370959

Lignin, alkali

• Synonym(s): Lignin, kraft
• CAS Number: 8068-05-1
• MDL number: MFCD09039274
• UNSPSC Code: 12162002
• NACRES: NA.23

Properties

• description: surface tension 43 mN/m (1% aqueous)
• form: powder
• impurities: 5% moisture
• loss: 13.4 wt. % loss on heating, @ 316°C; 3.3 wt. % loss on heating, @ 149°C; 5.7 wt. % loss on heating, @ 204°C; 8.5 wt. % loss on heating, @ 260°C
• pH: 6.5 (25 °C, 5%, aqueous solution)
• transition temp: sintering point 188 °C
• solubility: NaOH: 0.05% (warm 5% aquesous); MEK: partially soluble; benzene: insoluble; dioxane: soluble; ethylene glycol: soluble; hexane: insoluble; methanol: partially soluble
• density: 1.3 g/mL at 25 °C
• bulk density: 23 lb/cu.ft (loose); 32 lb/cu.ft (packed)

Description

General description

Lignin, alkali is a complex, three dimensional polymer that is also known as kraft lignin that has undergone hydrolytic degradation. It is one of the major components of lignocellulosic materials. Lignin is a major product for second generation bioethanol production and is an impurity in the separation of cellulose from wood.

Application

Lignin, alkali can be used as a surface treatment agent for composites of natural fibers with petroleum based resins. It can be used as a biosorbent for potential applications in removing toxic metal ions from wastewater.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves