Cashewnut Shell Liquid For Chemicals

Cashew Nut Shell Liquid is a versatile industrial raw material with diverse use in Friction Linings, Paints and Varnishes, Laminating and Epoxy Resins, Foundry Chemicals and as an Intermediary of chemicals.

Cashew Nut Shell Liquid conforms to IS 840 of Bureau of Indian Standards. The residue after extraction of Cashewnut Shell Liquid is Shell Cake, which is a very useful fuel and a substitute for firewood.  The innumerable industrial applications of CNSL are based on the fact that it lends itself to Polymerization by various means. Simple phenols from petrochemicals have restrictions and hence the ranges of products obtained from them are a few.

The following Polymerizations can be carried out with CNSL.

• Addition polymerization the side chain double bonds.

• Condensation polymerization at the ortho and para positions of the ring with phenolic various chemicals.

• Polymerization after chemical modification.

• Oxidative polymerization.

• Polymerization by physical means: heat, pressure, radiation, and electrical discharge.

• Various combinations of above methods.
  

Specifications

The Revised Specification of Bureau of Indian Standard, New Delhi, for untreated Cashewnut Shell Liquid (IS:840-1964)

• Specific gravity 300C/300C:0.950 to 0.970
• Viscosity at 30 0C, in centipoises:550
• Moisture, percent by weight: 1.0
• Matter insoluble in toluene, percent by weight: 1.0
• Loss in weight on heating, percent by weight: 2.0
• Ash, percent by weight:1.0

Polymerization
1) Time in minutes = 4
2) Viscosity at 30 0C, in centipoises = 30
3) Viscosity after acid washing at 30 0C, in centipoises = 200


Iodine value
1) Wij's method = 250
2) Catalytic method = 375

Colour shall be not deeper than dark brown when viewed by transmitted light.


Typical  Values
1) Specific Gravity at 300C=  0.9573
2) Viscosity at 300C in centipoise=  92
3) Moisture percent by weight= 0.5
4) Loss in weight, % wt= 1.89
5) Matter insoluble in toluene, percent by weight= 0.12
6) Ash % wt=  0.90
7) Iodine value, Wijs Method=  264
8) Acid Value as CaCO3 mg/L= 2960
9) pH= 7.8
10) Total Distillates ,% wt= 65.9