| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of recycling a nylon 6 product from a nylon 6 product containing at least one resin constituent as an impurity by a simple operation and an industrially advantageous method, and further a method for recycling the nylon 6 product by depolymerizing the recovered nylon 6 product to obtain a high grade caprolactam. <P>SOLUTION: The method comprises recovering the nylon 6 product from which the impurities are separated and removed by heating in an ethanolamine cleaning liquid the nylon 6 product containing at least one impurity selected from the group consisting of resin constituents by resin processing, and attached resin constituents, and further the method comprises recovering caprolactam by depolymerizing the recovered nylon 6 product. In this case, even if the raw material, that is the nylon 6 product, is dyed, decolorization can be carried out at the same time. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
