Journal
KOBUNSHI RONBUNSHU
Volume 70, Issue 12, Pages 731-737Publisher
SOC POLYMER SCIENCE JAPAN
DOI: 10.1295/koron.70.731
Keywords
Subcritical Water; Hydrolysis; Nylon6; epsilon-Caprolactam; epsilon-Aminocaproic Acid
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When nylon 6 is decomposed for 20 minutes at 350 degrees C, and 16.5 MPa of saturated vapor pressure in subcritical water, the decomposition ratio of nylon 6 was 99.1% and the yields of epsilon-caprolactam and epsilon-aminocaproic acid were 69.2% and 13.4%, respectively. In subcritical water, the reversible reaction between epsilon-caprolactam and epsilon-aminocaproic acid occurs and their equilibrium molar ratio was about 10:1 at 300 degrees C and with saturated vapor pressure. Furthermore, epsilon-aminocaproic acid decomposed to a byproduct. The calculated reaction time dependences of the yields of epsilon-caprolactam and epsilon-aminocaproic acid and the amount of the remaining nylon 6 for the whole hydrolysis route in subcritical water, agreed well with the experimental data. (C) 2013, The Society of Polymer Science, Japan
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