Carbon Dioxide → Magnesium bicarbonate

HRID 2405536Notes

Reaction equation

HRID 2405536 reaction equation
[O-2:1].[Mg+2:2].[C:3](=[O:5])=[O:4]>O>[C:3](=[O:1])([OH:5])[O-:4].[Mg+2:2].[C:3](=[O:1])([OH:5])[O-:4]

Participants

4

Reactant 2

HCID 280Carbon DioxideHCID 6850729Magnesium monoxide

Product 1

HCID 102204Magnesium bicarbonate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

Sodium hydroxide (30%) is added into a magnesium nitrate solution (5.0 mol/L, MgO content: 200 g/L) at a molar ratio of sodium to magnesium of 2. Controlling the reaction for 25 minutes at 20° C., a magnesium hydroxide slurry can be obtained. After filtration, a filter cake of magnesium hydroxide is obtained. Then water is added into the filter cake to prepare slurry at a weight ratio of water to magnesium oxide of 30:1. After that, carbon dioxide (90 vt %) is introduced into the slurry to carry out carbonation at 25° C. Subsequently, a magnesium bicarbonate solution (MgO: 30 g/L, Fe: 0.3 ppm, Al: 0.4 ppm) is obtained after clarification and filtration.

Workup

  1. customat 25° C

Sources & evidence

ORD record
ord-0f138255849d4fc1b2da3b2e8292abac
Source dataset
uspto-grants-2014_08
Patent number
US08808660B2

Reaction notes

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