Sodium lignosulfonate used as dispersant,Sodium Lignosulfonate or sulfonated lignin is a water-soluble lignin extracted from the sulfite pulping process. Lignosulfonate is lypohydrophilic molecule due to the hydrophobic aromatic structure and the presence of the hydrophilic sulfonate groups on its structure. This unique structure of lignosulfonate makes it an effective dispersant or surfactant used in a wide range of industries, such as oil well dispersant, coal–water slurry dispersant, dye dispersion,
Sodium lignosulphonate dispersant selection guide
Sodium lignosulphonate used as a dispersant should be selected according to substrate, pH, particle size, solids loading, water hardness, required viscosity reduction, color sensitivity, and downstream processing conditions. It is commonly compared with sodium lignosulfonate, Dispersant NNO, and Dispersant MF when buyers need different dispersing strength or formulation behavior.
Application
What buyers should test
Pigments and mineral powders
Dispersion stability, slurry viscosity, settling, and color effect.
Concrete or construction mixes
Water reduction, setting behavior, strength development, and cement compatibility.
Agrochemical or fertilizer systems
Solubility, tank compatibility, particle suspension, and dosage range.
Before placing bulk orders, test the selected sodium lignosulphonate grade in the real formulation and confirm whether sodium, calcium, magnesium, NNO, or MF dispersant chemistry is the better fit.
ceramic colloidal processing, and polymer composites.
Sodium lignosulfonate Mainly used in disperse dye and vat dye dispersion and fill, Has good grinding effect, dispersion, good thermal stability, high temperature dispersion stability, contamination of the fibers is light, small reduction of azo dyes, without phosphorus, formaldehyde-free, no APEO, quinoline and biodegradable. can be used as acidic, reactive dye filling agent.
Sodium Lignosulfonate dispersant for coal water slurry
The effect of sodium lignosulfonate on the apparent viscosity of coal water slurry (CWS) was investigated. The adsorption behavior of the SL on the coal water interface has much greater effect on the viscosity of coal water slurry. The higher adsorption amount and compact adsorption film of SL on the coal surface help reduce the viscosity of CWS, and the zeta potential is also an important factor, which is influenced by the sulfonic and carboxyl group contents of the lignosulfonate molecule. Furthermore, the SL with its molecular weight ranging from 10,000 to 30,000 has both a higher adsorbed amount and zeta potential on the coal surface and the best effect on reducing the viscosity of the coal water slurry.
Application guidance
When making dispersant used, according to the processing of the original dye strength, determine the ratio of dye and dispersant, determine the dosage of dispersants, add half of the first sodium lignosulfonate dispersant with dye mill, reach the finish line, to join the other dispersant,this will be work well than all dispersant grinding at once.
Used as filling agent, dye can be added before the spray dry, also can be standardization in dye after spray dried. for different types of dyes, the same dye varieties of different manufacturers, it’s best to do experiments to determine the appropriate dosage of dispersants.
Storage and Packing
Multi-layer kraft paper bags, 25 kg/bag or tons of bag, ventilated, dry condition, save for 6 months to 2 years.
