TEMPERATURE-DEPENDENT ANIONIC COMPOSITION OF THE H3PO4-CO(NH2)(2)-H2OSYSTEM - EFFECT OF INORGANIC SALTS

Authors
SAMUSKEVICH LN PETROVSKAYA LI LUNEVA NK
Citation
Ln. Samuskevich et al., TEMPERATURE-DEPENDENT ANIONIC COMPOSITION OF THE H3PO4-CO(NH2)(2)-H2OSYSTEM - EFFECT OF INORGANIC SALTS, Inorganic materials, 34(3), 1998, pp. 293-296
Citations number
15
Categorie Soggetti
Material Science
Journal title
Inorganic materials → ACNP
ISSN journal
00201685
Volume
34
Issue
3
Year of publication
1998
Pages
293 - 296
Database
ISI
SICI code
0020-1685(1998)34:3<293:TACOTH>2.0.ZU;2-Q
Abstract
The effect of temperature and additives (zinc(II) and tin(II) salts, N a4P2O7, Na5P3O10) on the anionic composition of the H3PO4-CO(NH2)(2)-H 2O system was studied by paper chromatography. The anionic composition is found to be governed by the kinetic competition between hydrolysis and condensation. The addition of Na4P2O7 or Na5P3O10 ensures high di - and triphosphate contents of the solutions. Tin(II) and zinc(II) cat alyze the hydrolysis of polyphosphates and increase the fraction of sh ort-chain species.