Apparatus for continuous liquid-phase oxidation reaction Patent #: 4062654
ApplicationNo. 05/771493 filed on 02/24/1977
US Classes:422/215, And internal mixing means261/122.1, Submerged screen261/93, Submerged blast261/97, Liquid-flow control422/226, In positive pressure reactor422/231, Gas sparger type mixing means submerged in liquid reactant422/235, And means heating or cooling loop or reaction mass located therein422/236, Including means separating reaction chamber into plural reactant-containing compartments and means moving reactant therebetween422/240, Including specific material of construction562/410, Nitrogen containing oxidant562/414, With recycle or recovery of reaction component562/416Halogen containing catalyst, initiator, or promoter utilized
ExaminersPrimary: Marcus, Michael S.
Attorney, Agent or Firm
International ClassesC07C 51/16 (20060101)
C07C 51/265 (20060101)
B01J 19/18 (20060101)
B01J 4/00 (20060101)
Foreign Application Priority Data1976-02-24 JP
AbstractAn 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/m2 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.