湿法磷酸净化技术研究现状及发展方向.pdfVIP

第 40卷第 2期 无机盐工业 2008年 2月 INORGAN IC CHEM ICALS INDUSTRY 9 , , , (, 610065) : , : , , , , ( SO2- ) , 4 ( P O ) , , 2 5 : ; ; ; : TQ126. 35 : A : 1006- 4990( 2008) 02- 0009- 04 Cu rrent research s tatus and developm ent d irection of pur ification technology of wet- p rocess phosphoric acid Zhong Benhe, Li un, Guo X iaodong, W u Deqiao (S chool of Chem ical E ng ineering, S ich uan Un iv ersity, Chengd u 610065, Ch ina) A bstrac t: The commonly used m ethods for purify ing w et- pro cess phosphor ic acid (W PA) and the ir advantages and d isadvantages w ere summ ar ized. Industrialized process flow of several typical of solvent ex traction m ethods and the ir current research status in China and abroad w ere introduced. Especially, tw o new ly developed pur ification technolog ies forW PA by solvent ex traction m ethod in Ch ina were introduced in detail. From the compar ison of the d ifferences and s mi ilarities of the abov em entioned two technolog ies, conclusions w ere reached: the new technolog ies are of short w ork ing process, less inv est- m ent, low production co st, effic iently elmi ination of SO2- and high recovery of P O ; and they havew ide app lication pro spect 4 2 5 w ith propr ietary intellectual property r ights. K ey w ord s: w et- process phosphor ic ac id; pur ification; new technology; solvent ex traction , () , , , , , ,