混合溶剂分离铝塑复合包装材料

Study on Separation Process of Aluminum-plastic Composites with Mixed Organic Solvent by Triangle Coordinate Graph

关键词:  分离剂  铝塑复合材料  分离  三角形坐标图

Key Words:benzene alcohol-water  aluminum-plastic composite  separation  triangle coordinate graph

摘要:对纸铝塑复合包装材料中的铝塑分离方法和工艺进行了研究，以苯-无水乙醇-水混合液为分离剂，根据铝塑分离时间、分离率、铝塑总得率，采用三角形坐标图分析法，优化了分离剂中3种组分的体积比及铝塑复合材料分离的最佳工艺；考察了分离剂的温度、三组分的体积比对铝塑分离效果的影响，并对各组分在铝塑分离中所起作用进行了分析研究。结果表明，当分离剂中3种溶剂的体积比V(苯)∶V(无水乙醇)∶V(水)为30∶20∶50、温度60℃、分离时间为5.85 min时，铝塑分离效果最佳，此时分离率为100%，铝塑总得率可达97.46%。通过对塑料分离前后的红外光谱图对比可知，分离剂没有改变塑料的性质。

Abstract:The separation technology of aluminum-plastic composite in Tetra Pak structure was studied in this work. The mixed organic solvent, benzene, absolute ethyl alcohol and water, were used as separation agent. The triangle coordinate graph was applied to determine the volume proportion of each solvent in the mixed system, and the separation process of aluminum-plastic composite was optimized. The effect of the mixed organic solvent temperature, the volume proportion of each solvent on the separation efficiency and the functions of various solvents were investigated. The results showed that when the volume proportion of the three compositions in solvent agent is V(benzene)∶V(absolute ethyl alcohol)∶V(water)=30∶20∶50, temperature at 60℃ and separating time 5.85 minutes, the aluminum-plastic composite is well separated, and total separated products of 97.46% can be obtained, which are relatively pure aluminum and plastic. The results of infra-red spectrum analysis showed that the plastic property are not changed by the solvent in separating operation.