Ion-exchange fibers

Slotted plate for catalyst support designed with openings for vapor flow Ion exchanger fibers (reinforced ion exchange polymer) used as solid-acid catalyst None specified Hydrolysis of methyl acetate Evans and Stark, Eiir. Pat. Appl. EP 571,163 (1993) Hirata et al., Jap. Patent 05,212,290 (1993)... 

Key words Ion exchange fiber, bifunctional fiber, sulfonic acid groups, phosphonic acid groups. 

Scheme 1. Ion exchange fibers and resin used in this work.

Greenleaf, J.E., Lin, J.-C. and Sengupta, A.K. (2006) Two novel applications of ion exchange fibers arsenic removal and chemical-free softening of hard water. Environmental Progress, 25(4), 300-11. 

Jaskari T, Vuorio M, Kontturi K, Manzanares JA, Hirvonen J (2001) Ion-exchange fibers and drugs An equilibrium study. J Control Release 70 219-229... 

Ion exchanger fibers (reinforced ion exchange polymer) used Hydrolysis of methyl acetate Hirata et al, Jap. Patent 05,212,290 (1993)... 

Nlshiyama M., On the preparalion of ion exchange fibers containing amino and carboxyl groups and paper therefrom, Kami Pa Oikyoshi, 34, 421, 1980 Chem. Ahstr.. 9.3, 48.365, 1980. 

Kats, B. M., et al. (1998). Exchange of copper, lead, cadmium and manganese ions on carboxylic ion-exchange fiber. Ukrainskii Khimicheskii Zhumal. 64, 1-2, 30-34. 

The suppressor column has to be regenerated periodically. Also, the suppressor column contributes to band spreading and limits the performance of the technique Therrfore, alternatives were developed a few years later (10). Instead of a suppressor column, a hollow ion-exchange fiber can be used. If we are separating cations using a dilute add as mol phase, we should use an anion-exdiange fiber. The anion exchange fiber is immersed in a bath ct a... 

Hanninen, K., Haukonen, A.M., Murtomaki, L., Hirvonen, J., 2007. Mechanistic evaluation of factors affecting compound loading into ion-exchange fibers. European Journal of Pharmaceutical Sciences 31, 306—317. 

Jaskari, T., Vuorio, M., Kontturi, K., Manzanares, J.A., Hirvonen, J., 2001. Ion-exchange fibers and drugs an equilibrium study. Journal of Controlled Release 70, 219—229. 

Industrial applications include ion-exchange fibers, made by treating acrylic fiber with NH2OH and NaOH to produce amidoxime fiber, used for removing uranium from seawater [576,577], and hydrazine-treated acrylic fibers have been used for removal of other heavy metals [578]. Fundamental studies of treatment methods have also appeared in the literature [579,580,581-584]. 

In IC, a device is used (Figure 4) that has two membranes mounted very close together - dimensions of lcm by 15 cm, spaced some 50 pm apart, with a mesh of ion-exchange fibers in this space to deflect the flowing stream on to the membrane walls. On the outsides of the membranes are channels through which the regenerating solution, tetrame-thylammonium hydroxide in our example, flows in the opposite direction to the eluent. 

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