Stearic Acid → Magnesium Stearate

HRID 2035322Notes

Reaction equation

HRID 2035322 reaction equation
[C:1]([OH:20])(=[O:19])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18].[OH-].[Mg+2:22].[OH-]>C(O)C>[C:1]([O-:20])(=[O:19])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18].[Mg+2:22].[C:1]([O-:20])(=[O:19])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18]

Participants

4

Reactant 2

HCID 5281Stearic AcidHCID 73981Magnesium Hydroxide

Product 1

HCID 11177Magnesium Stearate

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

1,422 parts of stearic acid is added to 10,000 parts of ethanol, and mixed together at 75° C. 298 parts of magnesium hydroxide is gradually added to the mixture, and mixed for one hour after completion of the addition. The resultant mixture is cooled to 20° C., and the reaction product is filtered to remove ethanol and reaction residue. The obtained reaction solid product is dried at 150° C. for 3 hours using a heating vacuum drier. The product is taken out from the drier, and is allowed to stand for cooling, as a result of which a solid product of magnesium stearate is obtained. The obtained solid product is milled and classified in a similar manner to the production of zinc stearate particles 1, and further classified in a similar manner to the production of zinc stearate particles 6, as a result of which magnesium stearate particles 1 are obtained. The particle size distribution of the obtained magnesium stearate particles 1 is shown in Table 1.

Workup

  1. additionmixed together at 75° C
  2. additionmixed for one hour
  3. additionafter completion of the addition
  4. filtrationthe reaction product is filtered
  5. customto remove
  6. customethanol and reaction residue
  7. customThe obtained reaction solid product
  8. customis dried at 150° C. for 3 hours
  9. temperaturefor cooling

Sources & evidence

ORD record
ord-9e544cc154dc42f5ad17d5cdf6644cba
Source dataset
uspto-grants-2013_11
Patent number
US08574800B2

Reaction notes

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