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Send EmailLignosulfonic Acid, Calcium Salt, Calcium Lignosulfonate, Lignine Sulfonate Calcium, 8061-52-7
CAS: 8061-52-7
Molecular Formula: C20H24CaO10S2
Names and Identifiers
| Name | lignosulfonic acid, calcium salt |
| Synonyms | Calcium Lignosulfonate Ligninesulfonate Calcium Lignosulfonic acid calcium salt lignosulfonic acid, calcium salt calcium 3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate |
| CAS | 8061-52-7 |
| EINECS | 617-125-7 |
| InChI | InChI=1/C20H26O10S2.Ca/c1-28-18-7-3-6-15(20(18)21)12-16(13-32(25,26)27)30-17-9-8-14(11-19(17)29-2)5-4-10-31(22,23)24;/h3,6-9,11,16,21H,4-5,10,12-13H2,1-2H3,(H,22,23,24)(H,25,26,27);/q;+2/p-2 |
Physico-chemical Properties
| Molecular Formula | C20H24CaO10S2 |
| Molar Mass | 528.61 |
| Density | 0.5 g/cm3 |
| Solubility | H2O: soluble |
| PH | ~4 (3wt. %) |
| Storage Condition | Room Temprature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| MDL | MFCD00163202 |
| Physical and Chemical Properties | Calcium lignosulfonate is Brown yellow powder, with good water solubility, loose capacity of about 0.35g/cm3, belongs to the anionic surface active substance, non-toxic, has a pungent odor. Calcium lignosulfonate powder was prepared from waste liquor of sulfite wood pulp as raw material, after neutralization with milk of lime, removal of sugar by biological fermentation, concentration to solid content up to 50% by evaporation, and spray drying. |
| Use | Lignin is the second most abundant natural polymer with aromatic structure in nature, and is an extremely important renewable biological resource. The depletion of traditional ore resources and the enhancement of human awareness of environmental protection have brought strong impetus to the basic research and industrial utilization of lignin. Calcium lignosulfonate is a derivative of lignin, and its modification to prepare surfactant has made a series of important progress in recent years. Modified products are widely used in industrial and agricultural production. |
Risk and Safety
| WGK Germany | 1 |
| HS Code | 3913908000 |
Upstream Downstream Industry
Introduction
It is a multi-component polymer anionic surfactant with a slight aromatic smell, and its molecular weight is generally between 800 and 10000. It has strong dispersibility, cohesiveness and chelation. The products have been widely used as cement water reducing agent, pesticide suspending agent, ceramic body reinforcing agent, coal water slurry dispersant, leather tanning agent, refractory binder, carbon black granulation agent, etc.
Preparation
lignin is insoluble in neutral liquids and organic solvents. In order to produce lignin, there are two most commonly used methods to separate cellulose, hemicellulose and lignin; Calcium lignosulfonate is then produced from pulp waste (containing lignin).
1. Sulphite pulp process this is the treatment of wood chips with a well-known hot acid solution of Calcium sulphite in the acid form, during which part of the lignin is sulfonated and the hydrolysis of the bond also occurs. Hydrolysis allows the lignosulfonate molecules to be dissolved in the slurry, which is accompanied by other soluble (e. G., carbohydrate) products whose solubility is substantially fixed.
2. Kraft pulp (I. E. Sulfate) method
Another method is to treat wood chips with a hot strong alkali solution, the pH is controlled in the range of 13 to 14, and the lignin in the mother liquor is completely dissolved, the hemicellulose was only partially dissolved. The dissolved product can be modified to obtain products with different properties and various specifications, so that it has a broad application prospect.
production method
with sodium sulfite pulp waste liquid as raw material, the lime water sedimentation, acid dissolution, filtration and impurity removal, filtrate concentration and obtained. For details, please refer to process 1 of MY for water reducing agent.
Anionic Surfactant
calcium lignosulfonate is a multi-component polymer anionic surfactant, referred to as Wood calcium, and sodium lignosulfonate water reducing agent is a surfactant, linear polymer compounds, the appearance of brown powder, slightly aromatic odor, the average relative molecular mass of about 20000, with sulfurous acid pulp waste by advanced production technology to acidification, sulfonation, modification and other processes refined anionic surfactant made, phenylpropane derivatives as structural units connected by C- O bond and C- C chain, with supramolecular characteristics and high specific surface area, containing a large number of functional groups, such as phenolic hydroxyl, Methoxy, benzyl hydroxyl, carbonyl, carboxyl, vinyl, etc.
Calcium lignosulfonate has strong decomposition, cohesiveness, crab compatibility, has been widely used as pesticide filler, emulsion dispersant, water suspension and suspension emulsion, concrete water reducer, cement water reducing agent and molding aid, printing and dyeing auxiliary, compound fertilizer, resin, leather tanning agent, mineral powder Binder, ceramic auxiliary, refractory plasticizer and binder, casting, oil well or dam grouting gel, mineral processing dispersant, feed Additives, coal water slurry dispersants and additives, carbon black granulating agent, asphalt emulsified chemical pesticide and other chemical deep processing fields, etc.
Concrete water reducer
calcium lignosulfonate can be used as water-reducing agent for concrete, which has adsorption and dispersion effect on cement and can improve various physical properties of concrete.
After addition to the concrete, the hydrophobic group is adsorbed on the surface of the cement particles, so that the cement is negatively charged. The cement particles with the same charge are mutually repulsive and dispersed under the action of charge repulsion, the flocculent structure formed by the cement at the initial stage of adding water becomes a dispersed structure, and the free water in the flocculent coagulation body is released, so as to achieve the purpose of water reducing agent. The main characteristics are as follows:
1, the amount of cement dosage of 0.20-0.30%, the commonly used dosage of 0.25%, reduce water consumption up to 8-12%.
2, without changing the amount of concrete water, can increase the mobility of concrete, improve workability, improve the quality of the project.
3, in the maintenance of Concrete slump, strength and the same as the reference concrete, can save 8-10% of cement.
4, with Micro Air entraining, can improve the anti-permeability of concrete freeze-thaw performance.
5. This agent is non-corrosive to reinforcement and aggregate after being mixed into concrete.
Calcium lignosulfonate water reducing agent is suitable for large volume concrete, large fluidity concrete, pumping concrete, commercial concrete and summer concrete construction and concrete with special requirements for retarding, cast-in-place concrete, pile concrete, manual excavation of concrete and underground mass concrete construction, generally with the use of high efficiency water reducing agent.
