| 摘要 |
PROBLEM TO BE SOLVED: To establish a method for recovering raw material components such as monomers from nylon 6, 6 having high practicality and capable of increasing production amounts of raw material components by promoting hydrolysis of oligomers and capable of increasing recovery of the raw material components by preventing a secondary reaction such as heat decomposition of the raw material components. SOLUTION: This method for recovering raw material components of nylon 6, 6 by hydrolyzing nylon 6, 6 in high-temperature and high-pressure water comprises a step for carrying out hydrolysis reaction of nylon 6, 6 by feeding nylon 6, 6 to a hydrolysis reaction area and bringing the nylon 6, 6 into contact with high-temperature and high-pressure water, a step for successively transferring hydrolysis products produced in the hydrolysis reaction area to a hydrolysis product separating area and a step for separating the hydrolysis products into a deposit and a raw material component-containing aqueous solution in the hydrolysis product-separating area by making temperature and pressure conditions of the hydrolysis product-separating area lower in temperature and/or pressure than temperature and pressure conditions of the hydrolysis reaction area.
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