Oil in use process will produce glial, asphaltene and acidic substances, and mixed with a large number of metal debris, metal powder and other particulate matter, with the extension of the use of time, these impurities will be more and more, resulting in oil lubrication effect decreased or lost of lubrication performance become waste oil.

Regeneration of waste lubricating oil treatment method are many, but whether it is what kind of treatment methods are inseparable from a special adsorption agent, the activated clay, activated clay in the waste oil regeneration process has a great effect, and this effect is unmatched by other similar adsorption.

Regeneration of waste lubricating oil processing process by precipitation, distillation, acid washing, activated clay purification four consists of the main steps, the precipitation and distillation is relatively simple, and pickling and activated clay purification is relatively complex.

Precipitation: precipitation is mainly to remove the waste oil in the water and the larger metal debris. There are two kinds of natural precipitation and heating precipitation, natural precipitation is the waste oil poured into the container, so that impurities by gravity slowly settling down to the bottom. Precipitation in general should be about 15 degrees in the environment, the precipitation time is generally 5-15 days; heating precipitation is the use of steam heating waste oil, so that it reached 60-80 degrees after precipitation, precipitation time is 24-48 hours.

Distillation: distillation is the waste oil in the gasoline, diesel oil and other separation, if there is no other oil in the waste oil can not be distilled, directly to the pickling process.

Pickling process: sulfuric acid treatment is to remove the oil in the glial, asphaltene and other oxides. The concentration of sulfuric acid used in more than 93%, the amount of between 8%-15%. Turning waste oil heated to 40 DEG C or so adds the sulfuric acid, edge bordered stirring, stirring 2O-30 minutes after adds the concentration of 5% - 10% aqueous solution of caustic soda about 1%, light stir 5 minutes, static precipitation 2-4 hours after the release of the first acid slag, subsidence 4-6 hours to release the second acid slag, settlement temperature to remain at more than 20 DEG C.

Purification of activated clay: activated clay surface with countless holes, has very strong adsorption force, absorb small impurities of waste oil. Will after pickling waste oil heating to 120-140 DEG C, adding 10% - 15% of the activated clay, stirring 30-40 minutes after static precipitation 4-8 hours, the temperature dropped to 80 DEG available machine oil pump and a fine filter to extract. At this time, the waste oil regeneration end processing. In order to improve the adsorption capacity of clay, it is recommended to use the activated clay drying at 110 DEG C for 2-3 hours.