IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ammonia with Phosphoric acid, Hydrogen chloride, Potassium oxide and Water

Components:
   (1) Ammonia; NH3; [7664-41-7]  NIST Chemistry WebBook for detail
   (2) Hydrogen chloride; HCl; [7647-01-0]  NIST Chemistry WebBook for detail
   (3) Phosphoric acid; H3PO4; [7664-38-2]  NIST Chemistry WebBook for detail
   (4) Potassium oxide; K2O; [12136-45-7]  NIST Chemistry WebBook for detail
   (5) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Baranova, T.N.; Semkin, N.T.; Kim, P.P.; Kornishina, E.N.; Nikandrov, I.S., Tekhnologiya Mineral'nykh Udobreniy (Leningrad) 1977, 55.

Variables:

   Concentration = Composition at 20 ºC and 80 ºC.

Prepared By:
   L.V. Chernykh and J. Eysseltová

Experimental Remarks:

   Remarks: The authors present their data in the following form. Compiler's Remark: Recalculation of the data to other coordinates is impossible due to lack of data about the chloride contents in the saturated solutions.

Experimental Data:   (Notes on the Nomenclature)

Solubility isotherms in the NH₄H₂PO₄-H₃PO₄-KCl-H₂O system.
Solution number	t/°C	Chemical₁	10² * Mass Fraction w₁	Chemical₂	10² * Mass Fraction w₂	Chemical₃	10² * Mass Fraction w₃	Solid Phase(s)
1	20	K2O	10.22	NH3	2.20	P2O5	16.23	KH2PO4
2	20	K2O	7.40	NH3	2.30	P2O5	15.94	(K,NH4)H2PO4
3	20	K2O	4.59	NH3	3.14	P2O5	17.26	"
4	20	K2O	2.06	NH3	3.64	P2O5	18.61	"
5	20	K2O	1.95	NH3	3.51	P2O5	17.17	"
6	20	K2O	8.00	NH3	2.04	P2O5	31.44	"
7	20	K2O	7.46	NH3	2.45	P2O5	26.76	"
8	20	K2O	6.32	NH3	2.50	P2O5	29.83	"
9	20	K2O	4.61	NH3	3.64	P2O5	31.26	"
10	20	K2O	1.77	NH3	4.15	P2O5	30.50	"
11	20	K2O	6.80	NH3	2.04	P2O5	53.80	KH2PO4
12	20	K2O	5.51	NH3	2.62	P2O5	51.78	(K,NH4)H2PO4
13	20	K2O	4.71	NH3	3.03	P2O5	51.10	"
14	20	K2O	3.10	NH3	3.70	P2O5	50.98	"
15	20	K2O	1.70	NH3	4.98	P2O5	52.85	NH4H2PO4
16	80	K2O	12.68	NH3	0.78	P2O5	26.82	KCl
17	80	K2O	12.42	NH3	1.50	P2O5	28.72	"
18	80	K2O	11.15	NH3	2.64	P2O5	29.93	"
19	80	K2O	9.15	NH3	5.04	P2O5	26.90	(NH4,K)H2PO4
20	80	K2O	8.49	NH3	5.59	P2O5	26.09	"
21	80	K2O	5.53	NH3	5.90	P2O5	30.29	"
22	80	K2O	4.18	NH3	6.31	P2O5	29.70	(NH4,K)H2PO4
23	80	K2O	2.83	NH3	6.28	P2O5	29.76	"
24	80	K2O	11.08	NH3	0.84	P2O5	35.60	KCl
25	80	K2O	10.39	NH3	4.56	P2O5	34.26	"
26	80	K2O	8.98	NH3	4.80	P2O5	34.08	(NH4,K)H2PO4
27	80	K2O	7.75	NH3	3.62	P2O5	35.00	"
28	80	K2O	5.83	NH3	6.07	P2O5	34.62	"
29	80	K2O	3.15	NH3	6.61	P2O5	36.42	"
30	80	K2O	1.92	NH3	6.68	P2O5	32.40	NH4H2PO4
31	80	K2O	0.74	NH3	7.10	P2O5	35.75	"
32	80	K2O	0.35	NH3	7.22	P2O5	34.65	"
33	80	K2O	9.53	NH3	0.87	P2O5	39.45	KCl
34	80	K2O	9.50	NH3	1.47	P2O5	37.11	"
35	80	K2O	9.17	NH3	1.54	P2O5	42.10	"
36	80	K2O	8.80	NH3	2.68	P2O5	42.60	"
37	80	K2O	7.64	NH3	4.36	P2O5	42.15	"
38	80	K2O	5.00	NH3	5.10	P2O5	40.10	(K,NH4)H2PO4
39	80	K2O	4.30	NH3	6.18	P2O5	39.80	"
40	80	K2O	1.50	NH3	6.58	P2O5	38.31	NH4H2PO4
41	80	K2O	0.80	NH3	7.22	P2O5	42.65	"
42	80	K2O	0.23	NH3	7.02	P2O5	41.45	"
43	80	K2O	9.28	NH3	0.65	P2O5	44.16	KCl
44	80	K2O	8.30	NH3	2.80	P2O5	44.90	"
45	80	K2O	7.71	NH3	5.05	P2O5	44.33	"
46	80	K2O	7.68	NH3	4.60	P2O5	44.48	"
47	80	K2O	4.32	NH3	6.07	P2O5	43.78	(K,NH4)H2PO4
48	80	K2O	0.74	NH3	7.22	P2O5	44.01	NH4H2PO4
49	80	K2O	0.67	NH3	7.32	P2O5	45.67	"
50	80	K2O	0.49	NH3	7.70	P2O5	45.79	"

Method/Apparatus/Procedure:
   The only information given is that the solutions were analyzed for P₂O₅, K₂O, NH₃ and Cl^–. The composition of the solid phase was determined by chemical analysis, petrographically and with the aid of IR spectroscopy.

Source and Purity of Materials:
   No information is given.

Estimated Errors:
   Solubility: No information is given.
   Temperature: No information is given.