Highly siliceous form of zeolite RHO
AssigneeExxonMobil Technology and Engineering Company
InventorsJoseph M. Falkowski, Hilda Bouza Vroman, Allen W. Burton, Eugene Terefenko, Kanmi Mao, Karl G. Strohmaier
Life of this patent
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Abstract
A composition can include a Rho zeolite with a RHO topology having a Si to B ratio or a Si to Al ratio greater than or equal to 8. Making such a composition can include heating an aqueous reaction mixture having a molar ratio of atomic Si to atomic B of about 4 to about 50 or a molar ratio of atomic Si to atomic Al of about 4 to about 50 in the presence of a C4-C6 diquat of N,2-dimethylbenzimidazole structure directing agent to a temperature of at least 75° C. to produce a Rho zeolite.
Claims24
A composition comprising:
- a Rho zeolite with a RHO topology having a Si to B ratio greater than or equal to 8 wherein the Rho zeolite has a BET surface area about 950 m2/g to about 1100 m2/g, a micropore volume of about 0.25 cm3/g to about 0.50 cm3/g, and an average diameter of 0.1 microns to 25 microns.
A method comprising:
- heating an aqueous reaction mixture having a molar ratio of atomic Si to atomic B of about 4 to about 50 or a molar ratio of atomic Si to atomic A1 of about 4 to about 50 in the presence of a structure directing agent of Compound I, Compound II, Compound III, or a mixture of two or more of Compounds I, II, and III to a temperature of at least 75° C. to produce a Rho zeolite;
Dependencies are inferred from the claim text.