| abstract |
The present invention relates to (a) one or more sources of ions of tetravalent elements, one or more sources of alkali metal hydroxides, one or more directing-agents (R), water and optionally one or more sources of ions of trivalent elements. Providing a mixture comprising a; (b) treating the mixture for less than 72 hours at crystallization conditions comprising a temperature of about 160 to about 250 ° C. to produce a treated mixture having molecular sieves; And (c) recovering the molecular sieve, wherein the mixture is Y: X 2 = 10 to infinity, H 2 O: Y = 1 to 20, OH − : Y = 0.001 to 2, M + : Y = 0.001 to 2, R: Y = 0.001 to 0.34 (wherein Y is a tetravalent element, X is a trivalent element and M is an alkali metal), a method for producing an MCM-22 molecular sieve It is about. |