Phosphate Fertilizer Production-From the 1830's to 2011 and Beyond

摘要

In 1835 Gotthold Escher pointed out the value of bone as a fertilizer and suggested a "cheap and not too strong acid" to decompose the bones before applying to the soil. Later in 1840, the Duke of Richmond stated that the fertilizer value of bones was due to.the phosphoric acid that they contained. In that same year, Justus Von Leibig added sulfuric acid to crushed bones to make them more soluble and proved that phosphate of lime and not gelatin was the fertilizing agent in the material. In 1843 he proved that phosphate of lime performed identically whether obtained from bones or phosphate rock.