区域熔融法提纯工业黄磷的数学模型与实验研究  

Experimental and Numerical Modeling Investigation on Purification Process of Phosphorus by Zone Melting

作　　者：任永胜[1] 李军[1] 马睿[1] 许杰淋[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《高校化学工程学报》2009年第6期933-938,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家"十一五"科技支撑计划(2007BAE58B01)

摘　　要：为了满足高纯磷酸以及半导体等行业对高纯磷的需求,采用了区域熔融法对工业黄磷进行提纯,分析了区熔法提纯工业黄磷的原理,并根据所测有效分布系数建立整个区熔过程中杂质分布的数学模型。实验考察了熔区长度以及熔区移动次数等对杂质分布的影响,研究结果表明,采用区域熔融法提纯黄磷具有良好的效果,能有效地脱除所考察的13种杂质(Fe,Ca,Co,Mg,Cr,Cd,Mn,Ni,Cu,Pb,Zn,Al,As);当熔区为区熔管长度的0.1倍时,熔区移动速度为5mm?h?1,经过10次区熔后,60%的黄磷产品纯度达到99.99999%(7N),完全能够满足半导体行业以及高纯磷酸对磷的纯度要求;所建立的杂质分布数学模型能够很好地描述杂质在区熔过程中的分布情况。In order to meet the demand of high-pure phosphoric acid and semiconductor industries, a combined theoretical and experimental approach was undertaken to find out the influences of zone length and times of zone pass on the solute distribution in ingot after the purification process of industrial yellow phosphorus by zone melting method. A numerical model was provided to predict the solute redistribution at any position of the ingot. The experimental results indicate that purifying phosphorus by zone melting method is appropriate, and the analysis results of the ICP-MS （inductively coupled plasma mass spectrometry） show that the removal results of the targeted 13 impurity ions （Fe, Ca, Co, Mg, Cr, Cd. Mn, Ni, Cu, Pb, Zn, Al, As） are satisfactory. Through the comparison of the experimental results with the theoretical predictions, it shows that the numerical model proposed can be used to predict the solute concentration distribution in ingot after zone melting process. The experimental results also indicate that, using purification process of zone melting, the purity of 60% product yellow phosphorus could easily reach higher than 99.99999% after 10 zone passes with zone length of 10% ingot length and travel rate of 5 mm·h^-1.

关 键 词：提纯 区域熔融 数学模型 黄磷 杂质分布: 

分 类 号：TQ126.316[化学工程—无机化工]