Results 111 to 120 of about 288 (145)

Temperature effects on the thermodynamic parameters of sorption of germanium on an anionite

Russian Journal of Physical Chemistry A, 2008
The isotherms of sorption of GeO 3 2− on a synthetic sorbent were obtained at various temperatures. A thermodynamic description of the sorption isotherms by an analogue of the Langmuir equation was suggested.
D. E. Chirkst, O. V. Cheremisina, A. A. Chistyakov   +2 more
openaire   +1 more source

Sorptive separation of yttrium and cerium on a weakly basic anionite

Russian Journal of Physical Chemistry A, 2014
The sorption of complex yttrium ions with Trilon B onto the weakly basic anionite D-403 in nitrate form from an acidic medium at pH 3 with constant ionic strength (NaNO3, 1 mol/kg) is investigated. A thermodynamic evaluation of the sorption isotherm of anionic yttrium complexes is performed using a method based on the linearization of the equation of ...
O. V. Cheremisina, M. A. Ponomareva, D. E. Chirkst, O. L. Lobacheva, I. A. Shul’gin   +4 more
openaire   +1 more source

Tantalum sorption from chloride-fluoride solutions by anionites

Russian Journal of Non-Ferrous Metals, 2007
The calculated and experimental data on sorption of tantalum ions from chloride-fluoride solutions by anionites of various classes and structures are considered and discussed. Based on the calculations carried out, it is shown that, in chloride-fluoride solutions, tantalum forms a whole series of complex ions, namely, chloride, fluoride, hydroxy, and ...
V. N. Rychkov, L. V. Norkina
openaire   +1 more source

[Kinetic sorption of nicotinic acid by anionites].

Prikladnaia biokhimiia i mikrobiologiia, 1976
Studies of the kinetic sorption of nicotinic acid have demonstrated that the ionites AH-22, AH-31 and IR-45 absorb it quantitatively from water solutions. The static exchange capacity of nicotinic acid makes 3.5 mmole/g for AH-22 and IR-45 and 2.0 mmole/g for AH-31 and remains unchanged after ionite sterilization.
V D, Novosyolova, I B, Romanova, L A, Golovlyova   +2 more
openaire   +1 more source

Sulfur dioxide adsorption in a fixed bed of a synthetic anionite

Theoretical Foundations of Chemical Engineering, 2000
Fixed beds of synthetic anionites were used to remove SO2 from exhaust gas. The process suggested includes the reactivation of the sorbent with sodium sulphite. Average SO2 removal efficiency and adsorption capacity were determined for a number of commercial anionites.
Kh. Boyadzhiev, L. Pantofchieva, I. Khristov   +2 more
openaire   +1 more source

Unusual processes on anionites

Research – Innovation – Innovative Entrepreneurship: International Scientific Congress, 3nd edition, June 7-8, 2025. Vol. 1
Cross-linked ionogenic polymers containing weakly basic or strongly basic groups, which are a large-tonnage product of the chemical industry, are used in a number of areas of science and technology as anion exchangers. The work shows that weakly basic anions, in addition to their main property of retaining anions from solution, can also retain metal ...
openaire   +1 more source

Hydration of strongly basic anionites: Ab initio calculations

Polymer Science Series B, 2007
For the hydration of isolated and adjacent functional groups of strongly basic anionites, ab initio quantum-chemical calculations have been performed via the molecular fragment method. As counterions, OH−, F−, Cl−, Br−, and I− ions have been tested. It has been shown that Cl−, Br−, and I− ions are strongly bonded to the functional groups. The hydration
V. M. Zelenkovskii, T. V. Bez”yazychnaya, V. S. Soldatov   +2 more
openaire   +1 more source

RADIATION-RESISTANT ANIONITES FROM OIL RESIDUE

Petroleum Science and Technology, 1999
ABSTRACT The author describes the optimization of the process of producing high-and low-basic anionites of a new type on the basis of a concentrated oil residue. The exchange capacitance of the anionites is 1.78-4.50 mg-eq/g, they have satisfactory dynamic exchange capacitance, a relative rate of ion exchange and mechanical strength of 80-93%.
openaire   +1 more source

Kinetics of isonicotinenitrile catalytic hydration on AV-17-8 anionite

Reaction Kinetics and Catalysis Letters, 1985
The dependence of the rate constant on the temperature, catalyst and nitrile quantity and OH-group concentration has been established. The reaction is first order with respect to both nitrile and catalyst. A probable reaction mechanism is suggested.
K. Kh. Dzhumakaev, G. T. Fedolyak, A. D. Kagarlitskii, Ya. A. Dorfman, V. S. Emeliyanova   +4 more
openaire   +1 more source

One-Component eluents for chromatofocusing in weakly basic anionite columns

Russian Journal of Physical Chemistry, 2006
Descending pH gradients inside anion-exchange columns packed with Silochrom S-120 with grafted ethylenediamine and diethylenetriamine groups were obtained for the first time with the use of one-component eluents. The smoothest quasi-linear gradients were observed for eluents on the basis of citric and 6-aminohexane acids.
A. V. Ivanov, S. S. Kubyshev
openaire   +1 more source