摘要
报道了以三（３－胺基丙基）胺（ｔｒｐｎ）在Ｃｄ（ＣｌＯ４）２·６Ｈ２Ｏ存在下，分别与２，６－二甲醛基－４－甲苯酚（ｄｍｐ）及２，６－二甲醛基－４－溴苯酚（ｄｂｐ）的钠盐发生［２＋２］和［２＋３］的希夫碱缩合反应，合成了两个新的双核镉（Ⅱ）多氮穴合物［Ｃｄ２Ｌ１］ＣｌＯ４和［Ｃｄ２Ｌ２（Ｈ２Ｏ）］·２ＣｌＯ４·０．５ＣＨ３ＯＨ．晶体结构表明：穴合物中两个镉（Ⅱ）原子均处于相似的环境，每个镉（Ⅱ）原子的配位数均为７（Ｎ４Ｏ３），处于变形十面体的中心，穴合物［Ｃｄ２Ｌ１］＋中的两个镉（Ⅱ）通过三个酚氧原子为桥；穴合物［Ｃｄ２Ｌ２（Ｈ２Ｏ）］２＋中的两个镉（Ⅱ）则是通过二个酚氧原子和外加一个参与配位的水分子为桥连接起来．并进一步比较了［Ｃｄ２Ｌ１］，［Ｃｄ２Ｌ２（Ｈ２Ｏ）］２＋及另两个相似的镉（Ⅱ）双核穴合物［Ｃｄ２Ｌ３］＋，［Ｃｄ２Ｌ４］＋的稳定性大小．
A simple and feasible way of comprehensively utilizing the Qingping phosphorus ore waste with high Al content and low P content is introduced.By adding (NH 4) 2SO 4 to the H 2SO 4 solution which had been used to extract the calcined phosphorus ore waste,on the acidulated condition,at an ordinary pressure and a rather low temperature of 5℃,NH 4Al(SO 4) 2·12H 2O was enormously crystallized and Al was separated from P.Up till now,the total extraction yield of Al 2O 3 has been over 80% and its recovery per cent over 90%.Finally,from the filter liquor from which the residual Fe 3+ ,Al 3+ and part of SO 2- 4 had been removed,qualified phosphatic feed and fertilizer were obtained by stepwise neutralization and precipitation with lime water.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第4期493-499,共7页
Journal of Sichuan University(Natural Science Edition)
基金
国家自然科学基金
福州结构化学国家重点实验室资助
关键词
晶体结构
多氮穴合物
双核穴合物
镉
合成
The Qingping phosphorus ore waste,comprehensive utilization,separation of Al from P,NH 4Al(SO 4) 2·12H 2O,CaHPO 4·2H 2O as feed,phosphatic fertilizer
