Lactic Acid → Calcium hexalactate

HRID 894147Notes

Reaction equation

HRID 894147 reaction equation
[C:1]([OH:6])(=[O:5])[CH:2]([CH3:4])[OH:3].C(=O)([O-])[O-].[Ca+2:11]>O>[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[Ca+2:11].[Ca+2:11].[Ca+2:11]

Participants

4

Reactant 2

HCID 612Lactic Acid2×HCID 10112Calcium Carbonate

Product 1

HCID 86737918Calcium hexalactateYield 264.8%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

30 kg of 80% synthetic lactic acid are dissolved in 66 kg of water and refluxed for 15 hours. Next, 4.4 kg of calcium carbonate are added to the approximately 25% solution of lactic acid at a temperature of about 70° C., while stirring, and the clear solution is finally dried in a thin-layer evaporator at about 80° C. and 25-50 torr vacuum. 25.4 kg of pourable calcium hexalactate are obtained, corresponding to 98.9% of the theoretical quantity.

Workup

  1. temperaturerefluxed for 15 hours
  2. customthe clear solution is finally dried in a thin-layer evaporator at about 80° C.

Sources & evidence

ORD record
ord-94480aee9a554322a7a49652fffbabf0
Source dataset
uspto-grants-1981_08
Patent number
US04282385

Reaction notes

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