程亮,徐丽,侯翠红,雒廷亮,张保林,刘国际

• 1:郑州大学化工与能源学院

摘要(Abstract)：

生产纳米腐植酸增值尿素过程中,纳米腐植酸在尿素水溶液中溶解度数据尤为重要。采用等温溶解平衡法研究了纳米腐植酸在298、303及308 K尿素水溶液中溶解度及密度数据;按照相平衡数据绘制相应的相图。湿渣法和X-射线粉末衍射法(XRD)相结合方法对平衡固相组成鉴定。实验结果表明:该三元固液相体系相图存在4个相区,分别为纳米腐植酸及尿素纯固相结晶区,纳米腐植酸与尿素共结晶区和未饱和液相区,1个共饱和点,且该体系为简单共饱和型,无固溶体形成。该三元体系308 K与298 K、303 K相图相比,308 K时未饱和液相区增大,纳米腐植酸-尿素共结晶区减小。298、303和308 K下,其相应共饱和点处密度最大值分别为1.2145、1.2333及1.2502 g?cm?3。

关键词(KeyWords)： 纳米腐植酸;增值尿素;相平衡;溶解度;固溶体

Abstract:

Keywords:

基金项目(Foundation): “十二五”国家科技计划(2011BAD11B05);; 河南省科技厅基础与前沿项目(2011A530008)

作者(Author): 程亮,徐丽,侯翠红,雒廷亮,张保林,刘国际

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