以十二烷基硫酸钠为起泡剂浮选分离废旧ABS/HIPS的研究  

Study on Flotation Separation of Waste ABS/HIPS with Sodium Dodecyl Sulfate as the Foaming Agent

作　　者：李建波 李迎春[1] 杜栓丽[2] 贺茂勇[1] 贾帅[2] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]中北大学化工与环境学院,山西太原030051

出　　处：《塑料科技》2018年第1期108-111,共4页Plastics Science and Technology

摘　　要：采用自制的浮选实验装置，以十二烷基硫酸钠为塑料浮选起泡剂．单宁酸为润湿剂。对废旧丙烯腈．丁二烯．苯乙烯共聚物，高冲击强度聚苯乙烯（ABS／HIPS）混合塑料进行浮选分离。初步考察了起泡剂十二烷基硫酸钠的浓度．搅拌时间．浮选时间及浮选柱液面高度对废IBABSIHIPS浮选效果的影响。结果表明：在十二烷基硫酸钠浓度为20mg／L，搅拌时间为3min．浮选时间为4min．通气流量为5L／min．浮选柱液面高度为30cm时，可以实现废IBABS／HIPS的分离。其中，上浮产物HIPS的纯度达到95．00％，回收率达到98．95％；下沉产物ABS的纯度达到97．71％，回收率达到95.61％。With sodium dodecyl sulfate as a new plastic flotation foaming agent, tannic acid as the wetting agent, the waste acrylonitrile butadiene styrene copolymer/high impact polystyrene （ABS/HIPS） mixed plastics was separated by using self-made flotation experimental device. The effects of foaming agent concentration, stirring time, flotation time and liquid level in flotation column on the flotation efficiency of waste ABS/HIPS plastics were investigated preliminarily. The results show that： the separation of waste ABS/HIPS plastic can be achieved when sodium dodecyl sulfate concentration is 20 mg/L, stirring time is 3 min, flotation time is 4 min, air flow rate is 5 L/min, and liquid level in flotation column is 30 cm. The purity of floating product HIPS reaches 95%, the recovery rate of it reaches 98.95%; the purity of sinking product ABS reaches 97.71%, the recovery rate reaches 95.61%.

关 键 词：废旧塑料 丙烯腈-丁二烯-苯乙烯共聚物 高冲击强度聚苯乙烯 十二烷基硫酸钠 浮选分离 

分 类 号：X783.2[环境科学与工程—环境工程]