Tannin - The spray drying process offers a gentle way to preserve the
activity of these materials.
Tannins are water-soluble products applied for curing of fresh leather. The
spray drying process offers a gentle way to preserve the activity of these
materials. The spray died powder can readily be re-dispersed in water for use
in the tanning process.
Tanning materials can be divided into two groups:
- Natural tannins which are extracted from woods, barks and fruits (
Quebracho, Wattle, Divi-Divi, etc.)
- Synthetic tannins, such as chemical chrome tanning material ( basic
chromium salts )
The corrosive and abrasive nature of some of these tannins requires our
experience in applying special materials and designs to product-contact parts
and feed/product handling systems to ensure a plant's durability and
We have supplied many co-current-flow spray dryers
with a high-speed rotating atomizer wheel and nozzle towers in combination with
powder conveying and agglomeration systems to the tannin industry worldwide.