Numerical and experimental study of ion exchange in porcelain tiles

Author(s):  
Marcelo Dal Bó ◽  
Maykon Cargnin ◽  
Bruna Nascimento de Souza ◽  
Wenceslau Fernandes das Neves ◽  
Márcio Celso Fredel ◽  
...  
2014 ◽  
Vol 118 (9) ◽  
pp. 2396-2404 ◽  
Author(s):  
G. De Luca ◽  
F. Bisignano ◽  
A. Figoli ◽  
F. Galiano ◽  
E. Furia ◽  
...  

2014 ◽  
Vol 535 ◽  
pp. 692-700
Author(s):  
Xiao Ge ◽  
Ying Xu ◽  
Bin Dong ◽  
Zu Wen Liu

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.


1975 ◽  
Vol 40 (312) ◽  
pp. 377-384 ◽  
Author(s):  
Alok K. Gupta ◽  
Alan D. Edgar

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.


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

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