INSTALLATION FOR PURIFICATION AND DECOLORATION OF EXTRACTION PHOSPHORIC ACID Russian patent published in 2007 - IPC C01B25/234 

FIELD: inorganic materials technologies.

SUBSTANCE: invention relates to hardware provision for production of purified phosphoric acids used in production of phosphates of different degree of quality. Installation for purification and decoloration of extraction phosphoric acid has plate-type concentrator-defluorinator provided with air-cooling plate chamber and combustor coupled with it (gas outlet of concentrator-defluorinator is connected over absorber to tail fan), collectors, and acid supply and acid removal devices. To concentrator-defluorinator are consecutively connected acid decoloration absorber filled with solid adsorbent, desulfatization reactor, and settler, while gas outlets of indicated apparatuses communicate with gas outlet of concentrator-defluorinator. Concentrator-defluorinator outlet is connected to reactor inlet and clarified acid outlet is connected to adsorber inlet, whose clarified acid outlet is provided with conduit for transportation of acid to storehouse.

EFFECT: improved quality of product due to more intensive purification eliminating inorganic and organic impurities and reduced specific power expenses per unit of eliminated impurities.

2 cl, q dwg