Apparatus and method for recovering acetic acid and catalyst...

Liquid purification or separation – With heater or heat exchanger – With treating fluid addition

Reexamination Certificate

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C210S179000, C210S180000, C210S321600

Reexamination Certificate

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07396457

ABSTRACT:
An apparatus and a method for effectively recovering acetic acid and catalyst from a mother liquor discharged from a series of processes including an oxidation process, a crystallization process and a solid-liquid separation process, in a continuous process for preparing naphthalenedicarboxylic acid by oxidizing dimethylnaphthalene in the presence of an oxygen-containing gas and an acetic acid solvent, using a catalyst system comprising a transition metal such as cobalt or manganese, and a bromine-based compound, are provided.

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Global Spec; Mar. 25, 2005; XP002405331; http://separationequipment.globalspec.com/LearnMore/Processing—Equipment/Filtration—Separation—Products/Liquid—Solid—Filtration—Separation—Equipment.

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