Technological process and optimum design of organic materials vacuum pyrolysis and indium chlorinated separation from waste liquid crystal display panels.
In this study, a technology process including vacuum pyrolysis and vacuum chlorinated separation was proposed to convert waste liquid crystal display (LCD) panels into useful resources using self-design apparatuses. The suitable pyrolysis temperature and pressure are determined as 300°C and 50 Pa at first. The organic parts of the panels were converted to oil (79.10 wt%) and gas (2.93 wt%). Then the technology of separating indium was optimized by central composite design (CCD) under response surface methodology (RSM). The results indicated the indium recovery ratio was 99.97% when the particle size is less than 0.16 mm, the weight percentage of NH4Cl to glass powder is 50 wt% and temperature is 450°C. The research results show that the organic materials, indium and glass of LCD panel can be recovered during the recovery process efficiently and eco-friendly.
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
En
E
Ma
Zhenming
Z
Xu
D002713:Chlorine / Q000737:chemistry; D003247:Conservation of Natural Resources / Q000379:methods; D004867:Equipment Design; D005740:Gases; D005898:Glass; D006256:Hazardous Waste; D007204:Indium / Q000032:analysis* / Q000737:chemistry*; D050866:Liquid Crystals / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry; D011312:Pressure; D012037:Refuse Disposal / Q000379:methods; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D014618:Vacuum
D005740:Gases; D006256:Hazardous Waste; D009930:Organic Chemicals; D012997:Solvents; D007204:Indium; D002713:Chlorine
Chlorination; Indium; Optimization; Vacuum pyrolysis; Waste LCD panel