摘要
以分析纯硝酸锶为原料，采用硝酸锶分次重结晶同时加入适量的硫酸除去钡及其它杂质，加入适量草酸除去钙杂质，然后选择合适的ｐＨ值加入高纯草酸制得高纯草酸锶沉淀，经烘干灼烧后得到高纯氧化锶产品。产品中主要杂质钡含量小于２μｇ／ｇ，钙含量小于５μｇ／ｇ，产品纯度大于９９．９９５％。
The analytical reagent strontium nitrate is used as raw material,appropriate amount of sulfuric acid is added to remove barium salt and oxalic acid to remove calcium salt and other impurities in the raw material while strontium nitrate is being multi-recrystallized.The product of high-purity strontium oxide can be acquired after stoving and burning the precipitate of high-purity strontium oxalate,which is formed by means of adding high-purity oxalic acid under the condition of appropriate pH range.The contents of barium and calcium which are main impurities in the product are less then 2 μg/g and 5 μg/g respectively,and its purity is higher than 99.995%.
出处
《无机盐工业》
CAS
1998年第6期8-9,共2页
Inorganic Chemicals Industry
关键词
高纯
氧化锶
提纯
分离
high-purity,strontium oxide,purification
