Zhang S F, Zhang L L, Luo K, Sun Z X, Mei X X
College of Light Industry and Energy, Shaanxi University of Science and Technology, Weiyang District, Xi'an City, Shaanxi Province, 710021, PR China.
Waste Manag Res. 2014 Apr;32(4):317-22. doi: 10.1177/0734242X14525823. Epub 2014 Mar 12.
The separation properties of the aluminium-plastic laminates in postconsumer Tetra Pak structure were studied in this present work. The organic solvent blend of benzene-ethyl alcohol-water was used as the separation reagent. Then triangle coordinate figure analysis was taken to optimize the volume proportion of various components in the separating agent and separation process. And the separation temperature of aluminium-plastic laminates was determined by the separation time, efficiency, and total mass loss of products. The results show that cost-efficient separations perform best with low usage of solvents at certain temperatures, for certain times, and within a certain range of volume proportions of the three components in the solvent agent. It is also found that similar solubility parameters of solvents and polyethylene adhesives (range 26.06-34.85) are a key factor for the separation of the aluminium-plastic laminates. Such multisolvent processes based on the combined-system concept will be vital to applications in the recycling industry.
本研究对消费后利乐包装结构中铝塑复合板的分离特性进行了研究。采用苯 - 乙醇 - 水的有机溶剂混合物作为分离试剂。然后通过三角坐标图分析来优化分离剂中各组分的体积比例以及分离过程。并且铝塑复合板的分离温度由分离时间、效率和产品的总质量损失来确定。结果表明，在特定温度、特定时间以及溶剂剂中三种组分的特定体积比例范围内，以低溶剂用量实现的经济高效分离效果最佳。还发现溶剂与聚乙烯粘合剂相似的溶解度参数（范围为26.06 - 34.85）是铝塑复合板分离的关键因素。这种基于组合系统概念的多溶剂工艺对回收行业的应用至关重要。
