Process & contact
Recophos Thermal
This process is no longer under development and has been partially integrated into Flashphos
Input materials
Input: sewage sludge incineration ash, from sewage works using biological and/or chemical P-removal
Output products
White phosphorus (elemental phosphorus P4), Critical Raw Material for electronics and organo-phosphorus chemical industry
Process description
Initial patent Patent SGLCarbon, acquired by Italmatch.
Electrical induction heated InduCarb reactor, heats ash with coke or graphite to 1500°C. P4 (elemental P) is released in gas form, which can be reacted to PCl3 (chemical vector for industrial organic phosphorus chemistry) or to high purity phosphoric acid (electronics grade).
Operating status
10 kg/h input pilot was tested at Leoben, Austria in 2015 (EU FP7 project)