Polycondensation of urea phosphate with sodium salts

• Autorzy: Hoffmann J.
• Języki publikacji: EN

Abstrakty

EN

Dependence on molar ratio of reagents the polycondensation of urea phosphate with sodium carbonate yields sodium tripolyphosphate at a temperature of 135 - 150°C and sodium metaphosphate at a temperature of about 300°C. The optimum reaction time is 90 - 120 minutes. The degree of phosphates condensation in sodium tripolyphosphate is 2.7 - 3.0 whereby the latter has a high calcium sequestering capacity.

Słowa kluczowe

EN

urea phosphate; polycondensation of phosphates; sodium tripolyphosphate; sodium metaphosphate

PL

fosforan mocznika; polikondensacja; trójpolifosforan sodowy; metafosforan sodowy

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2000
• Tom: Vol. 2, nr 2
• Strony: 13--16
• Opis fizyczny: Bibliogr. 14, poz., tab., wykr.

Twórcy

autor

Hoffmann J.

• Institute of Inorganic Technology and Mineral Fertilizers, Faculty of Chemistry, Wroclaw University of Technology, ul. Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland

Bibliografia

• (1) Črsova S.M., Efimova L.V., Zarubina V.A., Lambrikov V.H., Malachova N.N., Cumak V.T., Rastvorimost mikroelementov v zidkich kompleksnych udobrenijach, Chim. Prom., 1980, 9, 542.
• (2) A fresh look at polyphosphate, Fertil. Int., 1995, 243, 43.
• (3) Kočetkov V.N., Issiedovanie po proizvodstvu polifosfatov ammonija na osnove ekstrakcyjnnoj fosfornoj kisloty soderzaščej 50 - 54% P2O5, Chim. Prom., 1994, 2, 94.
• (4) Hodge Ch.A., Boylan D.R., Ammonium potassium polyphosphate fertilizer, Ind. Eng. Chem. Prod. Res. Develop., 1971, 4, 437.
• (5) Sheridan R.C., Mc Cullough J.F., Allen S.E., Preparation and agronomic evaluation of long-chain crystalline ammonium and potassium ammonium polyphosphates, J. Agric. Food Chem., 1979, 3, 612.
• (6) Grzmil B.U., Kic B., Potassium, sodium and calcium polyphosphates with controlled solubility, J. Agric. Food Chem., 1995, 9, 2463.
• (7) Čerenkova G.I., Knubovec R.G., Kavickaja F.A., Pyldme H.E. Strukturnye prevraščenija fosfatov pri kislotnotermiceskoj pererabotke fosforitov, Ž. Neorg. Chim., 1978, 4, 915
• (8) Paćak R, Skokánek M., Thermal study of the solid-state reaction of ammonium sulfate with calcium phosphate, J. Thermal. Anal., 1993, 39, 551.
• (9) Welch A.J., New reaction in phosphate-ore processing, Proceeding 2 International Congress on Phosphate Compounda, Boston, 1980, 363.
• (10) STPP holds up in the wash, Phosph. Potass., 1994, 89, 19.
• (11) Further hacking for STPP, Phosph. Potass., 1995, 199, 14.
• (12) Górecki H., Hoffmann J., Kuzko A., Urea phosphate a feed additive and preservative, Polish Technical Reviev, 1987, 2-3, 22.
• (13) Grenfield S., Clift M., Analytical chemistry of the condensed phosphates, Pergamon Press, Oxford, 1975.
• (14) Jakobi G., Löhr A. Detergents and textile washing, VCH, Weinheim, 1987.