摘要 |
<p>PURPOSE:To separate waste automobile parts into resin members and metal members without deteriorating them so as to reclaim waste parts efficiently, by immersing the waste automobile parts in a specific aqueous alkaline solution. CONSTITUTION:The concentrate is made up of 0.15-0.6pt.wt. alkali metal (e.g. sodium) (A), 0.2-1pt.wt. phosphate (e.g. sodium phosphate) (B), 0.2-1pt.wt. borate (e.g. sodium borate) (C) and 0.1-0.6pt.wt. surfactant (preferably, nonionic surfactants) (D), and the concentrate is mixed with water in a ratio of about 1-15:100 to prepare the aqueous alkaline solution to be used. Waste parts of automobiles (e.g. side visors, and door moldings) comprising composite parts including resin parts and metal parts are immersed in the aqueous alkaline solution above at 20-85 deg.C for 30min or more to separate them from each other to be reclaimed.</p> |