Carbon Dioxide → Calcium bicarbonate

HRID 2405526Notes

Reaction equation

HRID 2405526 reaction equation
[O-2:1].[Mg+2].[O-2].[Ca+2:4].[C:5](=[O:7])=[O:6]>O>[C:5](=[O:1])([OH:7])[O-:6].[Ca+2:4].[C:5](=[O:1])([OH:7])[O-:6]

Participants

5

Reactant 3

HCID 280Carbon DioxideHCID 6850728Calciumoxide3×HCID 6850729Magnesium monoxide3×

Product 1

HCID 10176262Calcium bicarbonate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent4×

Procedure

The said calcination process is to calcine the minerals at 700˜1000° C. for 1˜5 hours. The said hydration process is to add water into the magnesium oxide and/or calcium oxide obtained from the calcination to carry out hydration, the hydration temperature is 50˜95° C., the hydration time is 0.5˜5 hours, and the weight ratio of water to magnesium oxide and/or calcium oxide is 1˜5:1, and subsequently, water is further added to prepare slurry at the weight ratio of water to magnesium oxide and/or calcium oxide of 10˜200:1. The said carbonation process is performed after the hydration, carbon dioxide is pumped into the slurry to carry out carbonation, the temperature is controlled at 0˜50° C., the reaction time is 0.1˜5 hours. And after filtration, pure magnesium bicarbonate and/or calcium bicarbonate solution is obtained.

Workup

  1. customat 700˜1000° C.
  2. customfor 1˜5 hours
  3. customobtained from the calcination
  4. customis 50˜95° C.
  5. waitthe hydration time is 0.5˜5 hours
  6. customis controlled at 0˜50° C.
  7. waitthe reaction time is 0.1˜5 hours
  8. filtrationAnd after filtration, pure magnesium bicarbonate

Sources & evidence

ORD record
ord-693dfcead77e473793864cbb330c2349
Source dataset
uspto-grants-2014_08
Patent number
US08808660B2

Reaction notes

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