Patent ID: 7972623

Claim:
A method for the production of effervescent granules, in which at least one acidic effervescent component and at least one CO 2 -eliminating alkaline effervescent component are loaded as reactive constituents into an evacuatable container and react with one another in a vacuum with stirring, the container being evacuated to a first vacuum value after loading with the reactive constituents, whereupon—after reaction-related evolution of gas and pressure increase up to a second vacuum value—effervescent granules are formed, and wherein the reaction is carried out in a vacuum range of from 200 to 900 mbar; and wherein evacuation of the container to a first vacuum value within said vacuum range and reaction-related gas evolution and pressure increase to a second vacuum value within said vacuum range is repeated cyclically by repeated, controlled opening and closing of a valve to a vacuum pump; and wherein said reaction takes place without intermediate drying; and whereupon after a number of cycles the reaction is stopped by drying the resulting effervescent granules in a vacuum.