Calcium ammonium nitrate

Some commonly used primary nutrient fertilizers are incidentally also rich sources of calcium. Ordinary superphosphate contains monocalcium phosphate and gypsum in amounts equivalent to all of the calcium originally present in the phosphate rock. Triple superphosphate contains soluble monocalcium phosphate equivalent to essentially all the P2 5 product. Other fertilizers rich in calcium are calcium nitrate [10124-37-5] calcium ammonium nitrate [39368-85-9] and calcium cyanamide [156-62-7]. The popular ammonium phosphate-based fertilizers are essentially devoid of calcium, but, in view of the natural calcium content of soils, this does not appear to be a problem. 

Many plants outside of North America pfill or granulate a mixture of ammonium nitrate and calcium carbonate. Production of this mixture, often called calcium ammonium nitrate, essentially removes any explosion hazard. In many cases calcium nitrate recovered from acidulation of phosphate rock (see Phosphoric acid and the phosphates) is reacted with ammonia and carbon dioxide to give a calcium carbonate—ammonium nitrate mixture containing 21 to 26% nitrogen (23). 

Pintsch-Bamag s Continuous Process for Production of Calcium Ammonium Nitrate," Nitrogen (28), 28 (1964). 

This subsection discusses the production of ammonia, urea, ammonium sulfate, ammonium nitrate (AN), calcium ammonium nitrate (CAN), and ammonium sulfate nitrate (ASN). The manufacture of nitric acid used to produce nitrogenous fertilizers typically occurs on site and is therefore included here. 

The explosibility of the double salt, calcium ammonium nitrate, is enhanced by... 

The influence of nitrogen fertilizer source on the germination rate of ergots placed on the ground in rye culture has been studied. Compared with calcium ammonium nitrate, application of calcium cyanamide reduced the germination of ergots and formation of perithecia by 40-50% (Mielke, 1993). 

Pearl calcium cyanamide is able to reduce germination of ergots and formation of perithecia better than calcium ammonium nitrate in conventional farming. 

FYM Farmyard manure, (2) Extract of Urtica dioica shoots, (3) Calcium-ammonium-nitrate. 

CAN [calcium ammonium nitrate] A process for making calcium ammonium nitrate fertilizer. Developed by BASF (hence the alternative process name BASF/CAN) and engineered by Uhde. 

Calcium aluminate chloride, phase in Portland cement clinker, 5 472t Calcium aluminate fluoride, phase in Portland cement clinker, 5 472t Calcium aluminoferrite, phase in Portland cement clinker, 5 472t Calcium aluminoferrite hydrate, 5 477t Calcium—aluminum alloys, 4 530 Calcium amalgam, 22 773 Calcium ammonium nitrate, 2 724 Calcium analysis, of water, 26 37 Calcium A zeolite, separation of hydrocarbons by, 16 823 Calcium—barium—silicon alloy, 22 519 Calcium-bearing manganese silicon,... 

Other chemical fertilizers used as sources of nitrogen include ammonium nitrate, which contains approximately 35% nitrogen by weight. Calcium ammonium nitrate contains between 20.5 and 2897 nitrogen by weight. 

The potential of ammonia-based flue gas desulphurisation waste solution as a nitrogen fertiliser has been assessed by Gissel-Neilson and Bertelsen (1989) by field trials using barley and rye grass. The solution had the same fertiliser value as calcium-ammonium-nitrate. The toxic effects of sulphite were reduced by avoiding direct contact of the solution with the plants. 

Ammonium Nitrate Calcium Ammonium Nitrate Ammonia - Direct Application Nitrogen Solutions Mono- Ammonium Phosphate/ Di-Ammonium Phosphate Other NP compounds NK / NPK compounds Others3 Total nitrogen... 

The resulting AN solution may be handled in various ways103. It can be stored as a solution, used in down-stream plants or sold as a solution it can be formed into solid AN by prilling or granulation, or it can be mixed with a solid filler. The most common filler is calcium carbonate in the form of ground limestone, dolomite or by-product calcium carbonate. This product is known as Calcium Ammonium Nitrate (CAN) and can be prilled or granulated. Granular products that contain AN and either ammonium or calcium sulphate are also manufactured. 

The droplets crystallize and condense into hard, spherical prills that are dried, cooled, and sized for shipment. If calcium ammonium nitrate (CAN or nitro chalk) is made, ground calcium carbonate (limestone or dolomite) is added to the melt prior to the formation of the droplets when CAN is being made103 10S. 

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). 

In a comparison of how N fertilizers that also contained S affected the elemental composition of celery (Apium graveolens) grown on polluted marsh soil, Schnug and Schnier (1986) observed that with the use of ammonium sulfate (as compared with urea or calcium ammonium nitrate) there was a conspicuous increase in total S, accompanied by a significant decrease in Mo concentration of up to 80% (Figure 15.1). In soils that are inherently poor in available Mo, or where its availability is limited by acid conditions, addition of S fertilizer may further aggravate... 

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