Patent ID: 7322565

Claim:
A stirring device comprising a gassing stirrer having at least one exit opening and a liquid mixer or two liquid mixers having at least one exit opening, arranged on a shaft having a feed, wherein the at least one exit opening of the stirrer and the at least one opening of the mixer or of the mixers are at a distance from one another, such that a ratio, a/d, of distance, a, between the exit openings to diameter, d, of the stirrer and mixer or the mixers is from about 0.02 to about 0.5 and a ratio, b/d, of distance, b, between an edge of the stirrer and an edge of the mixer to diameter, d, of the stirrer or the mixer is from about 0.01 to about 0.4 and wherein the height of the liquid mixer is about 2 to about 25% of the height of the gassing stirrer.