摘要
We reported a low temperature method of dealing with waste sulfuric acid in titanium dioxide industry.By studying the four impact factors: pre-cooling,temperature,time and centrifugal,we optimized the experimental conditions: pre-cooling at 2℃ in 3h,freeze crystallization at-35℃～-20℃ in 18h,and separation of ferrous sulfate and ice from acid at 3000～4000rpm.The concentration of sulfuric acid achieved 27%～30%,while that of ferrous sulfate decrease to 0.5%.
We reported a low temperature method of dealing with waste sulfuric acid in titanium dioxide industry. By studying the four impact factors： pre-cooling, temperature, time and centrifugal, we optimized the experimental conditions： pre-cooling at 2℃ in 3h, freeze crystallization at -35 ℃ ～ -20℃ in 18h, and separation of ferrous sulfate and ice from acid at 3000 ～ 4000rpm. The concentration of sulfuric acid achieved 27% ～ 30%, while that of ferrous sulfate decrease to 0.5%.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2009年第12期1708-1710,共3页
Chemical Research and Application
关键词
钛白废酸
浓缩
冷却
结晶
硫酸亚铁
waste acid in titanium dioxide industry
concentration
freeze
crystallization
ferrous sulfate
