chemical exchange
1.On the basis of introducing the principles of separating boron10 isotope by chemical exchange distillation, the problem in largescale boron10 production is discussed. Several new donors, including nitromethane, acetone, methyl isobutyl ketone (MIBK) and diisobutyl ketone (DIBK), which have a larger separation factor if used in separation are introduced. The com plexes between these new donors and boron trifluoride (BF 3) are more stable than the donors examined before.
4.The elimination of Ca2+ and Mg2+ from diluted sugar liquor by three kinds of larger pores cation exchange resins was systematically studied. The Amberlite 252 resin was most effective for the elimination of Ca2+ and Mg2+ in diluted sugar liquor among the three larger pores. It was proceeded by chemical transformation and became magnetic anion exchange resin.
5.(2) The low-value polymolybdenum is adsorbed on the resin by chemical force and took on the ion-exchange site, (3) The low-value polymolybdenum adsorption curve has a distinct difference from the molybdate;
6.The chemical composition, phase and structure were investigated by chemical analysis,X ray powder technique and ion-exchange. The curves of elu-tion and adsorption isotherm were given and the effects of different salts, sorption temperature, pH on the adsorption capacity were examed in order to study properties, structure and adsorbing mechanism of the sorbent.
10.Because of the overlap between the fluorescent emissionspectrum of 5,10,15,20-tetraphenylporphine (TPP) and the absorption spectrum ofETH5294 , in this paper , a kind of optical chemical sensors of fluorescenceenhancement for lithium ions were developed on the basis of ion-exchange sensingscheme . The fluorescent agent TPP was incorporated in the plasticized PVCmembrane containing the lipophilic pH-indicator ETH5294 and lithium selectiveneutral ionophore ETH 1810 .. .
