磷钨酸对铝塑复合材料的分离效应研究

Study on the Separation Effect of Phosphotungstic Acid on Aluminum-Plastic Composite Materials

摘要: 我国是铝塑复合材料消费量最大的国家之一，但其回收率却很低。本研究以绿色无污染、高酸性的磷钨酸作为铝塑分离剂，考察了磷钨酸浓度、液固比、分离温度对铝塑分离时间和铝塑损失率的影响。研究结果表明，磷钨酸是一种优异的分离剂，在浓度为0.6 mol/L，液固比为300 L/kg，分离温度为90℃条件下，铝塑完全分离时间为32 min，铝塑损失率为12.9%。开发低挥发性且绿色环保的固体杂多酸有望成为实现铝塑高效分离回收的新型分离剂。

Abstract: China is one of the countries with the largest consumption of aluminum-plastic composite materials, but its recycling rate is very low. In this study, green pollution-free, highly acidic phosphotungstic acid was used as the aluminum-plastic separation agent, and the effects of phosphotungstic acid concentration, liquid-solid ratio, and separation temperature on the separation time of aluminum-plastic and the loss rate of aluminum-plastic were investigated. The research results show that phosphotungstic acid is an excellent separating agent. At a concentration of 0.6 mol/L, a liquid-to-solid ratio of 300 L/kg, and a separation temperature of 90℃, the complete separation time of aluminum and plastic is 32 min. The plastic loss rate is 12.9%. The development of low volatility and environmentally friendly solid heteropoly acid is expected to become a new type of separating agent for achieving high-efficiency separation and recovery of aluminum and plastic.