Hasan al-Rammah

Full name: 
Hasan al-Rammah
Date of death: 
1295
Hasan al-Rammah was a thirteenth century military engineer (d. 1294-1295 CE) who, described in his book al-furusiyya wa al-manasib al-harbiyya (The Book of, Military Horsemanship and Ingenious War Devices) the first process for the purification of potassium nitrate.