288K下Li^+,K^+//CO_3^(2-),B_4O_7^(2-)-H_2O四元体系的相平衡  

EQUILIBRIUM OF QUATERNARY SYSTEM Li^+,K^+//CO_3^(2-),B_4O_7^(2-)-H_2O AT 288 K

作　　者：殷辉安[1] 桑世华[1] 唐明林[1] 曾英[1] 

机构地区：[1]成都理工大学化工与制药系,四川成都610059

出　　处：《磁流体发电情报》2004年第3期464-467,共4页

基　　金：国家自然科学基金资助项目 (No 49773 2 0 0 )~~

摘　　要：Solubilities and properties (density, conductivity and pH value) of solutions in the quaternary system Li +,K +//CO 2- 3,B 4O 2- 7-H 2O at 288 K were experimentally studied with the isothermal equilibrium method. The phase diagram of the system consisted of two invariant points E and F, five univariant curves, and four crystallization fields that belonged to K 2CO 3·3/2H 2O,Li 2 B 4O 7·3H 2O, K 2 B 4O 7 ·4H 2O and Li 2CO 3. The composition of the solution corresponding to E was w(CO 2- 3)=2.27 %, w(B 4O 2- 7) =6.05 %, w(K + ) =4.30%,w(Li + )=0.30 % and the equilibrium solids were Li 2 B 4O 7· 3H 2O+K 2 B 4O 7·4H 2O+Li 2CO 3;The composition of the solution for F was w(CO 2- 3) =22.45%,w(B 4O 2- 7)=1.88%,w(K + )=29.96%,w(Li + )=0.03% and the equilibrium solids were K 2CO 3·3/2H 2O+ K 2 B 4O 7·4H 2O+Li 2CO 3. K 2CO 3 possesses strong salting-out effect on K 2 B 4O 7,Li 2CO 3 and Li 2 B 4O 7.Solubilities and properties (density, conductivity and pH value) of solutions in the quaternary system Li +,K +//CO 2- 3,B 4O 2- 7-H 2O at 288 K were experimentally studied with the isothermal equilibrium method. The phase diagram of the system consisted of two invariant points E and F, five univariant curves, and four crystallization fields that belonged to K 2CO 3·3/2H 2O,Li 2 B 4O 7·3H 2O, K 2 B 4O 7 ·4H 2O and Li 2CO 3. The composition of the solution correspon...

关 键 词：水盐体系 相平衡 硼酸盐 碳酸盐 四元体系 LI^+ K^+ CO3^2- B4O7^2 H2O 

分 类 号：O642.42[理学—物理化学]