Pentasil-structuer zeolithic material the production and use thereof
First Claim
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1. A zeolite material of the pentasil type comprising an alkali metal and alkaline earth metal content of not more than 150 ppm and a molar ratio of Si to Al of from 250 to 1500, wherein at least 90% of the primary particles of the zeolite material are spherical and at least 95% by weight of the spherical primary particles have a diameter of less than or equal to 1 μ
- m.
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Abstract
Zeolite material of the pentasil type has an alkali metal and alkaline earth metal content of not more than 100 ppm and a molar ratio of Si to Al of from 250 to 1500, at least 90% of the primary particles of the zeolite material being spherical and 95% by weight of the spherical primary particles having a diameter of less than or equal to 1 μm.
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Citations
13 Claims
- 1. A zeolite material of the pentasil type comprising an alkali metal and alkaline earth metal content of not more than 150 ppm and a molar ratio of Si to Al of from 250 to 1500, wherein at least 90% of the primary particles of the zeolite material are spherical and at least 95% by weight of the spherical primary particles have a diameter of less than or equal to 1 μ
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7. A process for the preparation of a zeolite material, comprising the steps
(i) providing a mixture containing at least one SiO2 source, at least one aluminum source and at least one template compound, wherein the mixture contains not more than 150 ppm of alkali metal and alkaline earth metal and wherein the at least one SiO2 source and the at least one aluminum source are used in a ratio which permits the formation of a crystalline material having a molar ratio of Si to Al of from 250 to 1500; -
(ii) reacting the mixture to give a mother liquor containing crystalline material, said crystalline material containing at least a portion of at least one template compound; (iii) separating the crystalline material from the mother liquor; and (iv) removing the at least one template compound from the crystalline material, the zeolite material comprising an alkali metal and alkaline earth metal content of not more than 150 ppm and a molar ratio of Si to Al of from 250 to 1500, wherein at least 90% of the primary particles of the zeolite material are spherical and at least 95% by weight of the spherical primary particles have a diameter of less than or equal to 1 μ
m. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A zeolite material of the pentasil type obtainable by a process comprising the steps
(i) providing a mixture containing at least one SiO2 source, at least one aluminum source and at least one template compound, wherein the mixture contains not more than 150 ppm of alkali metal and alkaline earth metal and wherein the at least one SiO2 source and the at least one aluminum source are used in a ratio which permits the formation of a crystalline material having a molar ratio of Si to Al of from 250 to 1500; -
(ii) reacting the mixture to give a mother liquor containing crystalline material, said crystalline material containing at least a portion of at least one template compound; (iii) separating the crystalline material from the mother liquor; and (iv) removing the at least one template compound from the crystalline material, said zeolite material comprising an alkali metal and alkaline earth metal content of not more than 150 ppm and a molar ratio of Si to Al in a range of from 250 to 1500, wherein at least 90% of the primary particles of the zeolite material are spherical and at least 95% by weight of the spherical primary particles have a diameter in the range of from less than or equal to 1 μ
m.
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Specification