Ammonia → Stearic Acid

HRID 354620

Reaction equation

HRID 354620 reaction equation
[O-2].[Zn+2:2].N.C(=O)=[O:5].[C:7]([OH:26])(=[O:25])[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH3:24]>O>[O-2:5].[Zn+2:2].[C:7]([OH:26])(=[O:25])[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH3:24].[C:7]([O-:26])(=[O:25])[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH3:24].[Zn+2:2].[C:7]([O-:26])(=[O:25])[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH3:24]

Participants

8

Reactant 4

HCID 222Ammonia2×HCID 280Carbon DioxideHCID 5281Stearic AcidHCID 3007857Zinc Oxide

Product 3

HCID 5281Stearic AcidHCID 11178Zinc StearateHCID 3007857Zinc Oxide

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Conditions

Temperature
80 °C

Procedure

130 kg of zinc oxide is dispersed in a rotor-stator shear machine with 16 liters of 25% aqueous ammonia in 480 liters of cold water with simultaneous introduction of gaseous carbon dioxide. Simultaneously, 900 kg of molten stearic acid is emulsified at 80° C. in 180 liters of water and to the emulsion there is added 36 liters of 25% aqueous ammonia. Both dispersions are fed at 80° C. through correspondingly adjusted dosing pumps to a rotor-stator shear machine likewise heated to 80° C., so that stoichiometric amounts are reacted per unit of time. From the 130 kg of zinc oxide and 900 kg of stearic acid (saponification number=204) there is formed 1000 kg of zinc stearate. The pasty zinc stearate drawn off from the rotor-stator shear machine has a water content of about 45%. It is fed directly to a flowing air dryer in which it is dried to a water content of 0.2%. The end product is a finely granular, extremely pure, electrolyte-free zinc stearate.

Workup

  1. customare fed at 80° C. through correspondingly adjusted dosing pumps to a rotor-stator shear machine
  2. customare reacted per unit of time

Sources & evidence

ORD record
ord-548ecfa34cb84a7d8c942fa974dd25bb
Source dataset
uspto-grants-1983_03
Patent number
US04376079

Linked notes

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