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Browse Prior Art Database

Effective EDTA (Ethylenediamine Tetraacetic Acid) Rinse Regeneration With Recyclable Resin

IP.com Disclosure Number: IPCOM000101141D
Original Publication Date: 1990-Jul-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 1 page(s) / 19K

Publishing Venue

IBM

Related People

Braitmayer, R: AUTHOR [+3]

Abstract

Disclosed is a method for the actinic extraction of EDTA from a contaminated rinse. For this purpose, a slightly alkaline anion exchanger (such as MP62*) is used which has previously been treated with a 5 - 7% solvent of hydrochloric acid. The resin in this salificated form has a high EDTA resorption (for MP62 about 110 g EDTA/l resin). The anion exchanger may be regenerated with a 5% sodium hydroxide solution. This highly concentrated EDTA solution is treated by EDTA precipitation with acid, and the salt may be recovered. * Trademark of Bayer.

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Effective EDTA (Ethylenediamine Tetraacetic Acid) Rinse Regeneration With Recyclable Resin

       Disclosed is a method for the actinic extraction of EDTA
from a contaminated rinse.  For this purpose, a slightly alkaline
anion exchanger (such as MP62*) is used which has previously been
treated with a 5 - 7% solvent of hydrochloric acid.  The resin in
this salificated form has a high EDTA resorption (for MP62 about 110
g EDTA/l resin). The anion exchanger may be regenerated with a 5%
sodium hydroxide solution.  This highly concentrated EDTA solution is
treated by EDTA precipitation with acid, and the salt may be
recovered.
*  Trademark of Bayer.