Producing Phosphate Fertilisers & Industrial vs Laboratory Fertiliser

What is produced when phosphate rock is treated with nitric acid?

Calcium nitrate and phosphoric acid.

What is produced when phosphate rock is treated with sulfuric acid?

Calcium sulfate and calcium phosphate salts, including calcium dihydrogen phosphate.

What is produced when phosphate rock is treated with phosphoric acid?

Calcium phosphate salts, including calcium dihydrogen phosphate.

How are fertilisers commonly prepared in a laboratory?

By reacting suitable acids and bases or other compounds, followed by purification or crystallisation where appropriate.

How does industrial fertiliser production differ from laboratory preparation?

Industrial production uses large-scale, integrated and often continuous processes.

Why are industrial fertiliser processes integrated?

Products from one process can be used as raw materials in another, improving efficiency and reducing waste.

Why is the Haber process important for fertiliser manufacture?

It produces ammonia, which is a starting material for many nitrogen-containing fertilisers.

Why might an industrial process use different conditions from a laboratory process?

Industry must consider cost, energy consumption, production rate, yield and the availability of raw materials.

Why is it important to control the composition of NPK fertilisers?

Different crops and soils require different proportions of nutrients, so the formulation must provide appropriate amounts.