Sulfuric acid magnesium salt (1:1) → Calcium Sulfate

HRID 1389756Notes

Reaction equation

HRID 1389756 reaction equation
[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[Mg+2:6].[OH-:7].[Ca+2:8].[OH-]>>[OH-:2].[Mg+2:6].[OH-:7].[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[Ca+2:8]

Participants

4

Reactant 2

HCID 24083Sulfuric acid magnesium salt (1:1)HCID 6093208Calcium Hydroxide

Product 2

HCID 24497Calcium SulfateHCID 73981Magnesium Hydroxide

Procedure

In the reactor tank, the soluble magnesium sulfate reacted with the calcium hydroxide to produce magnesium hydroxide and calcium sulfate, both of low solubility. The effluent from the reactor tank was pumped to the recycle tank at a rate of about 2.5 gpm. Conveniently, the addition of the hydrated dolomitic lime and hydrated lime may be followed by the pH of the mixture in the reactor tank, with the pH in the reactor tank varying between 9 and 10, which provides a pH in the recycle tank of between about 6 and 7.

Sources & evidence

ORD record
ord-203f4159dde646c4a115af85293a83c8
Source dataset
uspto-grants-1981_01
Patent number
US04246245

Reaction notes

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