Optical Brightener & Dye Desalting

Membrane technology is becoming widely accepted in the dyestuffs industry, in particular for Reactive, Acid and Direct dyes , Food Colours & in Optical Brightener-OBA, as a way of producing high quality products, maximising yields and capacity, and saving raw materials and energy.

Membrane technology is becoming widely accepted in the dyestuffs industry, in particular for reactive, acid and direct dyes, as a way of producing high quality products, maximising yields and capacity, and saving raw materials. Nanofiltration membranes are used for two purposes; desalting and concentration. Desalting is the process that removes salts in the manufacture of both powder and liquid dyestuffs. The dye, retained by the membrane, is desalted and concentrated, increasing its strength by reducing the salts and low molecular weight organics content.

Plant capacity can be increased using nanofiltration prior to drying in the production of powder dyes. In the manufacture of liquid dyes the solubility of the dye is enhanced by almost complete desalting which helps to improve the stability of the product. Please contact for replacement membranes as well as for new filtration system. Piloting facility available on demand.