Small crystal ZSM-5, its synthesis and use
AssigneeExxonMobil Oil Corporation
InventorsJeffrey S. Beck, Carrie L. Kennedy, Wieslaw J. Roth, David L. Stern
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Abstract
A synthetic porous crystalline material has the structure of ZSM-5 and a composition involving the molar relationship: X2O3:(n)YO2, wherein X is a trivalent element; Y is a tetravalent element; and n is less than 25, and wherein the slope of the nitrogen sorption isotherm of the material at a partial pressure of nitrogen of 0.4 to 0.7 and a temperature 77°K is greater than 30. The material has a mesoporous surface area (MSA) greater than 45 m2/g and is useful as a catalyst in the liquid phase isomerization of xylene.
Claims10
A synthetic porous crystalline material having the structure of ZSM-5 and a composition involving the molar relationship:
- X2O3:(n)YO2,
- wherein X is a trivalent element;
- Y is a tetravalent element;
- and n is less than 25, and wherein the slope of the nitrogen sorption isotherm of the material at a partial pressure of nitrogen of 0.4 to 0.7 and a temperature of 77°K is greater than 30.
Dependencies are inferred from the claim text.