Аңдатпа
The methods of cleaning used lubricants and coolants in the machine-building industry, providing a closed cycle of use, an increase in the service life of coolant several times, as well as an increase in the degree of purification of process fluids, are considered. The features of the methods are analyzed, advantages and disadvantages are revealed. An overview of patents is given. The advantages of the cleaning methods specified in the patents are revealed.