Class / Patent application number | Description | Number of patent applications / Date published |
508111000 | Processes of purifying or recovering used lubricant compositions, and purified or recovered products thereof | 7 |
20100179080 | PROCESS FOR RECOVERING USED LUBRICATING OILS USING CLAY AND CENTRIFUGATION - A process for recovering used lubricating oils, and oils recovered using the process. In a first embodiment (for used industrial oils), the used lubricating oil is mixed with clay in a reactor. The mixture is preferably heated to between 80 and 200 degrees Celsius. The temperature should not be too great, to avoid “cracking” the oil (i.e., breaking molecular chains in the oil). After a certain period of time, the mixture is pumped through filters. Cakes of clay and contaminants remain in the filters, while the oil emerges without the contaminants. A second embodiment (for removing ash or soot, very fine carbon particles and other organic compounds from used motor oils) is the same as the first embodiment, except that before the mixture is passed through the filters, a centrifuge is used to remove most of the clay contaminated with soot, so that it will not block the filters. | 07-15-2010 |
20120088702 | PROCESS FOR IMPROVING A RE-REFINED LUBE OIL STREAM - Embodiments of a process for improving a re-refined lube oil stream are provided. The process comprises the steps of introducing a gas stream comprising hydrogen (H | 04-12-2012 |
20120289441 | PROCESS FOR RECOVERING USED LUBRICATING OILS USING CLAY AND CENTRIFUGATION - A process for recovering used industrial and motor lubricating oils. In a first embodiment (for used industrial oils), the used lubricating oil is mixed with clay in a reactor. The mixture is preferably heated to between 105 and 200 degrees Celsius. The temperature should not be too great, to avoid “cracking” the oil (i.e., breaking molecular chains in the oil). After a certain period of time, the mixture is pumped through filters. Cakes of clay and contaminants remain in the filters, while the oil emerges without the contaminants. A second embodiment (for removing ash or soot, very fine carbon particles and other organic compounds from used motor oils) is the same as the first embodiment, except that before the mixture is passed through the filters, a centrifuge is used to remove most of the clay contaminated with soot, so that it will not block the filters. | 11-15-2012 |
20130045903 | Process and Apparatus to Remove Oxidation Products from Used Oil - An apparatus for removing contaminants from used lubricating or hydraulic oil includes a fluid transfer unit that includes an inlet port and an outlet port. The inlet port can be in fluid communication with a source of the used lubricating or hydraulic oil. The fluid transfer unit can define a fluid path. The apparatus can include a first adsorbent and a second adsorbent in the fluid path. The first adsorbent can include cellulose. The second adsorbent can include silica gel. | 02-21-2013 |
20130109599 | METHOD FOR RECOVERING OIL FROM USED LUBRICANTS | 05-02-2013 |
20160060565 | PROCESS FOR PURIFYING OILS AND PRODUCTS PRODUCED FROM THE PURIFIED OILS - Processes for purifying used cooking oil, and for isolating fractions from the used cooking oil that can be used in biodiesel and lubricant compositions, are described. Winterization of used cooking oil allows separation of particulate impurities, and the resulting oil can be further winterized to allow the oil to separate into fractions which include relatively higher and relatively lower FFA concentrations than the starting oil. Fractions can then be isolated, and those fractions with sufficiently low FFA concentrations can be used in biodiesel applications, and fractions with relatively higher FFA concentrations can be used in certain lubricant formulations, including chain saw lubricants and mould release oil compositions. | 03-03-2016 |
20160060566 | BLOWN AND STRIPPED PLANT-BASED OILS - A method for producing a high viscosity, low volatiles blown stripped plant-based oil is provided. The method may include the steps of: (i) obtaining a plant-based oil; (ii) heating the oil to at least 90C; (iii) passing air through the heated lilt to produce a blown oil having a viscosity of at least 200 cSt at 40C; (iv) stripping the blown oil from step (iii) to reduce an acid value of the blown oil to from 5 mg KOH/g to about 9 rag KOH/g; (v) adding a polyol to the stripped oil from (iv), and (vi) stripping the oil from step (v) to reduce the acid value of the oil to less than 5.0 mg KOH/g or less. | 03-03-2016 |