Stearic Acid → Zinc Stearate

HRID 2418659Notes

Reaction equation

HRID 2418659 reaction equation
[Zn:1].[C:2]([OH:21])(=[O:20])[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][CH2:18][CH3:19]>>[C:2]([O-:21])(=[O:20])[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][CH2:18][CH3:19].[Zn+2:1].[C:2]([O-:21])(=[O:20])[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][CH2:18][CH3:19]

Participants

3

Reactant 2

HCID 5281Stearic AcidHCID 23994Zinc

Product 1

HCID 11178Zinc Stearate

Procedure

To an aqueous solution of zinc chloride prepared by dissolving 22 g zinc chloride (containing 47.8% zinc) in 33 ml water, 300 g of a 9% aqueous acid sodium carbonate solution was added under stirring to produce an aqueous zinc carbonate dispersion containing 10.5 g zinc. This liquid was heated under stirring, and when the temperature reached 65° C., addition of granular stearic acid (melt initiating temperature 56° C.) was started. While the temperature was elevated over a 15-minute period, 90 g was added. When the addition was terminated, the temperature of the liquid was 72° C. Under slow heating, the reaction was continued for 40 minutes. When the reaction was accomplished, the temperature of the liquid was 76° C. Heating was then stopped, and zinc stearate generated in the upper layer of the reaction liquid was filtered off. It was washed with water 3 times, the quantity of water used for each time being 1000 ml. Thereafter, it was dried at 105° C. to obtain 100 g granular zinc stearate (melting point 120° C.) having an average grain diameter of about 1 mm. The zinc content of this product was 10.38%, and the yield relative to the zinc used was 98.9%.

Workup

  1. temperatureThis liquid was heated
  2. customreached 65° C.
  3. waitWhile the temperature was elevated over a 15-minute period
  4. addition90 g was added
  5. additionWhen the addition
  6. customwas terminated
  7. customwas 72° C
  8. customwas 76° C
  9. temperatureHeating
  10. customzinc stearate generated in the upper layer of the reaction liquid
  11. filtrationwas filtered off
  12. washIt was washed with water 3 times
  13. customThereafter, it was dried at 105° C.

Sources & evidence

ORD record
ord-a668b1f0ccab4651a6e367875da0dd0f
Source dataset
uspto-grants-1984_09
Patent number
US04473504

Reaction notes

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