Lime-ammonium nitrate

Separation (partial) of the calcium nitrate from the digestion mixture by crystallizing out at low temperatures as its tetrahydrate. The calcium nitrate separated can be converted with ammonia/carbon dioxide to a mixture of calcium carbonate and ammonium nitrate (lime ammonium nitrate) (Odda process)... 

The calcium carbonate is then generally mixed with a 97% ammonium nitrate melt to lime ammonium nitrate melt to lime ammonium nitrate ( calnitro ) (Section 2.2.2.2). 

Pure ammonium nitrate, ammonium nitrate-ammonium sulfate mixtures and calcium carbonate-ammonium nitrate mixtures (lime ammonium nitrate, calnitro , see Section 2.2.2.2) belong to this substance class. The worldwide production of these materials in 1995 was 15.5 10 t. In total nitrogen fertilizer production there is a shift to urea, which has a higher nitrogen content and can be inexpensively produced. The total consumption of ammoni-... 

Austria. The Statistische Nachrichten (3), issued monthly, gives statistics on population, labor conditions, production, foreign trade, and wholesale prices. Production figures are given for caustic soda, chlorine, carbon dioxide, calcium carbide, lime-ammonium nitrate, acetylene (dissolved), oxygen, soda crystals, soaps and detergents, cellulose, rayon, and magnesite. 

The official statistics annual for Norwegian industry 61) gives general statistics for the different branches of the industry and detailed tables of output of products which include figures for the consumption of individual raw materials and auxiliary materials in the various industries. Figures are available for paints and lacquers (separate products), dry colors, tars, pharmaceuticals, polishes, baking powders, flavors, superphosphate, calcium nitrate, sodium bicarbonate, ammonium nitrate, ammonium bicarbonate, lime-ammonium nitrate, sodium nitrate, ammonia, sodium carbonate, nitric acid, carbide, cyanamide, explosives, ammunition and matches, and chemical pulps (separate products). 

RT-Drucksache No. 47 from 8 Mar 1915,13. Legislaturperiode, II. Session 1914/ 15. The monopoly extended to a) inorganic nitrogenous minerals, above all Chile saltpeter b) synthetic nitrogen compounds like nitric acid, nitrous acid, ammonium gas, and cyanamide and c) nitrogenous fertilizers like sodium, lime, ammonium nitrate, ammonium sulfate, and urea. 

Fig. 1. Schematic flowsheet of uranium processing (acid leach and ion exchange) operation. Numbers refer to the numbers that appear in the boxes on the flowsheet. Operations (3), (6), (9), and (11) may be done by thickening or filtration. Most often, thickeners are used, followed by filters. The pH of the leach slurry <4) is elevated to reduce its corrosive effect and to improve the ion-exchange operation on the uranium liquor subsequently separated, In tile ion exchange operation (7), resin contained in closed columns is alternately loaded with uranium and then eluted. The resin adsorbs the complex anions, such as UC fSO 4-. in which the uranium is present in the leach solution. Ammonium nitrate is nsed for elution, obtained by recycling the uranium filtrate liquor after pH adjustment. Iron adsoibed with the uranium is eluted with it. Iron separation operation (8) is needed inasmuch as the iron hydroxide slurry is heavily contaminated with calcium sulfate and coprecipitated uranium salts. Therefore, the slurry is recycled to the watering stage (3). Washed solids from 1,6). the waste barren liquor from (7), and the uranium filtrate from (11) are combined. The pH is elevated to 7.5 by adding lime slurry before the mixture is pumped to the tailings disposal area. (Rio Algom Mines Limited, Toronto)...

On the other hand about 2 grams of the substance are gently calcined with 2 grams of ammonium nitrate and 6 grams of ammonium sulphate. The residue is treated with hot dilute hydrochloric acid, the silica, silicates, barium sulphate and part of the gypsum remaining undissolved the solution is tested for alumina, zinc, lime, magnesia and alkalies by the usual methods. 

It is important to use pure ammonium nitrate. If the temperature is too high, N, NH3 and the very poisonous NO are produced. The gas must be purified by passing through solutions of ferrous sulphate, FeSO. caustic potash K01-I, and milk of lime. NO is caught by the FeS04 and is held back by the K.t >11 and lime, which also retains any C02. 

LIME SALTPETER(10124-37-5) A strong oxidizer. Violent reaction with reducing materials. Forms shock-sensitive mixtures with organic contaminants. Incompatible with combustible materials (wood, cloth, oil, grease, etc.), organics, and other easily oxidizable materials, chemically active metals, aluminum nitrate, ammonium nitrate, cyanides, esters, phosphorus, sodium hypophosphate, thyocyanates. Corrosive to many substances, including aluminum. 

Compound fertilisers (including calcium nitrate and calcium ammonium nitrate) sometimes contain 1 to 2 % of dolomitic hydrated lime. The lime confers similar benefits to pulverised dolomitic limestone (see section 10.3). 

A similar non-aqueous process has been decribed using iso-octyl phosphoric acid, monododecyl phosphoric acid or monoheptadecyl phosphoric acid as solvents, none of which require the ammonium nitrate addition. Methyl ethyl ketone, other ketones, or kerosene are suitable diluents. The sulphuric acid usage is much less than that normally required for, for example, a dilute acid leach of the camotite ore used, since the high proportion of lime present in the ore is not taken into solution. Hydrochloric acid is preferable for backwashing the uranium. 

Robison found in a bundle marked old notes, excerpts c a description which he says dates previous to 1766 in which Black says he heated nitrous ammoniac (ammonium nitrate) and obtained incoercible vapours which made lighted paper bum with prodigious violence . They did not precipitate lime water, and when they filled the air of the laboratory the effect on his breathing and sensation was very far from being unpleasant . He wonders at the quantity of water obtained in the receiver. Robison says Black must have obtained nitrous oxyd . 

Ammonium nitrate lime (21-26% N). This granular fertiliser is a mixture of ammonium nitrate and lime. It is sold under various trade names. Because of the calcium carbonate present it does not cause acidity when added to the soil. 

Up to 70% of nitrogen in soluble nitrogen fertihsers (e.g. ammonium nitrate and some other compounds) is used in the first year. For phosphate in soluble form, e g. triple superphosphate and compounds containing phosphate, allow two-thirds after one crop, one-third after two and one-sixth after three crops. For phosphate in insolnble form, e.g. bone meal and ground mineral phosphate, allow one-third after one crop, one-sixth after two and one-twelfth after three. For potash, e.g. muriate or sulphate of potash and compounds containing potash, allow a half after one crop and a quarter after two crops. For lime one eighth of the cost is subtracted each year after application. 

If precise data are required, a similar lime sample may be dissolved in a 20% solution of ammonium nitrate. Both lime and hexcrystals dissolve rapidly in ammonium nitrate solutions. This solution is treated similarly to the sample above, except the insolubles contain neither lime nor hexcrystals. These results can be used to correct the data obtained in the sugar solution test. 

Agriculture therefore depends on there being a sufficient supply of inorganic nutrients to plants. Cereals, vegetables, fruit-bearing trees or plants, and animal fodder require bioavailable nutrients, that is, nutrients in forms that they can use. Since intensive agriculture depletes many natural nutrients, synthetic nutrients (fertilizers) must be supplied.1-7 In particular, we need to fix the inert N2 of the atmosphere as soluble, reactive compounds such as nitrates, ammonia, and ammonium salts. Other major fertilizer components are sulfate, potassium, and phosphate ions. It may also be necessary to provide trace nutrients, such as cobalt compounds, or to remove excess soil acidity by treatment with lime (CaO). World fertilizer demand in the year 2001 is expected to be about 1.5 x 10s metric tons N, 7.6 x 107 metric tons P2O5, and 6.7 x 107 metric tons K2O these projections represent an... 

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