INTRODUCTION:
The Crude/Raw CNSL (English: Cashew Nut Shell Liquid) is obtained by cold pressing or solvent extraction from Cashew Nut Shells. It comprises about 70% Anacardic acid, 18% Cardol, Cardanol 5%, and the remainder is composed of other compounds from the group of phenols, and polar compounds.
Technical CNSL (TCNSL) is obtained by further processing of the crude CNSL in the heating process, leading to Decarboxylation Anacardic acid, thus yielding a Cardanol. Technical CNSL contains about 52% Cardanol, Cardol 10%, 30% Polymeric material and the Residue is composed of other chemical compounds.