The distribution of traces during the crystallization of barium chloride

• Autorzy: Korolewicz T. , Wójcik J.
• Języki publikacji: EN

Abstrakty

EN

The paper deals with investigations on the distribution of trace amounts of sodium, potassium, calcium and strontium ions in the course of the fractionated precipitation of barium ions from a solution of barium chloride by means of hydrochloric acid. The effects of this operation were determined by making use of the method of radioactive traces applying isotopes of( 24)Na, (42)K, 45Ca and 85Sr. The percentage of trace elements co-precipitated with the sediment of barium chloride is only slight. After the precipitation of about 70% of the matrix, within the investigated range of concentrations of the traces 1 x 10(-4)-1 x 10(-3) % recalculated into solid BaCl(2), there are 99% of the initial amount of sodium, 95-98% potassium, 95-99.5% calcium, 94-96% strontium. Investigated was also the distribution of Cd(II), Co(II), Cu(II), Fe(III), Mn(II), Ni(II), Pb(II), T1(I) and Zn(II) in the course of a single separation of BaCl2 by means of hydrochloric acid. The trace amounts of heavy metals were analysed by means of the AAS-method. After the precipitation of about 70% of the matrix, within the investigated range of concentrations of the traces 5xlO(-5)-5x1O(-3) % most of the trace elements are contained in the solution. Only lead ions co-precipitate in such conditions with the sediment of barium chloride. The obtained results have made it possible to apply the operation described above as one of the stages of purification in the course of winning and analysing spectrally pure BaCl(2).

Słowa kluczowe

EN

crystallization; barium chloride; impurities; distribution coefficient

PL

krystalizacja; chlorek baru; zanieczyszczenia; współczynnik podziału

• Wydawca: Centrum Materiałów Polimerowych i Węglowych PAN
• Czasopismo: Polish Journal of Applied Chemistry
• Rocznik: 2000
• Tom: Vol. 44, nr 2-3
• Strony: 159--166
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Korolewicz T.

• lnstitute of Chemistry, Inorganic Technology and Electrochernistry, Silesian Technical University, 44-100 Gliwice, Poland

autor

Wójcik J.

• Institute of Chemical and Process Engineering, Silesian Technical University, 44-100 Gliwice, Poland

Bibliografia

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• [4] T.G. ACHMETOV, Chim. Prom., S. 613 (1972).
• [5] T. KOROLEWICZ and I. WÓJCIK, "The distribution of impurities during the crystallization of barium nitrate", 13th Symposium on Industrial Crystallization, Toulouse, Vol. 1, P-S43, 337-343 (1996).
• [6] T. KOROLEWICZ and D. MAZOŃSKA, Zesz. Nauk. Pol. Śl. Chemia, 119, 57-60 (1988).
• [7] K. AKERMAN, Technical applying of the method of marked atoms, PWN, Warsaw (1970) (in Polish).
• [8] L.G. SILLEN and A.E. MARTELL, Stability Constants of Material-Ion Complexes, The Chemical Society, London (1964).
• [9] L. GORDON, M. SALUTSKY and H,H, WILLARD, "Precipitation from homogeneous solution", J. Wiley, N. York, (1959).