Exploring Ammonium Phosphates in Global Agriculture

1041 Words3 Pages

2015
Ammonium Phosphates A Profile (World)

Ammonium phosphates, utilized as fertilizers, are the result of the reaction of phosphoric acid and ammonia. About 3% of Ammonium phosphate is used as animal feed and for industrial application and diammonium phosphate is used as phosphate fertilizer. The N-P-K ratio of 18-46-0 and good handling properties make it ideal for small and large-scale agriculture. The combination of 1,175 tons of phosphoric acid with 40% P2O5 and 0.23 tons of ammonia give a ton of DAP which mean that about one ton of sulphur is required. The phosphate sector is dominated by the DAP trade, affecting prices and production. The manufacture of DAP, which is used mainly in mass blending, involves the use of about 35-40 percent of the global production of phosacid. Over 40% of the DAP’s global production is sold across borders, beating ammonia. To get a ton of MAP or monoammonium phosphate, …show more content…

The usual target of beneficiation process is 35% P2O5 from 28%. The use phosphate rock as fertilizer is limited, since the solubility of it in acidic soil is a deciding factor. The rock needs to undergo a mineralogical test to ascertain the suitability depending on its chemical composition and structure. The carbonate radical contributes to P2O5 reactivity when it is directly applied on the rock.

At times, partial acidulation or PAPR of the rock happens when the rock’s insoluble tricalcium phosphate is converted into a combination of citrate-soluble dicalcium phosphate and water-soluble monocalcium phosphate. The various acids used include carobonic, nitric, phosphoric, acetic, citric, hydrochloric and sulphuric acids. The degree of acidulation rests on elements such as the nature of acid, ratio of acid and rock, reaction time, temperature and ration of non-apatite and apatite

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