| Ion exchange fiber (IEF) is a kind of novel functional material for adsorption and separation. It has many peculiarities such as big effective surface area and short transit distance, and it can be used in the form of fiber, cloth and unwoven cloth etc. Many new technology processes have been developed from these materials and have been widly used in air purification, environment conservation, biochemistry and hydra- metallurgy.A strong acid IEF and a weakly acid IEF based on Polytetrafluoroethylene (PTFE) were prepared using simultaneous irradiation technique. Decolour from water conta- ining cationic dye and catalysis of esterification by IEF were studied deeply, and the strong acid IEF was also used to catalyze the synthesis of bisphenol A.The results showed that the IEF could adsorb cationic dye quickly from water containing cationic dye, and the influence of the degree of grafting, kinds of IEF, pH and concentrayion of cationic dye on adsorption capcity were discussed. The regener- ation of IEF and the sorption ability of regenerated IEF were also investigated. It also showed that the IEF is ready to regenerate, and can be used repeatedly.The catalysis of strong acidic cation exchange fiber based on PTFE to esterifica- tion was studied.The influences of catalyst amount, the degree of grafting, reacting temperature on the esterification of acetic acid and butyl alcohol was discussed, and the kinetics constants and activation energy were gained. The reacting condition to the reaction of n-Dodecanoic acid with Guerbet alcohol were studied, and the kinetics constants and activation energy were gained. The results showed that strong acidic cation exchange fiber based on PTFE is an active solid catalyzer to esterification and easier to regeneration.The catalysis of strong acidic cation exchange fiber based on PTFE was also used to catalyse the synthesis of bisphenol A. Although the output is low, it is worth doing some research work. |
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