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Fertiliser Technology

Fertiliser Technology
Ammonia synthesis gas is produced from fuel oil by

Partial oxidation
Steam reforming
Hydrogenation
Hydrocracking

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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

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

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Fertiliser Technology
Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

800-900
50-80
250-400
1000-1200

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Fertiliser Technology
__________ is not a fertiliser.

Liquid ammonia
Ammonium sulphate
Calcium ammonium nitrate
Ferrous sulphate

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Fertiliser Technology
Temperature and pressure in ammonia converter is

200 atm, 1000°C
450 atm, 1000°C
450 atm, 200°C
450 atm, 550°C

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Fertiliser Technology
Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

Decreasing the temperature
Increasing the temperature
None of these
Decreasing the pressure

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