Crystalline zeolite, method of preparing same and process for the production of olefins using same as catalyst
Abstract
Abstract A crystalline aluminosilicate having the following empirical formula: xM2O.yM'O.Al2O3.zSiO2.nH2O wherein M is an exchangeable cation selected from the group consisting of alkali metals, hydrogen and mixtures thereof, M' is an alkaline earth metal, x is between 0 and 1.5, y is between 0.2 and 40, z is between 12 and 3000 and n is between 0 and 40 and wherein x+y is 1.2 or more, said aluminosilicate having the X-ray diffraction lines of Table 1 of the specification. The crystalline aluminosilicate material is obtained by providing a reaction mixture containing water, a tetrapropylammonium compound and a source of an alkali metal oxide, an oxide of silicon, an oxide of aluminum and an oxide of an alkaline earth metal and having a composition falling within the following ranges: SiO2/Al2O3 molar ratio: 12-3000 OH-/SiO2 molar ratio: 0.02-10 H2O/SiO2 molar ratio: 1-1000 tetrapropylammonium ion/SiO2 molar ratio: 0.02-2 alkaline earth metal/Al atomic ratio: 0.03-300, and maintaining the mixture at a temperature and for a period of time sufficient to form crystals of the aluminosilicate. The aluminosilicate is useful as catalyst for converting methanol and/or dimethyl ether into lower olefins.
Inventors
- 👤 Hideo Okado
- 👤 Kazuo Hashimoto
- 👤 Kichinari Kawamura
- 👤 Yasuyoshi Yamazaki
- 👤 Haruo Takaya
Bibliographic Details
Claims Analysis
Total Claims: 6References Cited (Backward Citations)
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