Published February 2000
| Version v1
Journal article
Mechanism of the ion exchange of polynuclear molybdates
Description
Parameters of aminoexchange extraction of mono- and polynuclear forms of oximolybdates are determined. Primarily one mononuclear and three polynuclear forms heptamolybdate-ion are extracted from diluted solutions. Energies and mole heats of the molybdate ion exchange extraction for chlorine-ion (ΔGex0, ΔHex): HMoO4- (-4.65, ...), Y2Mo7O244- (-96, 48), H3Mo7O243- (-115, -40), H4Mo7O242- (-121, -58) are calculated. Thermochemical measurements confirm, that the extraction of multicharge ions, is energetically unprofitable. Protonized ion forms are extracted in most cases
Abstract (Russian)
Определены параметры анионообменной экстракции моно- и полиядерных форм оксимолибдатов. Из разбавленных растворов экстрагируются преимущественно одна моноядерная и три полиядерные формы гептамолибдат-иона. Вычислены энергии и мольные теплоты обменной экстракции ионов молибдата на хлор-ион (ΔGex0, ΔHex): HMoO4- (-4.65, ...), Y2Mo7O244- (-96, 48), H3Mo7O243- (-115, -40), H4Mo7O242- (-121, -58). Термохимические изменения подтверждают, что экстракция монозарядных ионов энергетически невыгодна. В большинстве случаев экстрагируются протонированные формы ионовAdditional details
Additional titles
- Original title (Russian)
- Механизм ионообменной экстракции полиядерных молибдатов
Publishing Information
- Journal Title
- Zhurnal Neorganicheskoj Khimii
- Journal Volume
- 45
- Journal Issue
- 2
- Journal Page Range
- p. 363-368
- ISSN
- 0044-457X
- CODEN
- ZNOKAQ
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- Russian Federation
- INIS RN
- 31035822
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- AQUEOUS SOLUTIONS; CHEMICAL REACTION KINETICS; COMPLEXES; CONCENTRATION RATIO; DISTRIBUTION FUNCTIONS; ENTHALPY; ION EXCHANGE; MOLYBDATES; PH VALUE; POLYMERIZATION; QUATERNARY COMPOUNDS; SOLVENT EXTRACTION
- Descriptors DEC
- AMINES; AMMONIUM COMPOUNDS; CHEMICAL REACTIONS; DISPERSIONS; EXTRACTION; FUNCTIONS; KINETICS; MIXTURES; MOLYBDENUM COMPOUNDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REACTION KINETICS; REFRACTORY METAL COMPOUNDS; SEPARATION PROCESSES; SOLUTIONS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- 16 refs., 2 figs., 2 tabs.