N503萃取分离铁铟的研究

Study on separation of indium and iron by extraction with di(1-methyl-heptyl) acetamide(N503)

对真空炉锗渣经氯化蒸馏提锗后的蒸馏残液进行了萃取研究,以N503为萃取剂,研究了残液的酸度、萃取相比、有机相组成、萃取时间等因素对铟、铁萃取率的影响.结果表明,在有机相组成为φ(N503)=50%,φ(异辛醇)=10%,φ(煤油)=40%,W/O相比为3:1,震荡及静止时间均为5 min条件下,当萃取残液酸度为3.4 mol/L,其中In及Fe含量分别为2045 mg/L和5201 mg/L时,采用三级逆流萃取,可达到铁萃取率为98%以上,铟铁分离比达到5000以上.

Experiment on In/Fe extraction of lixiviated liquid from chlorination distilled vaeuum furnace germanium residue was studied. With N503 as the extractant, the influence of extraction feed aeidity, extraction phase ratio （V/V）, organic phase composition and extraction time on In/Fe extraction efficiency was examined. The results showed that under the conditions of organic phase being φ（NS03）=50%, φ（isooctanol）=10% and φ（kerosene）=40%, W/O=3 ： 1 and both shaking time and standstill time being 5 minutes, and when extraction feed acidity was 3.4mol/L, in which In was 2045mg/L and Fe was 5201mg/ L, the extraction rate of Fe reached above 98% and the separation ratio of In and Fe was over 5000 by 3- stage eountercurrent extraction process.