Regeneration of aqueous degreasing and cleaning solutions

摘要

A process for regenerating and recycling aqueous alkaline or neutral degreasing and cleaning solutions contaminated with emulsified oils by adding thereto cationic surfactants or cationically modified polymers or a combination of cationic surfactants and cationically modified polymers to break the emulsions. The contaminants which precipitate are mechanically separated off and the cleaning solution is thereby regenerated without loss of cleaning efficacy.