您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 5    October 2008

[PDF Download]    

    

Purification mechanism of copper electrolyte by As(Ⅲ)
XIAO Fa-xin(肖发新)1, 2, ZHENG Ya-jie(郑雅杰)1, WANG Yong(王 勇)1,
JIAN Hong-sheng(简洪生)1, HUANG Xing-guan(黄兴远)2, MA Yu-tian(马玉天)1

1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China

Abstract:A new kind of precipitate, antimony arsantimonate, was found during the precipitation reactions in acidic solution containing As(Ⅲ), Sb(Ⅲ) and Sb(Ⅴ) by means of chemical analysis, SEM, XRD and IR spectrometry. The results show that the As content in antimony arsantimonate increases with the increase of n(As(Ⅲ))/n(Sb) in solution and the content of component Sb(Ⅲ) and Sb(Ⅴ) remains almost constant with the variation of n(Sb(Ⅲ))/n(Sb(Ⅴ)) in solution. The antimony arsantimonate is a kind of floccules with size of 1−5 μm. The crystal performance of the compound gets better with the decrease of n(As(Ⅲ))/n(Sb), the cell parameter of which is near to 10.33×10−10 m under different n(As(Ⅲ))/n(Sb) and As atom locates on the surface, not in the inner of the grain. The chemical bonds of As—OH, Sb—OH, As—O—Sb, Sb—O—Sb and O—H of the precipitate are included in the precipitate. The chemical structure of precipitate is described as Sb(OH)2—O—[Sb(OH)3—(O—As(OH)—O—Sb(OH)3)3]—O—Sb(OH)2•xH2O. The structure analysis shows that the copper electrolyte can be purified by As(Ⅲ) because the antimony arsantimonate precipitate forms.

 

Key words: arsenic; purification; copper electrolyte; mechanism; antimony arsantimonate

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn