Category Archive : Technical Support

Calcium lignosulfonate

Calcium Lignosulfonate Chemical characterization

1. Composition

Lignin is the second largest component of wood. It is a highly polymerized material that makes up the middle lamella of woody fibers and holds the fibers together.

The basic units of the polymeric structure consist of three aromatic propenyl alcohols (monolignols): coniferyl alcohol (4-(3-hydroxy-1-propenyl)- 2-methoxyphenol), p-coumaryl alcohol (4-[(E)-3-hydroxyprop-1-enyl]phenol), and sinapyl alcohol (4- hydroxy-3,5-dimethoxycinnamyl alcohol), of which coniferyl alcohol represents the principle unit in lignin.

Methoxy groups are abundant on the polymeric structure providing many reactive sites and promoting its low water solubility. In calcium lignosulfonate (40-65), however, sulfonate groups are attached to the alkane
backbone units to confer water solubility and calcium anions, introduced with the calcium sulfite during the process of manufacture, stabilize them.

The degree of sulfonation on the alkane backbone has also been
established as a criterion for the identification of the additive. An upper limit of 5.0 % for calcium content was also set.

Ultraviolet spectroscopy confirms the presence of phenyl groups in the additive and infrared spectroscopy reveals bands characteristic of sulfonate at 1210-1220 cm-1, 1037 cm-1, and 655 cm-1.

A proposed structure of the polymeric fraction of calcium lignosulfonate (40-65) is presented in Figure 5.1. Representative IR and UV spectra are presented in Figures 5.2 and 5.3, respectively.

2 Impurities (including degradation products)

Impurities in calcium lignosulfonate (40-65) include monosaccharides from wood cellulose, sulfite residues and potentially arsenic and various metallic elements. Filtration, evaporation and ultrafiltration aim at reducing the content in the final product to not more than 5 % reducing sugars and not more than 0.5 % sulfite, on the dried basis, which are the bases for the establishment of corresponding limits in the specifications monograph.

A typical analysis provided by the sponsor of a single sample of the additive
showed the presence of the following reducing sugars: mannose (2.2 %), xylose (1.1 %), galactose (0.6 %),glucose (0.4 %), arabinose (0.3 %), and rhamnose (0.1%). The specifications monograph also contains maximum limits on Loss on drying (8.0 %), Total ash (14.0%), arsenic (1 mg/kg), and lead (2 mg/kg).


Potassium lignosulfonate

Sodium Lignosulphonate Used as Reinforcing Agent

Sodium Lignosulphonate ( Ceramic Body Reinforcing Agent) is one kind of modified nature lignin product. In the field of reinforcing agent for ceramic paste, the sodium lignosulphonate series products can be adopted as the main compound materials. These Sodium Lignosulphonate (HMP Ceramic Body Reinforcing Agent) attribution value is superior to other equivalent material and the economic efficiency is notable.

In the field of reinforcing agent for ceramic paste,it can enhance the strength of ceramic paste and improve the capability of molding. There will be water reducing and shortening the period for drying when mixing in the ceramic paste. It is the superior substitute goods for Carboxymethyl Cellulose .

Application of sodium lignosulphonate

Application of sodium lignosulphonate

Concrete industry:

At the concrete manufacture and dry construction,it reduces the conception of components  up to10-15% remixing of the concrete mass reduces and its solidity rises,the speed of hardeing slow down.Usage of lignosulphonate reduces humidity of raw mud if conserving its flow behaviour,which rises the manufacture of stove and reduces specific flow volume to the buring of clinker,with the usage of intensifier on the base of lignosulphonate the production of grinding units rises and there is an opportunity to change expansive and defict chemical products.

Petroleum industry:

In this area, sodium lignosulphonate is used as a flotation agent and reagent for regulating of the basic parametres of mud flushes.They are also acomponents of gel forming systerms.Gel forming leads to redistribution of fitration flows and their better regulation.Technical lignosulphonate are used for hardening of different construction types:drill well moon pool,holes,and in mine rals industry.

Building materials production:

Sodium lignosulphonate can be used in producing plates because of its astringent,sticking and surface active propertities.Because this kind of production is very expensive ,toxic,carbamide are used,mixture of  modified lignosulphonate with loam can get combined binder.Meanwhile the toxi cation of the plates can be reduced up to 50%.And in the producing of mineral-cotton plates,the products can become more firm and water-proof.

Drilling industry:

Sodium lignosulphonate can be used as a flotation reagent in minerals industry to achieve incomplete washing of separating materials. They are used for drilling well moon pool hardening and be added in different ground based in different ground bases and carpets. Sodium lignosulphonate can emulsify bituminous materials,liquid bituminous materials or coal tars,thus constructions are strengthened.

sodium 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.

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.