Stearic Acid → Zinc Stearate

HRID 2120293Notes

Reaction equation

HRID 2120293 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].[O-2].[Zn+2:22]>C(O)(=O)CC(CC(O)=O)(C(O)=O)O.CCCCC(CCC(OS([O-])(=O)=O)CC(C)C)CC.[Na+].O>[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].[Zn+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

6

Reactant 2

HCID 5281Stearic AcidHCID 3007857Zinc Oxide

Product 1

HCID 11178Zinc StearateYield 99.4%

Reagents, catalysts & solvents 3

HCID 311Citric AcidCatalystHCID 23665772Sodium Tetradecyl SulfateCatalystHCID 962WaterSolvent

Conditions

Temperature
65 °C

Procedure

A molten stearic acid (29.5 grams, Hystrene 7018) was added gradually to a stirred mixture of zinc oxide (4.9 grams), citric acid (0.06 gram), Tergitol 15-S-7 (0.35 gram) and water (66 grams) at 65° C. The reaction mixture was stirred at 60-70° C. for one hour, cooled to 25° C., filtered and dried to give 32.6 grams (99.1% yield) of zinc stearate white powder that showed 0.08% water, 13.6% ash, 0.49% by weight of free fatty acid, and a melting point of 126° C.

Workup

  1. temperaturecooled to 25° C.
  2. filtrationfiltered
  3. customdried

Sources & evidence

ORD record
ord-c4822ebb5f5149d49566a19cf597977c
Source dataset
uspto-grants-2004_02
Patent number
US06689894B1

Reaction notes

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