AS the first generation concrete admixture, Calcium lignosulfonate is one of the lignin derivatives obtained in the pulp industry. Calcium lignosulfonate (referred to as wood calcium) is a multi-component polymer anionic surfactant. Its appearance is light yellow to dark brown powder with a slight aromatic odor. The molecular weight is generally between 800 and 10,000. Strong dispersibility, adhesion, and chelating properties. It is usually made from the cooking waste liquid of acid pulping (or called sulfite pulping) by spray drying. It is soluble in water but insoluble in any common organic solvents. The PH value of its 1% aqueous solution is about 4-6.
Industrial lignin has the characteristics of polymer and some special properties. It is mainly used in water treatment agents, concrete admixtures, dye dispersants, and various complexing agents, adhesives, etc., but the scope of application is still relatively limited. Although calcium lignosulphonate is a waste material produced in the papermaking process, it still has the basic structure of lignin-benzyl propane derivative, and its sulfonic acid group makes it soluble in water.
Calcium lignin sulfonate has strong decomposability, cohesiveness, and affinity, and has been widely used as pesticide filler, emulsifying and dispersing agent, water suspension and suspoemulsion agent, concrete water reducing agent, cement water-reducing agent, and auxiliary molding agent, printing and dyeing auxiliary, compound fertilizer, resin, leather tanning agent, mineral powder binder, ceramic auxiliary, refractory plasticizer, and bonding agent, casting, oil well or dam grouting gel, mineral processing dispersant, Feed additives, coal water slurry dispersants and additives, carbon black granulators, asphalt emulsified chemical pesticides and other chemical deep processing fields.
|Index items||Standard value||Test Results|
|Appearance||Brown powder||Meets the requirement|
|Total reducing matter||≤6.0%||4.7|
|Calcium magnesium general quantity||≤1.0%||0.78|
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