摘要
研究了溶剂法回收聚苯乙烯泡沫塑料(EPS)的工艺,通过单因素实验考察了以甲苯/二氯甲烷为混合溶剂溶解EPS,然后通过脱溶/沉淀法工艺制备聚苯乙烯颗粒的回收工艺条件。结果表明,较佳工艺条件为甲苯/二氯甲烷混合溶剂中甲苯体积分数为80%,溶解温度40℃,EPS颗粒体积1.0 cm3;脱溶法工艺中采用加水蒸馏法脱除溶剂;沉淀法工艺中,沉淀剂的用量为溶剂量的1.5倍体积,沉淀温度为室温,沉淀时间1 h;EPS回收率可达98%以上。
Processes of recycling the waste foamed polystyrene plastics （EPS） by solvent recovery method were studied. EPS is dissolved by toluene/dichloromethane mixed solvents and then the polystyrene particles .are prepared by the desolventizing/precipitation process. The recovery process conditions were investigated through the single factor experiments. The results showed that better technical conditions： the toluene volume ratio of toluene/dichloromethane mixed solvent is 80 %, solution temperature 40℃, EPS particle size of 1.0 cm3. Desolventizing technological process used in water distillation to remove solvent. Precipitation process is as follows： the precipitation agent dosage is 1.5 times the volume of solvent, precipitation temperature is room temperature, precipitation time is lb. EPS recoveries is up to 98%.
出处
《浙江科技学院学报》
CAS
2010年第2期120-124,共5页
Journal of Zhejiang University of Science and Technology
基金
浙江科技学院教学研究项目(2008-B18)
