Apparatus for the continuous liquid-phase catalytic oxidation of

Details Apparatus for the continuous liquid-phase catalytic oxidation of Apparatus for the continuous liquid-phase catalytic oxidation of

1979-02-09

1981-01-06

Scovronek, Joseph

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including internal mixing or stirring means

366101, 366306, 366328, 422135, 422193, 422195, 422226, 422228, 562416, B01F 716, B01J 1918, C07C 5116

Patent

active

042436362

ABSTRACT:
In an apparatus for oxidizing an alkyl-substituted aromatic compound in the liquid phase with a molecular oxygen-containing gas in a lower aliphatic carboxylic acid solvent in the presence of an oxidation catalyst, said apparatus comprising a reaction vessel, a gas exhaust port at the top of the vessel, an inlet at the bottom of the vessel for feeding said molecular oxygen-containing gas, an inlet for feeding said solvent, an inlet for feeding said catalyst, an inlet for feeding said alkyl-substituted aromatic compound, an outlet for withdrawing the oxidation reaction product, and an agitator within the vessel, said agitator consisting of a rotating shaft provided along the axial direction of the vessel and a plurality of stages of agitating blades secured to said rotating shaft at spaced intervals; the improvement wherein at least one stage of agitating blades consists of comb-like flat blades each of which is composed of a plurality of comb tooth-like pieces aligned at spaced intervals.

REFERENCES:
patent: 1781435 (1930-11-01), Carper
patent: 1870980 (1932-08-01), Altwegg
patent: 2075070 (1937-03-01), Upton
patent: 2191830 (1940-02-01), Leedy
patent: 2257533 (1941-09-01), Reich
patent: 3130015 (1964-04-01), Monroe
patent: 3174830 (1965-03-01), Watzl et al.
patent: 3839435 (1974-10-01), Shigeyasu et al.
patent: 3845939 (1974-11-01), Waldenville
patent: 4062654 (1977-12-01), Shigeyasu et al.
patent: 4159307 (1979-06-01), Shigeyasu et al.

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