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Foret SA
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Foret SA
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Application filed by Foret SAfiledCriticalForet SA
Priority to ES227297ApriorityCriticalpatent/ES227297A3/en
Publication of ES227297A3publicationCriticalpatent/ES227297A3/en
Process for obtaining sodium tripolyphosphate, consisting essentially of subjecting the phosphorite mineral previously reduced to powder, to a treatment by sulfuric acid in appropriate tanks, in whose reaction phosphoric acid is formed and lime sulphate and other insoluble impurities are precipitated, which they are separated by means of filtering in a vacuum rotary filter, followed by the neutralization of the separated liquid by means of a treatment with an alkali, such as sodium carbonate, and in this operation new impurities are precipitated which are also separated by means of a filtrate. Convenient. (Machine-translation by Google Translate, not legally binding)
ES227297A1956-03-091956-03-09Manufacturing procedure of sodium tripolyphosphate. (Machine-translation by Google Translate, not legally binding)
ExpiredES227297A3
(en)