PROCEDURE FOR PRODUCTION OF ANTIOXIDANT ADDITIVE TO LUBRICATING OILS Russian patent published in 2011 - IPC C10M133/44 C10N30/10 C07D403/12 

FIELD: oil and gas production.

SUBSTANCE: invention refers to improved procedure for production of antioxidant additive to lubricating oils consisting in interaction of mono-ethers of di-carbonic acids with poly-ethylene-poly-amine at presence of catalyst. As poly-ethylene-poly-amine in the procedure there is used tetra-ethylene-pentamine. Interaction is performed together with mono-ether of di-carbonic acid on base of poly-ethylene-glycol and mono-ether of the same acid on base of fatty alcohol at temperature 120-125°C. As a catalyst there is used mixture of cation-exchanging resin KU-2 with caustic potassium at ratio of 1:1 taken at amount of 1.5-2.0 wt % from total amount of mono-ethers. Produced additive is used for mineral lubricating oils, oil lubricating-cooling substances and other oil products with tendency to oxidation.

EFFECT: simplified procedure for production of antioxidant additives, improvement of their operational properties.

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