Sulfate Ion → Calcium Sulfate Dihydrate

HRID 443786

Reaktionsgleichung

Reaktionsgleichung von HRID 443786
[Cl-].[Li+].[B:3].[Mg].[S:5]([O-:9])([O-:8])(=[O:7])=[O:6].[OH-:10].[Ca+2:11].[OH-:12]>[Cl-].[Na+].O>[B:3]([O-:6])([O-:12])[O-:10].[B:3]([O-:6])([O-:12])[O-:10].[B:3]([O-:6])([O-:12])[O-:10].[B:3]([O-:6])([O-:12])[O-:10].[Ca+2:11].[Ca+2:11].[Ca+2:11].[Ca+2:11].[Ca+2:11].[Ca+2:11].[OH2:6].[OH2:6].[S:5]([O-:9])([O-:8])(=[O:7])=[O:6].[Ca+2:11]

Komponenten

8

Edukt 5

HCID 1117Sulfate IonHCID 433294Lithium ChlorideHCID 5462224MagnesiumHCID 5462311BoronHCID 6093208Calcium Hydroxide

Produkt 2

HCID 24928Calcium Sulfate DihydrateHCID 22238541Calcium tetra borate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 57417360Sodium chloride; waterLösungsmittel

Versuchsvorschrift

A brine containing 0.77% lithium in the form of lithium chloride, and 0.28% boron, as well as magnesium and sulfate impurities, was treated with a slurry of slaked lime to a pH of 11.2 to precipitate magnesium as magnesium hydroxide and then treated with a sufficient amount of a 20% solution of calcium chloride to form calcium tetra borate (CaB2O4.6H2O), and gypsum. At pH 11.2, only gypsum precipitated and boron was reduced to 0.15%B due to a dilution effect. Upon concentrating the brine by evaporation, to 40% Li, calcium tetraborate hydrate precipitated and the boron was maintained at 0.13%B.

Aufarbeitung

  1. customto precipitate magnesium as magnesium hydroxide
  2. additiontreated with a sufficient amount of a 20% solution of calcium chloride

Quellen und Nachweise

ORD-Eintrag
ord-79e30cea6502495a9a5df975b136fb91
Quelldatensatz
uspto-grants-1981_04
Patentnummer
US04261960

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