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The conceptual foundation of the mild deoxychlorination (DOC) process was laid by Dr. Kirill Nikitin between 2016 and 2020. Its development was rapidly accelerated only in 2023 with crucial funding from Research Ireland. This investment provided the vital resources needed to foster an interdisciplinary collaboration between University College of Dublin's School of Chemistry and the School of Agriculture, moving the technology from a laboratory concept toward real-world application.
Entirely New Chemistry
Existing recovery methods
High energy demand and carbon footprint (P4)
Heavy metals and organic residue contamination (H3PO4)
SINFERT
Deoxychlorination (DOC) process
P is recovered as volatile POCl3 (phosphorus oxychloride)
Access to most phosphorus compounds and products
From different substrates (bone meal ash, ViviMag™) to soluble fertiliser
How Does It Work?
Mild conditions: 30–70 °C; ambient pressure.
Novelty: the key intermediate POCl3 was isolated by fractional distillation
Hydrolysed POCl3 furnished white phosphoric acid
Efficiency: >90% extraction from various sources
Validated in industrial setting ( >90%, kg scale)
Up to 75% potential reduction in GHG emissions
High-purity products
After neutralisation with NH3, extra pure MAP and DAP fertilisers were obtained
Sub-ppm levels of metals: Na-Pb
Equivalent performance to conventional MAP and DAP
Treatment with phenol gives pure triphenylphosphate (flame retardant)
Reaction with Grignard reagent leads to phosphine oxides (pharma)
Winter wheat: no fertiliser (left) and SINFERT DAP (right)
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