| 摘要 |
PROBLEM TO BE SOLVED: To shorten crystallization time, to promote safety in synthesis and to reduce the cost of a reactant by using at least one monoamine as a precursor of a structuring agent such as an alkylated polymethylene α,ω-diammonium derivative in synthesis. SOLUTION: An aqueous mixture of a source of at least one of Si and Ge, preferably a source of Si and a source of at least one element selected from the group consisting of Al, Fe, Ga, B, Ti, V, Zr, Mo, As, Sb, Cr and Mn, preferably a source of Al is crystallized in the presence of a precursor such as trimethylamine or dibromohexane under stirring by heating at 85-250 deg.C under the self-generating pressure of the mixture for a prescribed time. The resultant solid phase is recovered on a filter, washed, dried, fired and subjected to treatment such as ion exchange to obtain the objective EUO structure type zeolite crystals useful as an adsorbent for pollution control, a molecular sieve for separation and various catalysts. |
