-:Manufacturing Processes of Metallic Stearates:-
At Mittal Dhatu Rashayan Udyog, we manufacture Metallic Stearates
employing several processes, according to end use requirement of
products and their specific properties. We use quality raw materials
which suit to the specific requirement of each manufacturing process.
(1) Precipitation Process:
Stearic Acid is heated to melt in excess of water and saponified with
equimolar quantity of strong alkali solution ( KOH, NaOH etc) to give
a water soluble soap ( Potassium/Sodium Stearate) and water. This
mix is then reacted with desired product's metal salt solution
(Calcium Chloride / Aluminium Sulphate etc. ) to obtain desired
stearate and a water soluble salt.
2C17H35COOH + 2KOH ► 2C17H35COO-K+ + 2H2O
2C17H35COO-K+ + X2+2Y- ► (C17H35COO-)2X2+ + 2KY
(Y = Cl- , ½SO42- etc.)
(2) Direct Process :
Stearic Acid is directly reacted to desired product's metal salt with or
without presence of catalyst under pressure and high temperature to
give desired stearate without any byproduct. Resultant is high quality
product with fewer impurities.
2C17H35COOH + X2+2Y- ► (C17H35COO-)2X2+ + 2H+2Y-
(Y = OH- , ½O2- etc.)
(3) Fusion Process :
Stearic Acid is directly heated with desired product's metal salt
(Oxide or Hydroxide) beyond the melting point of desired stearate
under continuous agitation to give desired stearate without any
byproduct. Resultant is high quality product with fewer impurities.
Reaction is similar to direct process.