In the manufacture of liquid dyes, almost complete desalting, which helps to improve the stability of the product, enhances the solubility of the dye. Diafiltration is used to allow a high level of desalting to be achieved. The process of desalination of aqueous dye-salt solutions by polymeric nanofiltration membranes using commercially available modules was studied. The influence of dye and salt concentration on the salt rejection and pressure applied on the flux as well as comparison of individual NF membranes for desalting purposes is presented. The great interest is also devoted to the mathematical modelling of nanofiltration and description of discontinuous diafiltration by periodically adding solvent at constant pressure difference.
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Research Article| April 01 2010
Nanofiltration in the manufacture of liquid dyes production
Water Sci Technol (2010) 61 (7): 1865–1873.
P. Mikulášek, J. Cuhorka; Nanofiltration in the manufacture of liquid dyes production. Water Sci Technol 1 April 2010; 61 (7): 1865–1873. doi: https://doi.org/10.2166/wst.2010.871
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