MCM-56 Manufacture

A method for manufacturing synthetic porous crystalline MCM-56 material comprising the steps of:

• a) preparing a first reaction mixture containing sources of alkali or alkaline earth metal (M) cation, an oxide of a trivalent element X, an oxide of a tetravalent element Y, zeolite seed crystals, and water, said first 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 0.20;
• M/YO2=0.05 to 3.0;
• said first reaction mixture further comprising zeolite seed crystals in an amount from greater than or equal to 0.05 wt. % to less than or equal to 5 wt. %, based on the weight of said first reaction mixture;
• b) adding directing agent R to the reaction mixture of step a) to form a second reaction mixture, having said directing agent R in terms of a mole ratio within the following range:
• R/YO2=0.08 to 0.3;
• and
• c) crystallizing said second reaction mixture of step b) under conditions of temperature of from about 90° C. to about 175° C. and a time for less than 90 hours to form a resulting mixture comprising crystals of said MCM-56 material and less than 10 wt. % non-MCM-56 impurity crystals based on the total weight of said MCM-56 crystals in said second reaction mixture, as identified by X-ray diffraction,
• wherein said crystals of said MCM-56 material have an X-ray diffraction pattern as shown in Table 1:
• TABLE 1
• Interplanar d-Spacing
• (Angstroms)
• Relative Intensity
• 12.4 ± 0.2
• vs
• 9.9 ± 0.3
• m
• 6.9 ± 0.1
• w
• 6.4 ± 0.3
• w
• 6.2 ± 0.1
• w
• 3.57 ± 0.07
• m-s
• 3.44 ± 0.07
• vs