Apparatus for producing aromatic dicarboxylic acids

Details Apparatus for producing aromatic dicarboxylic acids Apparatus for producing aromatic dicarboxylic acids

1977-02-24

1979-06-26

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including solid, extended surface, fluid contact reaction...

422226, 422231, 422235, 422236, 422240, 261 93, 261 97, 261122, 562416, 562410, 562414, B01J 810, C07C 6314

Patent

active

041593073

ABSTRACT:
An apparatus for producing an aromatic dicarboxylic acid by oxidizing a benzene derivative with molecular oxygen in the liquid phase in a lower aliphatic carboxylic acid as a solvent in the presence of an oxidation catalyst, wherein a starting material liquid e.g., a benzene derivative or a solution thereof in the lower aliphatic carboxylic acid, is fed into the liquid-phase reaction system in a uniformly dispersed state by being passed through a porous material causing the pressure of the starting material liquid just after passing through said porous material to drop more than about 1 kg/m.sup.2 in relation to the pressure of the starting material liquid just before passing through said porous material. The resultant aromatic dicarboxylic acid has high purity and has good color.

REFERENCES:
patent: 3093626 (1963-06-01), Cines
patent: 3407179 (1968-10-01), Carr
patent: 3677714 (1972-07-01), Ledgett
patent: 3721530 (1973-03-01), Bouchet
patent: 4062654 (1977-12-01), Shigeyasu et al.

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