Using conventional agitators a number of problems can be encountered:• Hydration of thickening and suspending agents is one of the most difficult of all mixingoperations. Agglomerates can easily form and some ingredients require shear inorder to develop their desired properties.• When adding powdered ingredients to the vessel, partially hydrated materials canbuild up on the vessel wall and parts of the agitator.• Agitators cannot easily form stable emulsions even when the oil and water phaseshave been heated.• Long process times and additional equipment are often required to achieve ahomogeneous product.
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