Calcium lignosulfonate (Calcium lignosulphonate) is a multi-component polymer anionic surfactant, the appearance of a pale yellow to dark brown powder, slightly fragrant odor, a molecular weight generally between 800 and 10,000, with a very strong dispersion, adhesion, chelate. Usually spent cooking liquor from the pulping acid (or sulfite pulping), and spray drying. May contain up to 30% reducing sugars. Soluble in water but insoluble in any ordinary organic solvents. 1% aqueous solution having a pH value of about 3 to 11.
Main application:
1. Used as concrete admixture water reducer.
2. Used as binder in smelting industry.
3. Used as dispersant and binder in refractory areas.
4. Used in ceramic areas.
5. Used as adhesive in feed areas.
6. Used also in pesticide, fertilizer areas.
Application in fertilizer industry:
Recycling of waste paper pulp lignin has many active groups, can slow degradation in the soil, slow-release fertilizer suitable configuration.
Numerous studies show that the main reason for the low utilization rate of fertilizer adverse physical and chemical properties when chemical fertilizers. Common chemical fertilizers dissolve quickly, in case of thermal decomposition in the soil caused by soil component fixation losses due to surface runoff, erosion, underground infiltration, causing harm to the ecological environment pollution.
The rich source of calcium lignosulfonate, slow degradation in soil, no poison, no residue, can improve the overall fertility of the soil is conducive to fertilizer to increase production, reduce production costs.
Calcium lignosulfonate may be used for preparing slow-release fertilizer, which has slowly dissolved nitrogen, non-volatile, slow release, difficult leaching efficiency advantages. Calcium lignosulfonate on urease activity and nitrification and denitrification has a certain extent, can reduce volatilization of ammonia. Add 1.01% of calcium lignosulfonate in urea, and 19.4% of the sulfur wrapped into slow-release urea.