论文部分内容阅读
以d-柠檬烯为溶剂、正丙醇为沉淀剂建立了溶剂法再生废旧电视机外壳塑料(主要成分为高抗冲聚苯乙烯,HIPS)的新工艺,考察了外壳塑料溶液中十溴联苯醚在固液两相的分布特征及影响因素,探讨了反溶剂沉淀过程中十溴联苯醚的转移机制,提出了减少十溴联苯醚进入再生HIPS产品的措施,通过实验确立了从废旧电视机外壳塑料中分离十溴联苯醚的工艺条件.当电视机外壳塑料浓度为20%,使用管式离心分离机,在温度30℃、转速12000r/min下能去除溶液中87.7%的十溴联苯醚;每100mL离心液补加40mL柠檬烯溶解十溴联苯醚颗粒后,再用等体积正丙醇在50℃下沉淀HIPS,所得再生塑料的多溴联苯醚总含量低于0.1%,十溴联苯醚的脱除率超过99%.
Using d-limonene as solvent and n-propanol as precipitating agent, a new process of solvent-based recycling of plastic for waste TV shell (the main component is high impact polystyrene (HIPS)) was investigated. The effects of decabromobiphenyl Ether in the solid-liquid two-phase distribution characteristics and influencing factors in the anti-solvent precipitation process of decabromodiphenyl ether transfer mechanism, to reduce the decabromodiphenyl ether to enter the recycled HIPS products measures established through experiments established from the waste TV shell plastic separation of decabromodiphenyl ether process conditions.When the TV shell plastic concentration of 20%, the use of tubular centrifuge at a temperature of 30 ° C, speed 12000r / min to remove the solution of 87.7% of the ten Bromodiphenyl ether; 40mL of limonene is added per 100mL of centrifugation solution to dissolve decabromobiphenyl ether particles, and then an equal volume of n-propanol precipitates at 50 ℃ HIPS, the resulting recycled polybrominated diphenyl ethers total content of less than 0.1%, ten Bromine diphenyl ether removal rate of more than 99%.