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AssigneeExxonMobil Chemical Patents Inc.
InventorsIvy D. Johnson, Machteld M. Mertens, An Verberckmoes
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A method of making a crystalline molecular sieve of MFS framework type, said method comprising the steps of (a) adding at least one source of ions of tetravalent element (Y), at least one source of ions of trivalent element (X), at least one hydroxide source (OH−), at least one structure-directing-agent (R), at least one seed source (Seed), and water (H2O) to form a mixture having the following mole composition (expressed in term of oxide): YO2:(n)X2O3:(x)OH−:(y)R:(z)H2O+(m)Seed wherein the m is in the range of from about 10 wtppm to about 2 wt. % (based on total weight of the synthesis mixture), the n is in the range of from about 0.005 to 0.05, the x is in the range of from about 0.01 to about 0.3, the y is in the range of from about 0.03 to about 2; and the z is in the range of from about 3 to about 30; and (b) treating said mixture under crystallization conditions to form said crystalline molecular sieve substantially free of non-MFS material, wherein said crystallization conditions comprise a temperature in the range of from about 150° C. to about 250° C., and crystallization time less than 100 hr, the weight hourly throughput is at least 0.001 hr−1.
A method of making a crystalline molecular sieve of MFS framework type, said method comprising the steps of:
A process of manufacturing crystalline molecular sieve of MFS framework type, said method comprising the steps of:
A crystalline molecular sieve of MFS framework type manufactured by the process comprising the steps of:
Dependencies are inferred from the claim text.
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Of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65: mFS-type, e.g. ZSM-57
Other types characterised by their X-ray diffraction pattern and their defined composition: using at least one organic template directing agent
Catalytic processes: with crystalline alumino-silicates or with catalysts comprising molecular sieves
Characterised by the catalyst used: containing crystalline alumino-silicates, e.g. molecular sieves
Term end not estimated
This invention relates to a process for the preparation of molecular sieve of MFS framework type and to its use in catalytic conversion of organic compounds.
Molecular sieves of the MFS framework type, and in particular ZSM-57, are useful catalyst components for a variety of conversion processes, such as hydrocarbon cracking, dehydrogenation, oligomerization, isomerization, disproportionation, and alkylation as well as the formation of hydrocarbons from oxygen-containing compounds such as alcohols and ethers.
The composition, properties and preparation of ZSM-57 are disclosed in European Patent No. 174,121, and U.S. Pat. Nos. 4,873,067 and 4,973,781, the entire disclosures of these documents being incorporated by reference herein. ZSM-57 is a zeolite with a typical molar ratio of YO2:X2O3 of at least 4, wherein Y represents silicon and/or germanium and X represents aluminum, and/or boron, and/or chromium, and/or iron, and/or gallium. Preferably, there are from greater than 8 to about 200 moles of YO2 per mole of X2O3. Preferably, YO2 is silica and X2O3 is alumina.
FIG. 1 is the Scan Electronic Microscopy of the dried as-synthesized solid product of the Reference Example.
FIG. 2 is the Scan Electronic Microscopy of the dried as-synthesized solid product of Example 1.
FIG. 3 is the Scan Electronic Microscopy of the dried as-synthesized solid product of Example 2.
All patents, patent applications, test procedures, priority documents, articles, publications, manuals, and other documents cited herein are fully incorporated by reference to the extent such disclosure is not inconsistent with the present invention and for all jurisdictions in which such incorporation is permitted.
When numerical lower limits and numerical upper limits are listed herein, ranges from any lower limit to any upper limit are contemplated.
As used in this specification, the term “framework type” is used in the sense described in the “Atlas of Zeolite Framework Types,” eds. Ch. Baerlocher, W. H. Meier, and D. H. Olson, Elsevier, Fifth Edition, 2001, which is hereby incorporated by reference.