New Hosokawa Vrieco-Nauta Active Freeze Dryer

New Vrieco-Nauta Active Freeze Dryer

A unique technology in the field of freeze drying (lyophilisation)

A quicker and less labor intensive freeze drying process and the possibility of producing loose and free-flowing powder at low temperatures and low pressures, all in one vessel.

More Info About the Vrieco-Nauta Active Freezer Dryer

Drying technology is a major activity within the powder-processing division of the Hosokawa group. Hosokawa has long enjoyed an outstanding reputation based on the Vrieco-Nauta conical batch vacuumdryers, which have set a new market standard for drying technology. The vast, specialized know-how built up by the group has led to the development of a new type of dryer, the Active Freeze Dryer^TM (patent pending).

Why Active freeze drying
Until now most of the freeze dryers are of the Tray Dryer type. Despite the optimal structure of the individual product particles the product layer on the plates will usually form one piece of hard baked material. Often the product has to be crushed after freeze drying, which may lead to damage of the product structure. Another disadvantage is the relatively low heat transfer rate due to the dead state of the material on the plates. Also the handling of the product is quite labour intensive because the trays have to be filled and discharged manually.

The Advantages
The Hosokawa Active Freeze Dryer™ enables to produce at low temperature and low pressure a lump-free, free-flowing, freeze dried product (see picture). The Active Freeze Dryer™ also has a better heat transfer rate due to the continuous mixing of the product, resulting in shortening the drying process. Furthermore the freezing step is simplified because it can be done in the same vessel instead of having a separate freezing unit, which results in easy handling of the product compared to the tray dryer equipment. The Active Freeze Dryer™ can also be used in continuous operation. Since the dried product is released from the frozen material during the drying process, these dry particles can be collected separate from the actual dryer.

Typical applications
Typical applications of this lyophilisation technology are e.g.:

• temperature sensitive materials
• delicate structured materials
• pro-biotics (bacteria as food additives)
• pharmaceuticals
• blood serum
• ultra-fine (nano) materials

Test equipment at your disposal
In the test-facility of Hosokawa in Doetinchem - Netherlands a 5 litres and a 60 litres Freeze Dryer are available for testing.

We have experience in freeze drying of bacteria, enzymes, pharmaceuticals, probiotics, polymers, salts, ceramics, lime stone, bakery yeast, yeast, broth extracts, molds, herbal extracts, glass powder, vegetables, lipides, insects, acrylic solution, api’s, milk, milk derivatives, nano materials, catalysts, seed based soup, gelling agents, flavours, cellulose fibres, proteins, etc.

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