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Fertiliser Technology

Fertiliser Technology
__________ is not a fertiliser.

Liquid ammonia
Ammonium sulphate
Ferrous sulphate
Calcium ammonium nitrate

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Fertiliser Technology
Fertiliser plants get their N₂ requirements

From producer gas
By fractionation of liquified air
By dissociating oxides of nitrogen
From coal gas (coke oven gas)

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Fertiliser Technology
In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process

Uses lower grade phosphate rock
Is very costly
Produces lower purity acid
Requires lower capital investment in the plant

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Fertiliser Technology
Reaction of calcium fluorapatite with sulphuric acid produces

Red phosphorous
Ortho-phosphoric acid
Simple superphosphate
Triple superphosphate

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Fertiliser Technology
Tricresyl phosphate is chemically represented as

NH₄H₂PO₄
Ca₁₀(PO₄)3F₆
(CH₃ C₆ H₄)₃ PO₄
(NH₄)₂HPO₄

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Fertiliser Technology
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.

950-1050
1400-1450
500-750
250-300

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