【摘要】 简介了磷酸净化的研究进展;研究了正丁醇、异丁醇、异戊醇、环己醇、TBP、SSF和SF2萃取剂的萃取性能,确定了SSF为一种综合性能比较好的混合萃取剂;以SSF萃取剂净化用海底磷钙土制备的粗磷酸,采用五级错流萃取、一级洗涤、三级反萃的净化流程,萃取率为80 3%,洗涤损失为10 5%,反萃率为99%,综合净化酸的得率为71 2%。更多还原

【Abstract】 The progress of purifying technology for phosphoric acid is briefly introduced. Extraction capacities of n-Butanol, iso-Butyl alcohol, iso-Amyl alcohol, Cyclohexanol, TBP, SSF and SF2 are examined. On the basis of above-mentioned research work,it is confirmed that SSF is a mixture extractant with highly integrated capability. Under the condition of adopting a flowsheet using five-stage crossflow extraction, one-stage washing and three-stage re-extraction, the crude phosphoric acid made from seafloor phosphorite is purified by SSF extractant, with an extraction ratio of 80.3%, a washing loss of 10.5%, a re-extraction ratio of 99% and a yield ratio of 71.2%.更多还原