The reaction of stearic acid with metal oxides, metal hydroxide or carbon salts is a gradual increase in the reaction temperature in a large amount of water. So there is no byproduct of the Reaction. The direct reaction method of the stearic acid metal salt is also a high purity of fine powder, they are insoluble in water metal salts This is particularly important for the direct reaction process. Not all stearic acid salts can be prepared by this method, since the reactivity of the reactants may not be sufficient at First.
One advantage of this method is that the reaction is carried out under a certain pressure and at a higher temperature (>100°c), which makes it possible to make other types of stearic acid metal salts, which are usually not obtained by direct reaction process under normal conditions.