marine-type impeller is added to provide some axial-flow pumping along with the ra-dial-flow high-shear mixing. This impeller may be located at a level that can cause splashing if only a portion of the batch is mixed, e.g., during the addition of one emul-sion phase to another. A wide variety of mixing-head configurations are available. Some have vertical teeth, a stator with round holes, a stator with vertical slots, or a finer screen stator, which type is often specified for emulsions, as shown in Fig. 18. ! . if

doi:10.1201/9781420000955-44

Chapter

marine-type impeller is added to provide some axial-flow pumping along with the ra-dial-flow high-shear mixing. This impeller may be located at a level that can cause splashing if only a portion of the batch is mixed, e.g., during the addition of one emul-sion phase to another. A wide variety of mixing-head configurations are available. Some have vertical teeth, a stator with round holes, a stator with vertical slots, or a finer screen stator, which type is often specified for emulsions, as shown in Fig. 18. ! . if

Chapter

marine-type impeller is added to provide some axial-flow pumping along with the ra-dial-flow high-shear mixing. This impeller may be located at a level that can cause splashing if only a portion of the batch is mixed, e.g., during the addition of one emul-sion phase to another. A wide variety of mixing-head configurations are available. Some have vertical teeth, a stator with round holes, a stator with vertical slots, or a finer screen stator, which type is often specified for emulsions, as shown in Fig. 18. ! . if

ABSTRACT

Since the particle or droplet sizes of dispersed delivery systems are always several orders of magnitude smaller than the stator gaps of whatever geometry, the effectiveness of one type over another has not yet been documented. The formulator or the scale-up engineer may find it beneficial to test various configurations.