摘要
提出了以三异辛胺作萃取剂、H2 O作反萃取剂从钛白水解废酸中萃取回收硫酸的新工艺。考察了萃取剂浓度、相调节剂浓度、相比及温度对萃取和反萃取的影响 ,并进行了模拟试验。在以 4 0 %三异辛胺、2 5 %仲辛醇和 35 %航空煤油 (均为质量分数 )为萃取有机相 ,相比为 2 ,以H2 O为反萃剂 ,相比为 1.5的条件下 ,质量浓度为 14 6 .0 2 g/L的废酸经 8级萃取和 6级反萃取 ,硫酸回收率达到 91.81% ,产品酸质量浓度达 119.
A new process using tri-isoctylamine as the extractant and water as the back-extractant was developed to recover sulfuric acid from hydrolysis waste acid in titanium dioxide production.The effects of extractant concentration,phase regulators,phase ratio and temperature on extraction and back-extraction were examined and simulation tests were carried out.The extraction organic phase is composed of 40% tri-isoctylamine,25% 2-octanol and 35% aviation kerosene.The phase ratio for extraction is 2 and that for back-extraction is 1.5. The waste acid with mass concentration 146.02 mg/L was treated by 8-stage extraction and 6-stage back-extraction.The recovery of sulfuric acid is 91.8% and the mass concentration of recovered sulfuric acid is 119.73 g/L.
出处
《化工环保》
CAS
CSCD
北大核心
2003年第4期225-228,共4页
Environmental Protection of Chemical Industry
关键词
钛白
萃取
硫酸
综合利用
titanium dioxide
extraction
sulfuric acid
comprehensive utilization
