Common household products like salad dressings, dairy products, pharmaceutical and cosmetic creams/lotions, and more, is possible because of emulsions. Because these opposing liquids wouldn’t naturally interact, emulsion production requires powerful mixing to achieve a stable product. Most industries solve this dilemma by homogenizing their elements.

In emulsifying, a temporary mixture of two liquids (commonly oil and water) which are actually immiscible is formed.

In order to produce mixtures like this, a high energy input and special technology are required.  High shear forces overcome the surface tension of the liquids being mixed. In this process, the discontinuous phase must be divided into droplets that are as fine as possible.

Rotor-stator systems are ideal for emulsifying as the system creates extremely fine droplets combined with strong turbulence that effectively binds the molecules to the reduced surface area.

Homogenization has a number of advantages, regardless of the product being synthesized. For example, other machines like inline mixers use only a single mechanical force, while the multiple forces of a homogenizer allow for smaller particle sizes and more stable mixtures.

Homogenization offers three primary benefits specific to emulsions:

1) The production of stable emulsions. Therefore the two phases won’t separate after sitting for long periods of time, and this is accomplished by the intensive pressure imparted on the product during the homogenization process.

2) The ability to decrease particle size. Pressure along with multiple mechanical forces work to decrease particle size more than most other available mixing equipment. This results in higher surface area availability of the dispersed phase and enhanced bioavailability.

3) Overcomes resistance of two immiscible liquids. Water and oil, in a mixing machine, impart resistance because of their opposing attractions. The high shear offered by homogenization helps to overcome this resistance to produce a high quality emulsion.

Probst & Class colloid mills and vibroreactors are ideal for emulsifying as rotor and stator are manufactured with extreme precision allowing a very fine setting of the milling gap. This means that the energy input is effectively transformed into mixing energy, producing stable emulsions. These machines have a long service life and are easy to maintain. Their low TCO can play a key role in improving the productivity of your production plant.

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