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AssigneeMobil Corporation
InventorsDavid C. Calabro, Jane C. Cheng, Robert A. Crane, Jr., Charles T. Kresge, Sandeep S. Dhingra, Michael A. Steckel, David L. Stern, Simon C. Weston
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This invention relates to a new synthetic porous crystalline material, designated MCM-68, a method and novel polycyclic organic cation for its preparation and its use in catalytic conversion of organic compounds. The new crystalline material exhibits a distinctive X-ray diffraction pattern and has a unique crystal structure which contains at least one channel system, in which each channel is defined by a 12-membered ring of tetrahedrally coordinated atoms, and at least two further, independent channel systems, in each of which each channel is defined by a 10-membered ring of tetrahedrally coordinated atoms, wherein the number of unique 10-membered ring channels is twice the number of 12-membered ring channels.
A synthetic porous crystalline material which contains at least one channel system, in which each channel is defined by a 12-membered ring of tetrahedrally coordinated atoms, and at least two further, independent channel systems, in each of which each channel is defined by a 10-membered ring of tetrahedrally coordinated atoms, wherein the number of unique 10-membered ring channels is twice the number of 12-membered ring channels.
A synthetic porous crystalline material characterized by an X-ray diffraction pattern including d-spacing and relative intensity values substantially as set forth in Table 1 of the specification and having a composition comprising the molar relationship
A method for synthesizing crystalline material exhibiting a characteristic X-ray diffraction pattern including d-spacing and relative intensity values shown in Table 1 which comprises (i) preparing a mixture capable of forming said material, said mixture comprising sources of alkali or alkaline earth metal (M), an oxide of trivalent element (X), an oxide of tetravalent element (Y), water, and directing agent (Q) comprising a dication selected from a N,N,N',N'-tetraalkylbicyclo[2.2.2]oct-7-ene-2,3:5,6-dipyrrolidinium dication and a N,N,N',N'-tetraalkylbicyclo[2.2.2]octane-2,3:5,6-dipyrrolidinium dication, and having a composition, in terms of mole ratios, within the following ranges:
Dependencies are inferred from the claim text.