Information about Tannins Materials

Tannins are water-soluble products applied for curing of fresh leather.

The spray drying process offers an easy way to preserve the activity of the tannins materials. The spray died powder can be re-dispersed in water for use in the tannin process. Tannin materials can be divided into two groups:

• Natural tannin: hese are extracted from woods, barks and fruits ( Quebracho, Wattle, Divi-Divi, etc.)
• Synthetic tannin: These include chemical chrome tannin material ( basic chromium salts )

The corrosive and abrasive nature of some of these tannins requires our experience to apply special materials and designs to product-contact parts and feed/product handling systems. This ensures the plant's durability and trouble-free operation.
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.