橘油回收EPS工艺优化

Optimization of Process Condition for Recovering Expandable Polystyrene by Orange Oil

采用水蒸气蒸馏法从橘皮中提取橘油，并以其为溶剂、以无水乙醇为沉淀剂回收 EPS ，通过单因素试验和正交试验优化回收工艺，对回收的 EPS 进行性能检测。正交试验极差分析结果表明：当EPS的粒径为 0.5 mm 、橘油与 EPS 的质量比为 2:1 、乙醇与橘油的体积比为 1:1 时， EPS 的回收率最高，达 90.4% 。方差分析结果显示：乙醇与橘油的添加比例对 EPS 的回收率影响显著，而 EPS 粒径、橘油与 EPS 的添加比例对EPS的回收率影响不显著。回收得到的 EPS 与标准品相比，其色泽、密度和玻璃化温度无明显变化，但有淡淡橘香味。

The orange oil was extracted from orange peel by steam distillation. The orange oil was used as solvent and ethanol as precipitant to recover the expanded polystyrene with process condition optimized by orthogonal experiment.Then some properties of the recovered expanded polystyrene were tested. The results of range analyses showed that the optimum process parameters for expanded polystyrene recovering were particle size of EPS being 0.5 mm, the ratio of orange oil and expanded polystyrene being 2：1, and the ratio of orange oil and precipitant being 1：1 with the recovery rate of expanded polystyrene reaching 90.4%. The results of ANOVA analyses showed that the ratio of orange oil and precipitant had conspicuous effects on recovery rate. However, particle size and the ratio of orange oil and precipitant had no obvious effects on recovery rate. The color, density and glass transition temperature of recovered expanded polystyrene demonstrated no obvious changes compared to standard substance except for the light orange fragrance.