Method to recover organic tertiary amines from waste sulfuric acid

摘要

The present invention describes a method to recover organic tertiary amines from waste sulfuric acid comprising the following steps:
a) reacting
i) waste sulfuric acid comprising organic tertiary amines with
ii) ammonia in an amount sufficient to obtain a pH of 9.5 or higher and
b) separating the organic tertiary amines from the reaction mixture obtained in step a) wherein during the separation the pH of the reaction mixture is adjusted at a pH of 9.5 or higher.