Process for the purification of waste wash water
AssigneeMobile Process Technology, Co.
InventorMichael D. Kelly
Life of this patent
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Abstract
An improved apparatus and method for the purification of waste wash water derived from the production of aromatic acids. Lost aromatic acid product and the heavy metal oxidation catalyst is recovered and purified water is recycled to the process. The process includes the steps of filtration to recover the insoluble aromatic acid, ion exchange to recover and purify the heavy metal oxidation catalyst, and a reverse osmosis system for recovering the water for reuse.
Claims8
A method for the purification and recycle of waste wash water from the purification of aromatic acids wherein the waste wash water comprises insoluble aromatic acid, heavy metal oxidation catalyst, other heavy metal impurities and organic salts, comprising the steps of:
- (a) passing the waste wash water through a filter to recover the insoluble aromatic acid;
- (b) passing the waste wash water through an ion exchange resin to remove the heavy metal oxidation catalyst and other heavy metal impurities;
- (c) passing the waste wash water through a reverse osmosis system to remove the organic salts;
- and
- (d) returning the waste wash water to the aromatic acid purification process.
Dependencies are inferred from the claim text.