CNSL EXTRACTION FROM CASHEW SHELL

Purchased raw cashew nut shell is crushed by a screw type single chamber expeller at the rate of 900kgs/hr. No external heat is provided to the shell during expelling.

The expelled liquid is filtered using MS mesh at 2-3 stages. Subsequently the liquid is allowed to sediment for one day.

Next day sedimented liquid is pumped into a MS heating tank where it is heated by direct heating to 180 deg Celsius in 2 hours..Heating expels water,ammonia like substance and decarboxylates CNSL. A little amount of silicone based defoamer is added during heating to avoid frothing.

Heated CNSL is pumped to storage tanks and allowed to cool. Some amount of sedimentation takes place in storage tanks also

Specifications of CNSL

Properties

Results

Appearance

Dark Brown Liquid

Specific Gravity @ 30 Degree Celcius

0.960+ 0.01

Viscosity @ 30 Degree Celcius in CPS

550 Max

Viscosity.Sec by f4 CUP

40 to 200

ASH Content %

2 % Max

Moisture Percent

1%Max

Iodine Value ( Wiz’s method)

220-280

Loss in Weight%@ 205 Degree Celcius

1.5% Max

Plymerisation Time in Mins

4 Max

Activity

Application

Brake Lining

CNSL Formaldehyde  (NOVOLAC) resins are used for brake liner binding  preparation.

Surface  Coating

Above resin dissolved in  aromatic solvent provides weather proof heat and fire resistant dark colour  paint.

Cement

A rubbery gel formaldehyde  condensation product of CNSL is used in cementing of  floors.

Adhesive for wood  particle

Resole type CNSL  formaldedyhe resin is used as adhesive in the preparation of composite wood,  medium density particle board etc.

Foundry

Proven material in the  formation of foundry cores.

PACKING CASHEW NUT SHELL LIQUID (CNSL)

Cashew Nut Shell Liquid can be packed in any of the following :

  • MS drums – 200kgs net weight
  • IBC Tanks
  • Flexi tanks of ( 19KL/22KL/24KL)
  • Tanker trucks

 

 

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Cashew Shell Liquid.  
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