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Expired
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GB23089/58A
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Montedison SpA
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Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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Application filed by Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpAfiledCriticalMontedison SpA
Publication of GB838768ApublicationCriticalpatent/GB838768A/en
C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
C01D5/12—Preparation of double sulfates of magnesium with sodium or potassium
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Chemical & Material Sciences
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Organic Chemistry
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Engineering & Computer Science
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Materials Engineering
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Inorganic Chemistry
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
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Abstract
Kainite mineral containing sodium chloride as an impurity and consisting of particles at least 90% of which are less than 0.1 mm. in size, is slowly added, with insufficient stirring to create turbulence, to a sulphate mother liquor, whereby there are formed Schoenite crystals of increased particle size together with sodium chloride crystals of the original size; the crystals are classified to separate the Schoenite and sodium chloride. The sulphate mother liquor is that remaining when Schoenite is treated with water to obtain potassium sulphate. Preferably an aliphatic amine or a salt thereof is added to the mother liquor to promote the growth of the Schoenite crystals: amines specified are 3 : 5 : 5 - trimethylhexylamine, 4 : 6 : 6 - trimethylheptylamine and 3 : 5 : 5-trimethylhexyloxy-n-propylamine and salts specified are acetate and hydrochloride. Specifications 752,109 and 774,313 are referred to.
GB23089/58A1957-07-221958-07-18Method of obtaining schoenite from kainite mineral
ExpiredGB838768A
(en)
Method of treatment of minerals containing potassic chloride and also sulfate and magnesium (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of hydrationed potassium-magnesium sulfate and potassic sulphate (Machine-translation by Google Translate, not legally binding)