A method for continuous purification of motor lubricant oil includes circulating lubricant oil between a motor lubricant oil tank and a motor; transporting contaminated lubricant oil from the motor lubricant oil tank in a cleaning loop. The transport in the cleaning loop includes adding at least one liquid separation aid to contaminated lubricant oil; supplying contaminated lubricant oil to a three-phase centrifugal separator; continuously separating contaminants from the lubricant oil in the separator and continuously discharging a first liquid phase including purified lubricant oil from a liquid light phase outlet of the separator, continuously discharging a second liquid phase including solid contaminants from a liquid heavy phase outlet of the separator and continuously discharging a sludge phase from a sludge outlet by the aid of a conveyor screw of the three-phase separator. The method further includes transporting the first liquid phase including purified oil back to the lubricant oil tank. The present invention further provides a system for carrying out the method.

A mobile system and method for separating lubricants from swarf material streams provides on-site recovery of lubricants in an efficient, effective, sustainable and economic manner. The system thus reduces the need to transport relatively large volumes of swarf and lubricant material stream to a remote location for disposal. The system includes swarf of various types, for example, aluminum, steel, precious metals, plastic, etc. mixed with various water based or oil based lubricants. A trailer or motor vehicle containing a power supply, a basket centrifuge(s) connected to the power supply for powered operation thereof, a live bottom conveyor for supplying swarf to the centrifuges, a portable feed hopper with attached augers for supplying swarf to the live bottom conveyor, a bag liner to filter the extracted lubricant as it exits the basket, a crane for lifting the bag liner out of the basket, a container to accumulate the dried swarf, a container to accumulate the extracted lubricant.

The invention relates to a method for lowering the content of polycyclic aromatic hydrocarbons (PAH) in a used lubricant composition, in which said used lubricant composition passes over activated carbon, said method not comprising a solvent extraction step.

The present invention provides method for separating contaminants from a liquid mixture comprising the steps of a) providing a feed of said liquid mixture to be purified, b) adding a separation aid to the liquid mixture to be purified, wherein said separation aid is capable of binding said contaminants and c) supplying a flow of compressed air into said feed after step b) has been performed to provide a feed comprising air. The method further comprises steps d) removing air from said feed comprising air to provide a deaerated feed; and e) supplying said deaerated feed to a separator, and f) separating a phase comprising contaminants and said separation aid from said liquid mixture in said separator, wherein the separation aid added in step b) is insoluble in said liquid mixture at the separation conditions in step f). The present invention further provides a system for separating contaminants from a liquid mixture.

The present invention relates to a method for efficiently regenerating waste lubricating oil and belongs to the technical field of waste lubricating oil recovery and treatment. The method for efficiently regenerating waste lubricating oil is provided to solve a problem that existing waste lubricating oil has a high metal ion content. The method includes: adding the waste lubricating oil into a reaction vessel, performing a stirring treatment under the action of a cuprous-containing catalyst to form an aggregate, and then performing filtration and separation to directly remove the aggregate, to obtain corresponding regenerated lubricating oil. The present invention can effectively realize separation and removal of a metal ion, directly filter and separate, avoid emulsification, and obtain high quality lubricating oil having a low total metal ion content.

The present invention is a solid lubricant treatment medium, usually but not always in bead form, suitable to be brought into contact with lubricants to remediate and to condition them. A key feature of the medium, typically a polymeric resin, is the presence of relatively very large pores, which are able to capture and remove fine lubricant contaminants and breakdown products (such as small phosphate ester varnish, soot, coke, dissolved metal or other small semi-soluble or insoluble particles). Resins and adsorbents of the prior art have proven unable to remove fine contaminants like phosphate ester varnish that have a deleterious impact on industrial equipment performance and reliability. The mean pore size diameter of the medium is between about 8,000 and 100,000 and, more preferably, in the range of about 20,000 to about 80,000 .

The present invention is a solid cooling fluid treatment medium, usually but not always in bead form, suitable to be brought into contact with coolants to remediate and to condition them. A key feature of the medium, typically a polymeric resin, is the presence of relatively very large pores, which are able to capture and remove ultrafine coolant contaminants and breakdown products (such as colloids, soot, coke, organics, scale or other small semi-soluble or insoluble particles). Resins and adsorbents of the prior art have proven unable to remove ultrafine contaminants like these that have a deleterious impact on industrial equipment performance and reliability. The mean pore size diameter of the medium is between about 1,500 and 100,000 and, more preferably, in the range of about 1,500 to about 80,000 .

A system and process for recycling machining waste into a solid/scrap material component and a recyclable machining coolant. The system and process comprise collecting the waste machining waste and mechanically separating the machining waste into a solid/scrap material component and a machining waste liquid component. The machining waste liquid component is decanted to separate oils and solids from the recyclable machining coolant. The machine recyclable machining coolant is then filtered through at least a first filter and preferably a second, finer mesh filter. The recyclable machining coolant is then exposed to UV light to kill bacteria and microorganisms. Lastly, ultrapure water is added to dilute the recyclable machining coolant and form the recycled machining coolant. If desired, a virgin machining coolant can be added to the recycled machining coolant, to replenish any additive(s) stripped during the recycling process, prior to resale of the recycled machining coolant.

A filtration system includes a bin having a base, an inlet configured to receive contaminated fluid, and an outlet. The bin further includes a plurality of metal chips positioned on a plate, such as a perforated plate, above the base of the bin. The contaminated fluid, such as contaminated coolant, may flow through the inlet toward the base of the bin and pass up through the plate and the chips to filter away contaminations.

In a method and a system for purification of contaminated oil, the contaminated oil and a liquid separation aid are provided in a mixing tank and then mixed into a mixture. Thereafter, the mixture is filtered.