三元体系M(NO_3)_n-CH_3CONHCONH_2-H_2O相平衡的研究  

Phase equilibrium of ternary system M(NO_3)_n- CH_3CONHCONH_2 - H_2O

作　　者：陈强[1] 崔斌[1] 姜波 杨亚婷[1] 张逢星[1] 郭志箴[1] 

机构地区：[1]西北大学化学系,陕西西安710069

出　　处：《宝鸡文理学院学报（自然科学版）》2000年第1期32-35,共4页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

基　　金：陕西省教育委员会专项科研基金!资助课题 ( 95 KJ10 2 )

摘　　要：研究了题述2个(M=Zn,n=2;M=La,n=3)三元体系在30℃的相平衡,测定了饱和溶液的溶解度及其折光指数,绘制了相应的溶度图和折光指数-组成关系图。La(NO3)3体系溶度曲线及折光指数曲线均由3支组成,分别与La(NO3)3·6H2O、La(NO3)3·3H2O和CH3CONHCONH2相对应。2个共饱点的组成分别为:La(NO3)358.34%,CH3CONHCONH216.53%和La(NO3)358.31%,CH3CONHCONH24.52%。Zn(NO3)2体系溶度曲线及折光指数曲线均由两支组成,分别与Zn(NO3)2·6H2O和CH3CONHCONH2相对应,该体系为简单共饱型,共饱点的组成含Zn(NO3)250.86%和CH3CONHCONH211.70%。The solubility and refractive indicesof saturated solution of the title systems (M=Zn,n = 2 ;M=La,n=3 ) at 3 0℃ have been studied and the corresponding equilibrium diagrams are con- structed.The solubility curves and refractive index curves of La(NO3) 3system consistof three branch- es,corresponding to La(NO3) 3· 6 H2 O,L a(NO3) 3· H2 O and CH3CONHCONH2 .The two eutectic compositions are:La (NO3) 358. 3 4% ,CH3CONHCONH2 1 6 . 53 % and La (NO3) 358. 3 1 % , CH3CONHCONH2 4 .52 % . The system of Zn(NO3) 2 isa simple one. The eutectic compositions is :Zn(NO3) 2 50 .86 % and CH3CONHCONH2 1 1 .70 % .The phase equilibrium data can be used in formulat- ing controlled release fertilizers.

关 键 词：三元体系 相平衡 缓释肥料 乙酰脲 硝酸镧 

分 类 号：O642.42[理学—物理化学] TQ449.1[理学—化学]