Low acidity alumina-bound zeolites containing tetrahedral boron, gallium, indium and/or thallium
This patent describes a method of preparing a composition comprising a zeolite and a matrix comprising alumina wherein the composition exhibits an alpha value of the zeolite, wherein the zeolite has a SiO/sub 2//Al/sub 2/O/sub 3/ molar ratio of at least about 10, ahs an alpha value of less than about 100 and contains a framework tetrahedral element selected from the group consisting of B, Ga, In and Tl, wherein the method comprises: (a) providing the zeolite containing an alkylammonium salt; (b) ion exchanging the zeolite to replace alkali metal cations with ammonium cations; (c) binding the zeolite with an aluminum containing material; and (d) calcining the zeolite containing aluminum material to decompose organic material and convert the zeolite to the acid or hydrogen form, and thereby producing the composition having the alpha value which is the alpha value of the zeolite in the acid or hydrogen form, absent the matrix. The method of claim 1, wherein the zeolite containing aluminum material is dried to eliminate excess water, prior to calcining.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4788169
- OSTI ID:
- 6337653
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BORON COMPOUNDS
CALCINATION
CATALYSTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DECOMPOSITION
DRYING
GALLIUM COMPOUNDS
INDIUM COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
THALLIUM COMPOUNDS
THERMOCHEMICAL PROCESSES
ZEOLITES