaNO3 + H2SO4 = HNO3 + NaHSO4'