| Budget Amount *help |
¥14,800,000 (Direct Cost: ¥14,800,000)
Fiscal Year 2003: ¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 2002: ¥10,500,000 (Direct Cost: ¥10,500,000)
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| Research Abstract |
Synthesis of aluminomethylphosphonate membranes on a porous alumina substrate was attempted by using a hydrothermal method and steam-assisted conversion method. When pseudo-boehmite, methylphosphonic acid, water and t-butyl alcohol were mixed, part of the mixture solution was sucked into the substrate, and the substrate was dipped in the solution, followed by hydrothermal treatment in an autoclave at 160℃, AlMepO-β was crystallized to form a membrane-like aggregates on the substrate probably as a result of composite formation inside the substrate. When the -same mixture solution was sucked into the substrate, and the substrate was dried, followed by steaming in an autoclave, AlMepO-α membrane 40μm thick was obtained where crystallites were grown so as to closely contact on and in the substrate. However, the single gas permeation experiments of oxygen, air and hydrogen gas revealed negligible differences in permeance between the membranes and the substrate alone.
Synthesis of organozeolites composed of metals and a phosphonate with a bulky group was investigated. Although it was not possible to obtain a nanoporous compound that can adsorb nitrogen, several compounds prepared had long-range order deilved from t-butylphosphonate. Especially, a Zn/t-butylphosphonate/methylphosphonate system gave a product with an XRD reflection at d=25Å, in which both the phosphonates are incorporated in the framework, when trioxane was added. Also organozeolites composed of nitrilotrisphosphonate and alumimum were attempted to prepare. The product obtained when trioxane was added seemed to possess a three-dimensional framework though there is no nanopore that can adsorb nitrogen.
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