A. Venema et al., SUPERCRITICAL-FLUID EXTRACTION OF NYLON-6 - AN INVESTIGATION INTO THEFACTORS AFFECTING THE EFFICIENCY OF EXTRACTION OF CAPROLACTAM AND ITSOLIGOMERS, HRC. Journal of high resolution chromatography, 16(9), 1993, pp. 522-524
Caprolactam and oligomers can be efficiently extracted from nylon 6 by
use of supercritical fluid extraction with carbon dioxide containing
7.5 % (m/m) methanol as the extraction fluid. The application of a sta
tic extraction, using an additional amount of methanol, is necessary t
o obtain high extraction efficiencies.