Mobil Oil Corporation

Sean C Emerson

Wieslaw J Roth

Donald J Klocke

Stephen L Lawton

Shiu Lun Fung

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 YO.sub.2, a directing agent (R), and water, said reaction mixture having a composition, in terms of mole ratios of oxides, within the following ranges:

Process for preparing the synthetic porous crystalline material MCM-56

A method for synthesizing an ultra-large pore crystalline material which can be used as a sorbent or catalyst component for the conversion of organic and inorganic compounds is improved through the addition of an antifoaming agent. The addition of antifoaming agents reduces foaming without interfering with material synthesis. Elimination of foam allows for easier charging of autoclaves and processing of synthesis mixtures.

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Voorhees, NJ, United States of America

Sean C Emerson