Sulfate Ion → HCID 129697789, compound

HRID 443785Notes

Reaction equation

HRID 443785 reaction equation
[Cl-].[Li+].[B:3].[Mg].S([O-])([O-])(=O)=[O:6].[OH-:10].[Ca+2:11].[OH-:12]>[Cl-].[Na+].O>[OH2:6].[B:3]([O-:6])([O-:12])[O-:10].[Ca+2:11].[B:3]([O-:6])([O-:12])[O-:10].[Ca+2:11].[Ca+2:11]

Participants

7

Reactant 5

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

Product 1

HCID 129697789HCID 129697789, compound

Reagents, catalysts & solvents 1

HCID 57417360Sodium chloride; waterSolvent

Procedure

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 to precipitate magnesium as magnesium hydroxide, and then treated with a sufficient amount of a 20% solution of calcium chloride to form calcium borate hydrate. At pH 11, only gypsum precipitated and the boron concentration of the brine, after separation of the precipitated material, was reduced to 0.15%B due to dilution effect.

Workup

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

Sources & evidence

ORD record
ord-d235007b06874fe2bae5fb72872ecde9
Source dataset
uspto-grants-1981_04
Patent number
US04261960

Reaction notes

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