| 摘要 |
The synthetic porous crystalline material, MCM-56, is synthesized by a process comprising the steps of: a) preparing a reaction mixture containing sources of alkali or alkaline earth metal (M) cation, an oxide of an trivalent element X, an oxide of a tetravalent element Y containing at least 30 wt. % of solid YO2, a directing agent (R), and water, said reaction mixture having a composition, in terms of mole ratios of oxides, within the following ranges: YO2/X2O3 5 to 35 H2O/YO2 10 to 70 OH-/YO2 0.05 to 0.5 M/YO2 0.05 to 3.0 R/YO2 0.1 to 1.0 b) crystallizing said mixture at a temperature of about 80 DEG C. to about 225 DEG C., preferably about 125 DEG C. to about 140 DEG C., to form crystals of MCM-56, c) terminating said crystallization prior to the formation of a significant quantity of MCM-49, and d) separating the MCM-56 crystals from the reaction mixture.
|
