Patent ID: 11926540
Assignee: SCIENTIFIC DESIGN COMPANY, INC.
Field: Environmental technology (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for removing impurities from an ethylene oxide manufacturing plant, the method comprising:
providing an aqueous bleed stream comprising 0.2 to 20 wt % ethylene glycol and having a first UV 220 nm transmittance; and
introducing the aqueous bleed stream to a cycle water treatment unit containing an anion exchange resin to reduce the content of impurities in the aqueous bleed stream, wherein the aqueous bleed stream at an outlet of the cycle water treatment unit has a second UV 220 nm transmittance and the second UV 220 nm transmittance is higher than the first UV 220 nm transmittance, wherein the anion exchange resin is a strong base anion exchange resin having a minimum total exchange capacity of 1 milliequivalent/ml of resin and a 95% particle size distribution in the range of 0.3 to 1.2 mm.