| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for recovering high purity monomer which produces an acrylic resin product with extremely reduced impurity and high transparency, without decomposition of the monomer gas produced by pyrolysis in a recovery process recovering the monomer from an acrylic resin waste or the like mainly comprising methyl methacrylate monomer in dry distillation using a heating vessel with an agitator. SOLUTION: The method comprises thermally decomposing the acrylic resin into a gas state by dry distillation in the heating vessel with the agitator, liquefying the gas state pyrolysis product, and then purifying the liquefied pyrolysis product by distillation to recover the monomer, where the tip speed of the agitator is set at 0.1 to 35 m/min. COPYRIGHT: (C)2004,JPO |
