Process for the preparation of 1,4-naphthoquinone

Details Process for the preparation of 1,4-naphthoquinone Process for the preparation of 1,4-naphthoquinone

1976-04-30

1977-07-12

Garner, Vivian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603464, C07C 4966

Patent

active

040353990

ABSTRACT:
In the process for the preparation of 1,4-naphthoquinone by vapor phase oxidation of naphthalene with a molecular oxygen containing gas using a solid catalyst consisting essentially of an inert carrier supporting thereon a catalyst composition comprising as essential active components vanadium pentoxide, an alkali metal sulfate and an alkali metal pyrosulfate, the improvement which comprises supplying to the raw material feed sulfur or a sulfur compound capable of yielding sulfur trioxide in a system as to maintain the equilibrium between the alkali metal sulfate and the alkali metal pyrosulfate in the catalyst composition and keep the proportion of the active components constant.

REFERENCES:
patent: 2765323 (1956-10-01), Dixon et al.
patent: 2989544 (1961-06-01), Saunders et al.
patent: 3095430 (1963-06-01), Wettstein
patent: 3232955 (1966-02-01), Nonnenmacher
patent: 3379741 (1968-04-01), Ischampen
patent: 3402187 (1968-09-01), Kaiser et al.
patent: 3897464 (1975-07-01), Dohm et al.

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