Design and modeling of optimal distillation sequence for recovery of valuable components from a waste photoresist stripper

作者：Chaniago Yus Donald; Kim Jae Kyeong; Park Myung Jun; Koo Kee Kahb^*; Lee Moonyong^*

来源：Journal of Material Cycles and Waste Management, 2016, 18(2): 366-376.

DOI：10.1007/s10163-014-0339-6

• Waste solvent recovery
• Photoresist stripper
• Distillation sequence
• Waste solvent treatment
• HEP (1-hydroxyethylpiperazine)
• MDG (methyl diglycol)

Currently, waste photoresist stripper from the semiconductor industries is generally incinerated at high temperatures or processed as a high-calorie fuel, which can have adverse effects on the environment and economy. Recovery of valuable solvents from waste photoresist strippers is, therefore, very important for thin flat transistor-liquid crystal display (TFT-LCD) manufactures to reduce the production costs and protect the environment against industrial waste. In the present work, systematic laboratory-scale distillation experiments were carried out to regenerate the organic solvents from the waste photoresist stripper and determine if they are feasible to recycle for commercial TFT-LCD grade chemicals: in particular, 1-hydroxyethylpiperazine and methyl diglycol were mainly tried to retrieve. Based on the experiment results, possible alternative distillation sequences were examined through intensive techno-economic analysis using a rigorous process simulator. As a result, an optimal distillation sequence and condition were drawn to separate valuable organic solvents from waste photoresist stripper for a commercial purpose recovery process.

• 出版日期2016-4