Abstract: Titanium is extracted from the disused SCR denitration catalysts by sulfuric acid hydrolysis process.The factors that influence the acidolysis ratio of titanium extraction are studied systematically and the suitable parameters are confirmed.The experimental results show that the main factors affecting the acidolysis ratio includes the fineness of disused catalyst,acid concentration,the ratio of acid to disused catalyst,reaction time and reaction temperature.When the material fineness is 325 mesh,the acid concentration is 95%,the ratio of acid to disused catalyst is 1.5:1-1.6:1,reaction time is 8 h and reaction temperature is 190℃,the ratio of the acidolysis can reach 85% and the concentration of obtained titanium solution can reach about 180 g·L-1.Meta titanic acid can be generated after hydrolysis of the obtained titanium solution,and can meet the requirement of commodity grade indexes.
吴涛, 刘显彬, 席文昌. 从废弃脱硝催化剂进行钛分离中酸解率影响因素研究[J]. 现代化工, 2018, 38(1): 115-117.
WU Tao, LIU Xian-bin, XI Wen-chang. Study on influence factors of acidolysis ratio in separating titanium from exhausted SCR denitration catalysts. Modern Chemical Industry, 2018, 38(1): 115-117.