An uncommon Grade of acid

IHP uses low grade ores to produce high-quality phosphoric acid

acids
WAP phosphoric acid at the filter is low in concentration, about 26-28%, and high in dissolved and particulate impurities

  • SPA must be concentrated to 70%, solids and organics must be removed, and MgO levels must be low; the acid is expected to be bright green in color; SPA is significantly more costly than MGA
  • For PPA, a standard concentration is 61% and almost all impurities must be removed, with exact tolerances dependent on the downstream application (e.g. food is more stringent than detergents)
  • Many grades of WAP filter acid (e.g. based on Florida rock) cannot be upgraded owing to high levels of difficult-to-remove impurities

IHP phosphoric acid can be used “as is” for SPA and some PPA applications, giving access to higher quality product markets

  • IHP produces clean 70% acid directly, requiring no further processing for most high-value phosphoric acid applications
  • Higher grades of PPA will require additional “polishing” in which trace levels of impurities are removed through well established processes
  • The IHP technology will allow producers to access to SPA and PPA markets using grades of rock that cannot currently access these markets
  • More widespread production of SPA will permit wider adoption of liquid fertilizer techniques which permit more direct and less wasteful application of phosphate fertilizer nutrients

Transformational Technology

No Phosphogypsum - Valuable Co-product Instead