Leather Tanning Chemicals Valanea Tanning Extract Tannin In Plants

Quality indicators

The production process of tannin extract generally includes the following steps:

Raw material collection:

Select bark rich in tannin, such as oak bark.

Washing and crushing:

Wash the bark, remove impurities, and then crush it.

Extraction:

Put the crushed bark into the extraction equipment and use hot water or steam for extraction, usually at high temperature, to extract tannin substances.

Filtration and concentration:

The extract is filtered to remove solid impurities and then concentrated, usually by evaporation to reduce the water content.

Drying and powdering:

The concentrate is dried, usually by spray drying or drum drying, and finally made into a powdered product.

Uses of tannin extract:

Used in leather tanning, dye fixative, wood preservation, metal preservation, mineral processing, etc.