Futher processing of technical CNSL in the distilation process at reduced pressure leads to removal of the polymeric material called Residol. The composition of the distilled CNSL contains approximately 78% of cardanol, 8% cardol, 2% polymeric material, less than < 1% 2-methyl cardanol, 2.3% heptadecyl homologue triene, 3.8% heptadecyl homologue diene and the remainder other homologous phenols.
