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US 5,955,394 AGranted
Recovery process for oxidation catalyst in the manufacture of aromatic carboxylic acids
AssigneeMobile Process Technology, Co.
InventorMichael D. Kelly
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AssigneeMobile Process Technology, Co.
InventorMichael D. Kelly
Estimating the term…
An improved separation process for the continuous catalytic oxidation of aromatic alkyls for the production of aromatic carboxylic acids in a liquid solvent medium, wherein the reactor product stream is withdrawn from the oxidation process, then separated to produce a product containing stream, mother liquor stream and a catalyst containing purge stream which is then passed through a filtration system and series of sorption vessels to remove the oxidation catalyst and separate the impurities from the catalyst. The solvent is then separated from the reaction by-products by conventional distillation methods. The solvent is recycled to the process while the reaction by-product residue is disposed of by incineration. The oxidation catalyst is eluted from the ion exchange columns and returned to the process.
A process for the recovery and recycle of the oxidation catalyst and product aromatic carboxylic acid in the mother liquor purge stream purged from the mother liquor after separation of the product aromatic carboxylic acid produced from the liquid phase oxidation of aromatic alkyls to aromatic carboxylic acids in which the mother liquor purge stream contains a lower aliphatic monocarboxylic acid as solvent;
Dependencies are inferred from the claim text.