LIGNOSULFONIC ACID, CALCIUM SALT

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 mineral resources and the enhancement of human environmental awareness have brought strong impetus to the basic research and industrial utilization of lignin.

CAS No.:
8061-52-7
Molecular Formula:
C20H24CaO10S2
Molecular Weight:
528.61
EINECS:
617-125-7

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DESCRIPTION

DESCRIPTION

LIGNOSULFONIC ACID, CALCIUM SALT

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SPECIFICATIONS

Item	Requirement
Appearance	Light yellow powder	Light brown powder
Lignosulphonate assay	50% Min.	50% Min.
Inorganic salts (Na,SO)	5% Max.	5% Max.
Reduced material	12% Max.	15-18%
Insoluble matter in water	1.0% Max.	1.0% Max.
Moisture content	5.0% Max.	5.0% Max.
PH	4-6	4-6

APPLICATION

Although calcium lignosulfonate is a waste generated in the papermaking process, it still possesses the basic structure of lignin - phenylmethylpropane derivatives, and its sulfonic acid groups make it soluble in water. Calcium lignosulfonate contains various chromophores, and its solid powder is yellow brown and prone to moisture and clumping; Calcium lignosulfonate molecules contain a large number of active groups, such as phenolic hydroxyl, carbonyl, sulfate, alcohol hydroxyl, etc. They can self condense or undergo condensation reactions with other substances.

The molecular weight and functional groups of calcium lignosulfonate are different, so it has different degrees of dispersibility and can adsorb on the surface of various solid particles. Industrial lignin itself has the characteristics of polymers and some special properties, mainly used as water treatment agents, concrete admixtures, dye dispersants, various complexing agents, adhesives, etc. However, its application scope is still relatively limited.