Method reducing UV absorption in ethylene glycols, water, and mi

Details Method reducing UV absorption in ethylene glycols, water, and mi Method reducing UV absorption in ethylene glycols, water, and mi

1996-05-09

1998-06-23

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568410, C07C 4500, C07C 2726

Patent

active

057707774

ABSTRACT:
Disclosed is a method of reducing the UV absorption of a solvent that comprises water, an ethylene glycol, or a mixture thereof, where the solvent contains at least 0.1 ppm of a dione, particularly 3-methyl-2-hydroxy cyclopent-2-eneone or its tautomer, 3-methyl-1, 2-cyclopentanedione. The solvent is passed through an anionic exchange resin containing strong base sites. The UV absorbance of the effluent from the anionic exchange resin can be monitored and, when it increases, the resin can be reactivated by passing an aqueous solution of a base through it.

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