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Thanks to our variety of processes, we can place at your disposal a wide range of technologies to produce different types of phosphoric acid, feed phosphates and fertilizer phosphates to suit your specific applications.

Fertilizer phosphates

Merchant grade acid

Merchant Grade Acid (M.G.A.), the market standard phosphoric acid quality, is the basis for fertilizer production (MAP, DAP, NPK’s, TSP).

Prayon offers five processes to produce phosphoric acid from phosphate rock or DCP super-rock.

Based on the chemical analysis of the rock and discussions about your project, Prayon will guide you to the optimum process. During the pilot test phase, the process conditions will be adjusted to improve P2O5 recovery and filtration rate.


DCP fertilizer

DCP – Dicalcium Phosphate or Super rock, is a key intermediate in phosphate production that can be used in the production of high-quality low cadmium fertilizers (SSP, TSP, CSP, WPPA).

DCP super-rock can also be converted into high-quality phosphoric acid directly suitable for fertigation and the production of water-soluble fertilizers (NPK, MAP, DAP).  Instead of requiring a high-quality or treated phosphoric acid, Prayon offers two high value-added processes that can convert a low-grade rock directly into a DCP fertilizer or super-rock.

Our solutions:

GetMoreP H2SO4 -based technology 

Ecophos HCl-based technology

Animal feed phosphates

Dicalcium Phosphate

DCP, Dicalcium Phosphate, a pure and concentrated form of phosphate, is highly bio digestible (up to 82%) and ensures a healthy bone structure.

Instead of requiring a high-quality or treated phosphoric acid, Prayon offers two high value-added processes that can convert a low-grade rock directly into a DCP animal feed-grade.

Our solutions:

Ecophos HCl-based technology

GetMoreP H2SO4 -based technology 


Monocalcium Phosphate

MCP, Monocalcium Phosphate Monohydrate, Ca(H2PO4)2. H2O, a granular phosphate source, makes cattle and poultry food more digestible and improves their bone structure.

MCP can be produced by mixing phosphoric acid with a calcium source (calcium carbonate or calcium hydroxide) or DCP.

Our solution:
MCP Technologies

Technical grade phosphoric acid

Technical grade phosphoric acid is used in the steel industry, water-soluble fertilizers, flame retardants and fire extinguishers.

Every technical application has its own norm for technical grade phosphoric acid. Prayon’s wide range of technologies enables the production of technical grade phosphoric acid to meet all our customer’s needs.

Through one of the DCP processes offered by Prayon, you can produce a pure DCP from a phosphate source that can be used as a raw material (super-rock) to feed a phosphoric acid plant. The resulting phosphoric acid will be technical grade, as the DCP process acts like a chemical beneficiation.


Food grade Phosphoric acid

Food grade phosphoric acid improves the quality and nutritional value of food and beverages. Our unique purification process enables the production of a highly qualitative food grade phosphoric acid that meets international specifications.

We can use either green phosphoric acid or phosphoric acid generated from pure DCP.

Our solution:

Membrane Purification process


With a clear focus on the circular economy, our teams keep innovating day in, day out to  make a valuable product from gypsum, the main co-product from the phosphoric acid  production.

Prayon provides no less than three processes to produce phosphoric acid and, at the same time, a gypsum co-product suitable for the cement or plaster industry.

Additionally, our Ecophos process enables the production of DCP and recycled hydrochloric acid by adding sulfuric acid – leading to a pure gypsum co-product.

Our solutions:

Phosphoric Acid Technologies

Ecophos HCl-based technology

For each desired quality and purity of gypsum, we can offer our customer the right process.


Calcium chloride

Solid calcium chloride is used  in various applications such as de-icing, dedusting or oil drilling.

The Calcium chloride, a pure co-product from the Ecophos process, is first concentrated to a solution of 35% CaCl2.  After further concentration and drying, it is turned into 76% CaCl2 flakes or 96% CaCl2 granules.

Trace elements

Prayon Technologies can propose different processes such as the Uranium recovery process to recover some trace elements from gypsum or from phosphoric acid.


To protect the environment from undesirable pollutants (liquid effluents or gaseous emissions), Prayon has developed an efficient way to clean the gases from the various sections of a phosphoric acid plant.

Additionally, a part of the fluorine from the rock can be recovered at the concentration stage of the acid. Prayon offers a technology for this purpose that recovers the fluorine as a fluosilicic acid solution from 14 to 25%, depending on the anticipated application.

Our solutions:

Gas Scrubbing Process

Fluorine Recovery Process