Experimental study of copper–alkali ion exchange in glass

1998 ◽  
Vol 83 (3) ◽  
pp. 1200-1206 ◽  
Author(s):  
F. Gonella ◽  
F. Caccavale ◽  
L. D. Bogomolova ◽  
F. D’Acapito ◽  
A. Quaranta
Keyword(s):  
Experimental Study ◽  
Ion Exchange ◽  
Alkali Ion

Leucite-Na-feldspar incompatibility: an experimental study

1975 ◽  
Vol 40 (312) ◽  
pp. 377-384 ◽  
Author(s):  
Alok K. Gupta ◽  
Alan D. Edgar
Keyword(s):  
Experimental Study ◽  
Ion Exchange ◽  
High Temperatures ◽  
Atmospheric Pressure ◽  
Alkali Feldspar ◽  
Phase Relations ◽  
Alkali Feldspars ◽  
Alkali Ion

SummaryPhase relations at atmospheric pressure in the pseudobinary join KAlSi2O6 (Lc)-NaAlSi3O8(Ab) and in the pseudoternary join Lc-Ab-CaAl2Si2O8(An) indicate that leucite is in-compatible with Na-feldspar. In the former join leucite can exist with an alkali feldspar of maximum albite content Ab54. In the Lc-Ab-An join, leucite only coexists with ternary feldspars with high An contents (approximately An50). Under PH2O conditions leucites may only coexist with alkali feldspars even poorer in Ab than those found at atmospheric pressure. Rare occurrences of coexisting leucite and Na-feldspar in nature have probably not crystallized directly from a melt but may have formed by a process of alkali ion exchange; or they may be unstable assemblages. No support can be found for the suggestions based on thermochemical calculations that albite and leucite are compatible at high temperatures.

Bromide Ion Exchange with a Keggin Polyoxometalate on Functionalized Polymeric Membranes: A Theoretical and Experimental Study

2014 ◽  
Vol 118 (9) ◽  
pp. 2396-2404 ◽  
Author(s):  
G. De Luca ◽  
F. Bisignano ◽  
A. Figoli ◽  
F. Galiano ◽  
E. Furia ◽  
...  
Keyword(s):  
Experimental Study ◽  
Ion Exchange ◽  
Polymeric Membranes ◽  
Bromide Ion ◽  
Keggin Polyoxometalate

Kinetics of alkali ion exchange of irradiated glasses

2003 ◽  
Vol 792 ◽  
Author(s):  
Michael I. Ojovan ◽  
William E. Lee
Keyword(s):  
Ion Exchange ◽  
External Irradiation ◽  
Glass Temperature ◽  
Ion Exchange Kinetics ◽  
Radiation Induced ◽  
Exchange Kinetics ◽  
Induced Changes ◽  
Kinetics Of ◽  
Alkali Ion

ABSTRACTThe kinetics of alkali ion exchange of irradiated glasses were investigated using the structural energy barrier model for ion exchange of glasses. Derived rates of alkali ion exchange depend both on irradiation dose D(Gy) and dose rate q(Gy/s) illustrating that some effects cannot be simulated by external irradiation and require in-situ measurements. Higher D and q lead to increased ion exchange rates. Significant changes occur in the activation energies demonstrating a 4 – 6 times decrease depending on glass composition. Radiation-induced changes are higher at relatively low temperatures and are diminished by increased glass temperature. Numerical estimations show that changes in alkali ion exchange kinetics occur at D far below damaging doses.

Experimental Study on Softening Treatment of Weak Acid Hydrogen Type Resin to Viscous Oil Sewage

2014 ◽  
Vol 535 ◽  
pp. 692-700
Author(s):  
Xiao Ge ◽  
Ying Xu ◽  
Bin Dong ◽  
Zu Wen Liu
Keyword(s):  
Experimental Study ◽  
Ion Exchange ◽  
Ph Value ◽  
Weak Acid ◽  
Production Plant ◽  
Test Results ◽  
Softening Effect ◽  
Exchange Column ◽  
Viscous Oil ◽  
Softened Water

This essay presents an experimental study about softening effect of weak acid hydrogen type resin on viscous oil sewage of an oil production plant through ion exchange technique, and the test results show that: when the first level of ion exchange column adopts weak acid hydrogen type resin and the second level adopts weak acid sodium type resin, pH value of final effluent is 6.7~7.0, and average hardness is 0.02 mg·L-1; when the first-level resin is invalid and regenerated, with washing for 12h at the flow rate of 10BV/H by softened water after acid feeding, about 50% of the weak acid hydrogen type resin is transformed into sodium type, and after being put into operation, the pH value the hardness and other indexes of the first-level and second-level effluent conform to national requirements. It is thus clear that: compared with the traditional process of the first-level exchange column adopting the weak acid sodium type resin, the first-level exchange column adopting the weak acid hydrogen type resin has better softening effect on viscous oil sewage, reduces alkali transformation steps during regeneration, and reduces alkali cost and environmental pollution.

scholarly journals Communication: First-principles evaluation of alkali ion adsorption and ion exchange in pure silica LTA zeolite

2018 ◽  
Vol 149 (13) ◽  
pp. 131102 ◽  
Author(s):  
Vancho Kocevski ◽  
Benjamin D. Zeidman ◽  
Charles H. Henager ◽  
Theodore M. Besmann
Keyword(s):  
Ion Exchange ◽  
First Principles ◽  
Ion Adsorption ◽  
Pure Silica ◽  
Lta Zeolite ◽  
Alkali Ion

Alkali ion exchange reactions with RbA1SiO4: A new metastable polymorph of KA1SiO4

1978 ◽  
Vol 13 (6) ◽  
pp. 575-581 ◽  
Author(s):  
D.B. Minor ◽  
R.S. Roth ◽  
W.S. Brower ◽  
C.L. McDaniel
Keyword(s):  
Ion Exchange ◽  
Exchange Reactions ◽  
Alkali Ion
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