A study on the low-temperature wet synthesis of hydrofluoric acid from synthetic calcium fluoride and waste sulfuric acid

Min Fa Lin, Chih Ping Chang, Ken Lin Chang, Wen Jhy Lee, Jhong Lin Wu, Po Han Chen

研究成果: Conference article同行評審

摘要

An innovative method for utilizing synthetic calcium fluoride (CaF2), recovered from fluoride-containing semiconductor wastewater, and waste sulfuric acid (H2SO4) to produce hydrofluoric acid (HF) was investigated. The research was set to study the low-temperature production of HF via the reaction of synthetic CaF2 and waste H2SO4. The impact of H2SO4 concentration and total volume (H2SO4 + H2O)/CaF2 ratio, drying temperature of synthetic CaF2 on HF productivity were investigated in this study. HF yield increased with increasing H2SO4 concentration and total volume/CaF2 ratio under room temperature. In addition, the HF produced in the reactions involving the 105 oC-dried synthetic CaF2 were higher than the 600 oC-dried synthetic CaF2 ones. The study will not only find uses for this semiconductor wastes but also provide a greener alternative to the current commercial production of HF.

原文English
文章編號12098
期刊IOP Conference Series: Earth and Environmental Science
463
發行號1
DOIs
出版狀態Published - 2020 四月 6
事件International Conference on Sustainable Energy and Green Technology 2019, SEGT 2019 - Bangkok, Thailand
持續時間: 2019 十二月 112019 十二月 14

All Science Journal Classification (ASJC) codes

  • 環境科學 (全部)
  • 地球與行星科學(全部)

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