ES243515A1 - A procedure for direct manufacture of concentrated phosphoric acid (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for direct manufacture of concentrated phosphoric acid (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Compagnie de Saint Gobain SA
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Compagnie de Saint Gobain SA
Manufactures des Glaces et Produits Chimiques de Saint Gobain SA
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Priority to ES0243515ApriorityCriticalpatent/ES243515A1/en
Publication of ES243515A1publicationCriticalpatent/ES243515A1/en
Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals
(AREA)
Abstract
A direct manufacturing process of the concentrated phosphoric acid, characterized in that it consists in effecting the sulfuric attack of the natural phosphate and precipitation of the lime in the form of gypsum SO 4 Ca 2 H 2 O within the reaction mass, which comprises, in particular, the concentrated phosphoric acid produced by said phosphoric acid. attack, maintaining the temperature of the mase reaction in the vicinity of 75 degrees Celsius, practically between 70 and 80 degrees Celsius, and regulating the introductions of phosphate and sulfuric acid so that the percentage of SO4 ions of the liquid phase in the vicinity of 30 grams per liter, practically between 25 and 35 grams, the resulting acid comprising a percentage of P2O5 comprised between 35 and 45 percent. (Machine-translation by Google Translate, not legally binding)
ES0243515A1958-08-081958-08-08A procedure for direct manufacture of concentrated phosphoric acid (Machine-translation by Google Translate, not legally binding)
ExpiredES243515A1
(en)
Continuous procedure for the preparation of superfosforic acid through thermal treatment of orthophosphoric acid. (Machine-translation by Google Translate, not legally binding)
Process for the preparation of calcium nitrate, pure monoammonium phosphate and a nitrogen- and phosphoric acid-containing fertilizer by digestion of crude phosphate with nitric acid.
A perfection in the procedures of a manufacture of phosphorus-nitrogen fertilizers, and device for their realization (Machine-translation by Google Translate, not legally binding)