Chemistry of inorganic compounds – Zeolite – Structure defined x-ray diffraction pattern
Patent
1992-04-03
1993-10-19
Dees, Carl F.
Chemistry of inorganic compounds
Zeolite
Structure defined x-ray diffraction pattern
423700, 502 77, C01B 3324, B01J 2928
Patent
active
052543277
ABSTRACT:
A zeolitic material with a crystalline structure of MFI type has a ratio of silica to alumina which is lower than 26, and is hydrothermally prepared without organic template reagents or seeding procedures. Crystalline structure is obtained by forming a mixture of a silicon dioxide source, an alkali metal hydroxide, an aluminum source and water, all reactants with the following molar ratios: ##EQU1## where M is an alkali metal, and reacting the mixture at a temperature from 160.degree. to 180.degree. C. for 40-80 hours. The material is characterized by X-ray diffraction, and has good cracking activity and improved selectivity for gasoline octanes.
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patent: 3334964 (1967-08-01), Reid, Jr.
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patent: 4452907 (1984-06-01), Ball et al.
patent: 5102644 (1992-04-01), Plank et al.
Alvarez Nieves
Lopez Carmen M.
Lujano Juan A.
Machado Francisco
Martinez Nelson P.
Dees Carl F.
Intevep S.A.
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