Production of ammonium phosphates

An arrangement (100) for production of fully soluble, pure and well defined mono-or di-ammonium phosphates, comprises an extraction section (10), a stripping section (20) and end treatment arrangements (90). The extraction section performs a liquid-liquid extraction of phosphate between a feed liqui...

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Bibliographic Details
Main Authors ENFALT, PATRIK, COHEN, YARIV
Format Patent
LanguageEnglish
Published 22.01.2015
Subjects
CHEMISTRY
COMPOUNDS THEREOF
FERTILISERS
INORGANIC CHEMISTRY
MANUFACTURE THEREOF
METALLURGY
NITROGENOUS FERTILISERS
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHOSPHATIC FERTILISERS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:An arrangement (100) for production of fully soluble, pure and well defined mono-or di-ammonium phosphates, comprises an extraction section (10), a stripping section (20) and end treatment arrangements (90). The extraction section performs a liquid-liquid extraction of phosphate between a feed liquid (1) comprising phosphoric acid and being essentially free from nitrate ions, and a solvent (5) having a solubility in water of less than 2%. The stripping section performs a liquid-liquid extraction of phosphate between solvent loaded with phosphate and a strip solution (4). The solvent depleted in phosphate is recirculated to the extraction section for further extraction of phosphate. The strip solution is an aqueous ammonium phosphate solution, wherein at least 80% of the ammonium phosphate is monoammonium phosphate and/or wherein the solvent is a water-immiscible alcohol. The end treatment arrangements comprise a source of ammonia (60), an adding arrangement (70), a cooling arrangement (50), a precipitate remover (40) and a recirculation system (80).
Bibliography:Application Number: AU20130277841