Catalyst of chlorination and combined chlorination/fluorination

Details Catalyst of chlorination and combined chlorination/fluorination Catalyst of chlorination and combined chlorination/fluorination

1977-04-28

1978-09-12

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252441, B01J 2724, B01J 2712

Patent

active

041136551

ABSTRACT:
The catalyst consists essentially of a calcium fluoride matrix and a thermally stable copper-containing phase as produced by coprecipitation of calcium fluoride and copper fluoride and/or calcium hydroxide and copper oxide, in presence of alkali metal or ammonium ion. The coprecipitate is thoroughly dried and heated at elevated temperature; followed, if the coprecipitate is in the form of hydroxide and/or oxide, by conversion of such hydroxide and oxide to fluoride.
The preferred alkali metal ion is potassium.
The most active and stable catalysts show by X-ray diffraction a pattern including lines characteristic of calcium fluoride and additional lines indicative of a face-centered cubic unit cell having unit dimension of about 8.1-8.4 A.
The catalyst operates at about 200.degree.-550.degree. C. depending to some extent on the substrate.

REFERENCES:
patent: 1216933 (1917-02-01), Bosch et al.
patent: 1681751 (1928-08-01), Storch
patent: 2154527 (1939-04-01), Pier et al.
patent: 2578913 (1951-12-01), Whitman
patent: 2636864 (1953-04-01), Pye et al.
patent: 2739989 (1956-03-01), Barrijen et al.
patent: 2784236 (1957-03-01), Spector et al.
patent: 3591646 (1971-07-01), Vecchio et al.

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