Carbon Dioxide → Magnesium bicarbonate

HRID 2405531Notes

Reaction equation

HRID 2405531 reaction equation
[O-2:1].[Mg+2:2].[O-2].[Ca+2:4].[Mg].[O-2].[Ca+2].[C:8](=[O:10])=[O:9]>O>[C:8](=[O:1])([OH:10])[O-:9].[Mg+2:2].[C:8](=[O:1])([OH:10])[O-:9].[C:8](=[O:1])([OH:10])[O-:9].[Ca+2:4].[C:8](=[O:1])([OH:10])[O-:9]

Participants

7

Reactant 4

HCID 280Carbon DioxideHCID 6850728CalciumoxideHCID 6850729Magnesium monoxideHCID 131731770HCID 131731770, compound2×

Product 2

HCID 102204Magnesium bicarbonateHCID 10176262Calcium bicarbonate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent3×

Procedure

A mixture of magnesium oxide and calcium oxide, prepared from calcination of dolomite at 900° C. for 2 hours, is hydrated for 5 hours at 50° C. The weight ratio of water to magnesium/calcium oxide is 5:1. Then water is added into the mixture to prepare slurry at a weight ratio of water to magnesium/calcium oxide of 190:1. After that, carbon dioxide (75 vt %) is introduced into the slurry to react for 2 hours at 25° C. Subsequently, a pure aqueous solution of magnesium bicarbonate and calcium bicarbonate (MgO+CaO (90 wt % MgO): 5.1 g/L, Fe: 1.1 ppm, Al: 0.7 ppm) is obtained after clarification and filtration.

Workup

  1. customto react for 2 hours at 25° C

Sources & evidence

ORD record
ord-18701cc6807b4042979fcfd22b2c6d42
Source dataset
uspto-grants-2014_08
Patent number
US08808660B2

Reaction notes

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