Drying of Tannins

This page lists tannins which have been dried*/ agglomerated/ granulated on GEA Niro spray dryer, fluid bed dryers, airstream drying systems, flash dryers, freeze dryers, spray drier absorbers, agglomerators and granulators.

Note: GEA Niro supplies the technology of spray drying, fluid bed drying, flash drying and freeze drying for drying the products listed below. We do not however supply these products.

Drying of Tannins on GEA Niro Plants

• Chestnut extract
• Chrome tannin
• Chromium sulphate
• Divi-divi extract
• Mimosa extract
• Myrobalan extract
• Quebracho extract
• Synthetic tannin
• Wattle extract

* (term 'drying' incorporates various drying procedures like freeze drying, spray drying, fluid bed drying, drying through vortex disintegrator driers, flash drying, spray drying absorber, drying through agglomerator and granulator )

Tannins is a group of simple and complex phenol, polyphenol, and flavonoid compounds, bound with starches, and often so amorphous that they are classified as tannins simply because at some point in degradation they are astringent and contain variations on gallic acid. Tannins are produced by plants and are typically found in the leaves, fruits, stems, and barks of specific plants, including certain teas. Long-term exposure to tannins may be carcinogenic. Compounds found in milk decrease the carcinogenic properties. Tannins are generally protective substances found in the outer and inner tissues. All of the tannins are relatively resistant to digestion or fermentation, and either decrease the ability of animals to easily consume the living plant, or, as in deciduous trees, cause shed parts of the plant to decay so slowly that there is little likelihood of infection to the living tree from rotting dead material around its base. All tannins act as astringents, shrinking tissues and contracting structural proteins in the skin and mucosa.