Ion-Exchange and Spectrophotometric Investigation of Iron(III) Sulfate Complex Ions

1953 ◽  
Vol 75 (13) ◽  
pp. 3081-3085 ◽  
Author(s):  
Roy A. Whiteker ◽  
Norman Davidson
Keyword(s):  
Ion Exchange ◽  
Spectrophotometric Investigation ◽  
Complex Ions ◽  
Sulfate Complex

Geometrische Isomerie bei bindungsisomeren Hexakis(thiocyanatoisothiocyanato)osmaten(III) / Geometrie Isomerism of Bond Isomerie Hexakis(thiocyanatoisothiocyanato)osmates (III)

1980 ◽  
Vol 35 (8) ◽  
pp. 994-999 ◽  
Author(s):  
G. Peters ◽  
W. Preetz
Keyword(s):  
Ion Exchange ◽  
Raman Spectra ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Geometric Isomers ◽  
Complex Ions ◽  
Diethylaminoethyl Cellulose ◽  
Ir And Raman ◽  
Bond Isomers ◽  
Reflux Temperature

Abstract From the system of isomeric complex ions [Os(NCS)n(SCN)6-n]3-, 9 of 10 possible species, n = 1-6, are isolated, including for n = 2, 3, 4 the first representatives of pure geometric bond isomers. By reaction of K2[OsCl6] with aqueous KSCN solution at reflux temperature, trans(mer)-complexes, and on treatment at 60 °C exclusively cis(fac)- complexes are formed. By ion exchange chromatography on diethylaminoethyl-cellulose columns, from mixtures of pairs of geometric isomers the pure trans(mer)-compounds are enriched in front, the cis(fac)-species at the end of the zones. Characterization and assignment of the configuration of the geometric isomers is based upon the reproducible differences in the IR and Raman spectra.

On the ion exchange sorption of some complex cations and their nature of interaction with chromium ferrocyanide gel

1980 ◽  
Vol 58 (21) ◽  
pp. 2250-2254 ◽  
Author(s):  
Ishwari P. Saraswat ◽  
Suresh K. Srivastava ◽  
Surendra K. Verma ◽  
Ashok K. Sharma
Keyword(s):  
Magnetic Susceptibility ◽  
Ion Exchange ◽  
Exchange Process ◽  
Gel Formation ◽  
Complex Ions ◽  
Ammine Complex ◽  
Ion Exchange Process ◽  
Bivalent Cations ◽  
The Matrix ◽  
Static Conditions

The sorption of ammine complex cations of Co(III), viz. [Co(NH3)6]3+ and [Co(en)3]3+, on the H+ form of chromium ferrocyanide gel has been studied under static conditions. It is observed that the majority of these complex cations (90%) are sorbed by ion-exchange process. The extent of desorption of these complex ions with some uni- and bivalent cations is in the order K+ > NH4+ > Ba2+ > Sr2+ > Ca2+ > Mg2+.Infrared, Mössbauer, and magnetic susceptibility studies on the air-dried and powdered gel in H+ form and loaded with [Co(NH3)6]3+, [Co(en)3]3+, Fe3+, and La3+ ions show that prussiate compounds are not formed during the gel formation and the sorbed cations are held by the electrostatic attraction forces in the matrix, which is strained by the sorption of the big cations.

THE EXCHANGE OF IODINE BETWEEN INORGANIC IODIDES AND n-BUTYL IODIDE

1951 ◽  
Vol 29 (1) ◽  
pp. 60-69 ◽  
Author(s):  
G. W. Hodgson ◽  
H. G. V. Evans ◽  
C. A. Winkler
Keyword(s):  
Ion Exchange ◽  
Inorganic Salt ◽  
Activation Energies ◽  
Acetonitrile Solution ◽  
Exchange Reactions ◽  
Complex Ions ◽  
Iodide Ion

Lithium, sodium, and caesium iodides are highly ionized in acetonitrile solution and have practically the same rates and activation energies (18 kcal. per mole) for their exchange reactions with n-butyl iodide in this solvent. There seems little doubt, therefore, that these exchange reactions occur between the organic iodide and iodide ion derived from the inorganic salt. Zinc and cadmium iodides, and iodine, are only slightly ionized in acetonitrile and exchange with n-butyl iodide with rates that are widely different from one another and from the rate of iodide ion exchange. The activation energies are 21.9, 20.6, and 17.5 kcal. per mole respectively. It is concluded that these exchange reactions involve predominantly complex ions.

scholarly journals Thermodynamics of the Neptunium(IV) Sulfate Complex Ions

1954 ◽  
Vol 76 (23) ◽  
pp. 5931-5934 ◽  
Author(s):  
J. C. Sullivan ◽  
J. C. Hindman
Keyword(s):  
Complex Ions ◽  
Sulfate Complex

Corrosion Resistance of E-Glass Fiber in Simulated Oilfield Environment

2012 ◽  
Vol 217-219 ◽  
pp. 15-19
Author(s):  
Hou Bu Li ◽  
Dong Tao Qi ◽  
Shui Hui Zhang ◽  
Nan Ding ◽  
Xue Hua Cai
Keyword(s):  
Corrosion Resistance ◽  
Ion Exchange ◽  
Glass Fiber ◽  
Elemental Analysis ◽  
Acidic Medium ◽  
Corrosion Test ◽  
Glass Network ◽  
Fiber Surface ◽  
Complex Ions ◽  
Ft Ir

Corrosion behavior and mechanism of E-glass fiber in simulated oilfield environment including CO2, H2S and Cl- were firstly studied. After simulated corrosion test, morphology of E-glass fiber was gathered using SEM. Chemical bonding status and elemental analysis were systematically investigated by XPS, FT-IR and EDS. The results revealed that corrosion of E-glass fiber in simulated oilfield acidic medium was primarily attributed to ion exchange mechanism, which was not only controlled by acid concentration, but also dominated by formation of complex ions or insoluble salts. The depletion of cations on E-glass fiber surface can disrupt the continuity of glass network, therefore reducing the strength of fiber.

Sign in / Sign up

Export Citation Format

Share Document