Process for even division of substances and mixtures of substances in the course of manufacture of pulverulent preparations by chemical reaction

A method for forming a uniform distribution of a substance in calcium hydroxide comprising:

• mechanically mixing a substance which is in the presence of water with calcium oxide which is a compound capable of reacting with water to form calcium hydroxide having a surface area greater than the surface area of said calcium oxide, said mechanical mixing homogenizing said calcium oxide, water and said substance such that said substance is homogeneously distributed within said calcium oxide prior to the observation of the temperature increase associated with the exothermic reaction between calcium oxide and water, and said mechanical mixing substantially homogeneously distributes said substance within said calcium oxide at a rate faster than the rate of reaction between water and calcium oxide;
• said mixing step being performed in the absence of compounds which delay the reaction between said calcium oxide and water to provide said calcium hydroxide;
• and upon reaction between said calcium oxide and water, a dust-dry substantially uniform distribution of said substance in calcium hydroxide is provided.