Category Archive : Technical Support

Calcium lignosulfonate

Lignosulphonate used in Asphalt industry

•Crack filling composition involving quaternary ammonium

salt, aliphatic amine,ammonium lignosulphonate , imidazoline, and amide.

• Water stability of an asphalt mixture can be improved by

adding 0.3% lignosulphonate fibers.

• Asphalt‐emulsifying agent containing SW sodium lignosulphonate  with

an av. mol. wt. of 200‐100,000 (sodium  lignosulfonate ,and the lignosulphonate is that broad‐leaf pine or needle‐leaf pine) has the proper HLB value, slow

demulsification speed, proper frothing ability, and strong foam stability.

• Ammonium Lignosulphonate  additive has been shown to provide a warm mix additive

that can modify the combination state of asphalt and stone material surface;

modifying the fluidity; and decrease production cost of the asphalt mixtures.

Lignosulfonate works as dispersant

Lignosulphonate use as dispersant

Dye dispersant is prepared from sulfate/sulfite pulping liquors,crosslinked with sulfite/formaldehyde, products exhibits good dispersion, property, heat-resistant stability, high temp. dispersion property, fiber staining property and azo dye reducing property.

Chemically modified lignosulphonate has been used as a dispersing agents,complexing agent, flocculent, thickener or auxiliary agents for coatings, paints or adhesives.Oil Well Drilling Muds,Coal-water slurry dispersant.

A lignosulphoante-derived material has been reported to be a good as a dispersant for soils and applications shown for cleaning and/or laundry detergent compounds.

A mixture including polycarboxylic acid, and lignosulphonate has been used for cleaning aluminum plates to prevent calcium scaling.

Lignosulphonate have been used as biodegradable and nontoxic emulsifiers or dispersants for emulsion or dispersion polymerization.

Jet printing ink was prepared including sulfonated lignin.

Lignosulphonate  use in agriculture.

•Slow-release urea is composed of 90‐99%

urea 1‐10 lignin wt.%.

Lignosulphonate is used either directly or chemically modified, as a

binder, dispersant agent for pesticides/herbicides,

emulsifier, and as a heavy metal sequestrate.

Lignosulphonate nutrient medium has been applied as an additive for

restoring vegetation on road slope and bare mountain.

• Oxidized and pulverized lignosulphoante when blended with other

chemicals has be used as a soil water retention agent in

acidic dry land or desert soil, or as a binder for fertilizer.

Lignosulfonate used in leather tanning

The lignosulfonates are long explored waste or by-products of the pulp and paper making industry.  Similar in many ways to tannins, many have studied and researched ways to use them in tanning.  In the past they have been found only minimally useful as fillers, coloring (poor) agents, etc., but never as tanning agents.  However, one must now stop and consider the changes in tanning information and look at the phenolic character as well as the molecular size of these compounds which may under just the right conditions lend them to a new combination tannage that really could be useful.

Since they are natural materials that would be bio-degradable.  They have large molecular weights on the order of tannin compounds.  They have active phenolic character, though much less than most tannins.  They produce a brown color similar to tannins and have many common chemical and physical characteristic like tannins.  They are available in huge quantities at very reasonable prices.  On the other hand, many of the best minds in the industry have tried for decades to use them. use 2%-3% Lignosulfonate during pretanning process(before adding Chrome or vegetable tannin)is to increase the tan’s penetration time and uptake into hide and shortens the tanning time.

Calcium lignosulfonate

Calcium lignosulfonate

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.

sodium lignosulfonate

Sodium lignosulphonate used as dispersing Agent

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.

Method of Use:

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.