FIELD: chemical industry. SUBSTANCE: technological liquid in technological aqueous cutting agents is first aerated prior to decreased pH index of the liquid to be treated and it is then heat treated at 90-100 C and product is maintained for 0.5-2.0 hours at heat treatment temperature. Invention makes it possible to increase operation period of technological aqueous cutting agents with reduced production expenses for operation with technological aqueous cutting agents and longer period of storage thereof. EFFECT: improved properties of the title compounds. 1 tbl
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