Prayon

Process & contact 

Prayon

https://technologies.prayon.com/our-processes/fly-ash/

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Updated 01/24

Input materials

Phosphorus-containing incineration ashes, or low-grade phosphate rock.

Output products

DCP (Di Calcium Phosphate) or phosphoric acid.

Process description

Prayon is developing three processes:

GetMore P: attack with dilute sulphuric acid, production of DCP.

Ecophos DCP: attack with hydrochloric acid, production of DCP.

Prayon Ecophos LooP Process (PELP): attack of ashes with phosphoric acid, purification (using ion exchange) and production of tchnical grade phosphoric acid. Aluminium chloride and iron chloride solutions can be recovered for recycling as a sewage treatment coagulant. The ultimate source of the acidity is HCl.

Operating status

Semi-industrial pilot plant in Varna, Bulgaria (photo), 200 kg/h input ash, can operate the three processes (acquired from Ecophos, see www.phosphorusplatform.eu/Scope120 )