Presentation is loading. Please wait.

Presentation is loading. Please wait.

5.5 Phase diagrams of three-component systems ---ternary phase diagrams ( ) T or ( ) P ( ) T,P.

Similar presentations


Presentation on theme: "5.5 Phase diagrams of three-component systems ---ternary phase diagrams ( ) T or ( ) P ( ) T,P."— Presentation transcript:

1 5.5 Phase diagrams of three-component systems ---ternary phase diagrams ( ) T or ( ) P ( ) T,P

2 The Gibbs Triangle Equilateral triangle coordinates

3 a'a' b'b' c'c' O, content point Content of A in the system Content of B in the system Content of A in the system Mass fraction

4 22%B, 36%C, 42%A

5 5.5.1 Composition characters for equilateral triangle coordinates d,e,f the mass fractions of A are equal Points on AD line, On line AD, D’ is closer to A than D, the mass fraction of A in D’ is more than that in D

6 The level rule for three-component systems D+EO O must be on the line DE Tie line

7 Sb S b The mass fraction of A decrease, m A of A is separated from S (Φ=2, L+A) m A of A is added into the system

8 Centre-of-gravity rule of three-components system D + E + FH

9 5.5.2 Partly miscible three-components liquid system a1-a4, b1-b4, a1-b1, a2-b2,a3-b3….. conjugate solution O: isothermal consolute point aob: binoal curve

10 B: H2O:Butanol:CH3COOH=30%:30%:40%=A+C A: 43%:22%:35% C: 14%:63%:23% A:C = 23:18

11 T - x 1 , x 2 Two phase Single phase There are one couple of partly miscible components

12 Two couples of partly miscible components Vinyl cyanide(A) water(B) ethanol(C) Two-phase Single phase

13 Two-phase Single phase L1 Single phase L2

14 There are three couples of partly miscible components Vinyl cyanide(A) water(B) ether(C) Single phase Two-phase

15 Φ=1 Φ=3 D,E, F

16 Separation of liquid mixtures by extraction

17 Extraction Column

18 5.5.3 Ternary water-salts systems Φ=1 L Φ=2 B(s), L Φ=2 C(s), L Φ=3, B(s), C(s), F Φ=3, the saturation solution of B and C

19 How to get pure B from mixtures of B and C Q-----R(L+B)

20 T=298K T=373K Effect of temperature on phase diagram

21 Purification of salt X(KNO 3 +NaNO 3 )…..D(298K)+KNO 3 …D(373K)…

22 X’: W……D‘……y……D

23 5.5.4 Three-component system containing three binary eutectic points

24 T-x

25 Pb-Sn-Bi trinary system Φ=1, L Φ=2, L+Pb Φ=2, L+Sn Φ=2, L+Bi Triple point Bi/Sn, Sn/Pb, Pb/Bi

26 Φ=3, L+Bi(S)+Sn(S) Eutectic T decrease E4, L+Bi(S)+Sn(S)+Pb(S) Φ=3, L+Pb(S)+Sn(S)

27 T decrease: A(Φ=1,L)… L+Bi(S) L+Bi(S)+Sn(S) L+Bi(S)+Sn(S)+Pb(S) Φ=4, f=0

28 The composition variation path

29 5.6 The surfactant/oil/water trinary system

30 Homework Y: P188 39 Review the whole chapter


Download ppt "5.5 Phase diagrams of three-component systems ---ternary phase diagrams ( ) T or ( ) P ( ) T,P."

Similar presentations


Ads by Google