Sodium lignosulphonate is made from corncob by utilizing sulfite pulping. Corncob is the single raw material during production, it is processed by adding 12% Na2SO3 into continuous digester, solution being condensed by a mechanical steam compressor and separated by chromatography, after second-phase condensation, obtain aqueous solution SLS WS-1 with high sugar (sugar content≥10%), and then after desugarization obtain SLS WS-2 with low sugar (sugar content ≤8%).
This product does not contain any methanal, APEO, quinoline and other harmful substances, it's excellent thermal stability, dispersing property and good cohesiveness make it widely used as bulking agent and grinding aid in textile industry. it also can be used in carbon black, pesticide, animal feed, refractory, ceramics and pigment etc. Both models have powder and liquid forms.
|Items||Liquid form||Powder form|
|External appearance||Dark brown||Light brown|
|Dry matter||48% min.||93% min.|
|PH (13% aqueous solution)||4-7||4-7|
|Gravity (45% solution)||1.230-1.265 g/ml||1.230-1.265 g/ml|
|Water insoluble||0.3% max.||0.5% max.|
|Ash||10% max.||20% max.|
|Sodium content||1.5% min.||1.5% min.|
|Reducing sugar||10% min.||10% min.|
|Residue (325 mesh seive)||10ppm max.||20ppm max.|
|C.I content||0.35% max.||0.5% max.|
The above analyses are for sodium lignosulphonate solution, and are not formal specification, values may change subject to specific needs of customers.