Carbon Dioxide → Magnesium bicarbonate

HRID 1022283

Reaction equation

HRID 1022283 reaction equation
[OH-:1].[Mg+2:2].[OH-].[C:4](=[O:6])=[O:5]>O>[C:4](=[O:1])([OH:6])[O-:5].[Mg+2:2].[C:4](=[O:1])([OH:6])[O-:5]

Participants

4

Reactant 2

HCID 280Carbon DioxideHCID 73981Magnesium Hydroxide

Product 1

HCID 102204Magnesium bicarbonate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

The calcium oxide powder is digested by water at liquid to solid ratio of 2.5:1 (calculated by the weight of water and calcium oxide) for 60 mins at 80° C. to get calcium hydroxide slurry, and then brine is added by Ca/Mg molar ratio of 1.2:1 for a 60 minutes reaction at 25° C. to get magnesium hydroxide slurry which is then filtered to get magnesium hydroxide cake. The magnesium hydroxide cake is mixed with water at liquid to solid ratio of 50:1 (calculated by the weight of water and magnesia), and then carbon dioxide gas is introduced into it to carbonize continuously at 20° C. Aqueous solution of magnesium bicarbonate (MgO: 18.6 g/L, Fe: 1.7 ppm, Al: 0.3 ppm) is obtained after filtration.

Workup

  1. additionis introduced into it
  2. customto carbonize continuously at 20° C

Sources & evidence

ORD record
ord-b7444e0b825842978a037ed156d36983
Source dataset
uspto-grants-2014_05
Patent number
US08721998B2

Linked notes

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