| 摘要 |
<p>PROBLEM TO BE SOLVED: To purify a monomer by bringing a monomer solution containing sulfur compounds into contact with an aqueous solution of an alkali(ne earth) metal hypochlorite, then extracting the monomer thereby obtaining the monomer of high quality having no foreign smell. SOLUTION: A plastic waste that contains sulfur compounds and a resin containing more than 50wt.% of methyl methacrylate units or styrene units is thermally decomposed to prepare a monomer solution. This monomer solution is treated with an aqueous solution of an alkali(ne earth) metal hypochlorite and extracted or distilled thereby purifying the monomer.</p> |
