Our group 
History
Formation on 15 May 1882 of Société Anonyme Métallurgique de Prayon (at Engis, near Liège, Belgium), the largest zinc producer in Belgium. 200 employees.
First sulfuric-acid production unit using the lead-chamber process.
First industrial activities at the Puurs production site (near Antwerp, Belgium).
Agreement with Atlantic Refining Co. to produce "MIR", a very popular detergent in Belgium, at Engis. This requires the use of concentrated sulfuric acid, of which Prayon is a major producer.
A 25 T/day diammonium phosphate manufacturing facility is launched, with prospective outlets outside the fertilizer sector.
A new phosphate-based activity is started at Puurs. The plant sources phosphate from Morocco.
The methods for manufacturing commercial-grade gypsums (a by-product of phosphoric acid manufacture) have now been fully developed at both Engis and Puurs.
Prayon creates a new Research and Development Division.
Production activities at the Puurs and Engis sites are merged and the Prayon-Rupel Chemical Company (Prayon for short) is created. Prayon is our parent company and is based in Engis. Main areas of activity: phosphate chemicals (phosphoric acid and derived salts) and specialty inorganic chemicals (zinc oxide, sodium hydrosulfite, fluorine salts and anticorrosion pigments).
Founding of Silox, a company manufacturing active zinc oxides.
We help to create Europhos, a company whose production unit in France (Les Roches de Condrieu, Lyon) becomes the Prayon Group's third production centre in Europe after Engis and Puurs.
In partnership with our shareholder OCP (Office Chérifien des Phosphates), the world's leading producer of phosphoric acid and also holder of the world’s largest reserves of phosphate ore, we establish Emaphos (Morocco), a company specializing in the purification of phosphoric acid.
We acquire all of the shares in Europhos.
Prayon Inc. is established and acquires phosphate salt production units in Augusta (Georgia, USA).
Our zinc and sulfur activities are transferred to our subsidiary Silox, making it a global group with plants in Europe, India and Canada.
Europhos is incorporated into Prayon S.A. The Europhos brand name is retained as a recognized symbol of high-quality products acknowledged by our customers.
Sales office opened in China.
Sales office opened in India.
Cooperation agreement with ALMIN allowing Prayon to expand its product range, particularly in the field of refractory.
Formation of SOLUSTEP, a 50/50 joint venture with French company Dupuy SAS, specializing in wastewater treatment.
