Molybdenum-exchanged crystalline aluminosilicate zeolite

Details Molybdenum-exchanged crystalline aluminosilicate zeolite Molybdenum-exchanged crystalline aluminosilicate zeolite

1979-10-02

1981-10-27

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252439, 423112, 208111, 585486, B01J 2916, B01J 2926, B01J 2936

Patent

active

042972434

ABSTRACT:
Molybdenum is ion exchanged into a crystalline aluminosilicate zeolite, replacing metals such as sodium, calcium, and potassium, by contacting the zeolite with an aqueous solution containing molybdenyl cations (i.e., MoO.sub.2.sup.2+) and having a pH below 7.0 but higher than that which would substantially affect the crystallinity of the zeolite. The resulting zeolite, when calcined or sulfided, is useful as a catalyst for hydrocarbon conversion reactions, particularly with respect to the hydrodealkylation of toluene to benzene and methane.

REFERENCES:
patent: 3013988 (1961-12-01), Bukata et al.
patent: 3308069 (1967-03-01), Wadlinger et al.
patent: 3794598 (1974-02-01), Schlaffer
patent: 3839228 (1974-10-01), Kirsch et al.
patent: 3875081 (1975-04-01), Young
patent: 3959179 (1976-05-01), Mikousky et al.
"Prep. and Characterization of Zeolites Containing Exchanged Molybdenum" by Tsigdinos et al., Climax Molybdenum Co. of Mich., Document No. L-287-34, 11-19-76.
Chemical Abstract No. 84:46729g (East German Patent No. 110,835).
"Catalytic Properties of Molybdenum Zeolites in Epoxidation of Cyclohexene" by Dai et al., A Catalysis Society Meeting, Mar. 18-22, 1979, Chicago, Ill.

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