Process for recovering used lubricating oils using clay and centrifugation
Inactive Publication Date: 2008-03-20
MARTIN DE JULIAN PABLO +2
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[0031]It is another object of the invention to provide an improved process for recycling automotive lubricating oils.
[0032]It is a further object of the invention to reduce pollution to the environment from discarded used lubricating oils.
[0033]Still another object of the invention is to reduce th
Problems solved by technology
An important observation in this process is that, if this is performed in a continuous way, with feeding of used oil and preheated clay through the bottom of the reactor and gathering of recovered oil from the upper side, then the oil still
Method used
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example 1
A treatment of 1,800 liters of used oil of industrial origin was performed, to show the effectiveness of the present invention.
Process of Recovery of Used Industrial Oils (Example Industrial Plant)
Materials.—
[0045]1,800 liters of lubricating oils for industrial gears coming from Carbonorca Enterprise C.A.
Initial Characteristics of the used Oils.—
1. Color: Opaque brown, non-translucent.
[0046]2. Presence of free water and / or in emulsion: (10-50% v / v).
3. Presence of solid suspended particles (>1000 mg / Kg, 0-30% v / v)
[0047]4. pH: >7
5. Aromatics: <1 mg / Kg.
6. Solvents: 0-10% v / v.
System of Absorbent / Adsorbent.—
[0048]Activated clays, hybrid type of hormite and smectite, with acid characteristic, with pH (5% solids diluted in H2O) equal to 2.5-3.0, density of 336-416 g / l, and particle size, by sieve analysis (Tyler Standard), particles with sizes less than 150 μm: 100%, and particles with sizes less than 45 μm: of 73-76%.
Procedure Description.—
[0049]1) Pre-filtration: The used industrial oil ...
example 2
[0057]A laboratory experiment was performed, with a sample of used motor oil. The following is a description of the details of the experiment:
Materials:
[0058]800 ml of used oil, coming from a Fiat “Ritmo” car, 1987 model, 1600 ml motor, with 45 days of running, and a total of 55,000 km passed over. The original oil was PDV (Petroleum of Venezuela) brand, 20W-50W multigrade (Experiment No. 1). There was also used 800 ml of a mixture of used oils coming from an workshop for oil change, located in Maracay, Aragua State-Venezuela (Experiment No. 2).
System of Absorbent:
[0059]Activated clays, hybrid type of hormite and smectite, with acid characteristic.
Experimental Process and Preparation of Samples for Analysis:
[0060]A sample of 800 grams of used motor oil was put in a glass beaker, with a magnetic stirrer inside, and was placed on an electric heating plate with continuous magnetic stirring.
[0061]The heating of the sample was between 100-120° C. during 30 minutes, in order to eliminate ...
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Abstract
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.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to the removal of contaminants from industrial used lubricating oils and used motor oils by treatment of the used oil with clay at high temperatures, but at lower temperatures than that of “cracking”, and later removing the contaminated clay by filtration and centrifugation.[0003]2. Description of the Prior Art[0004]The recycling of used lubricating oils coming from industrial processes, car motors, transmissions and other sources is an important process, because it avoids contamination by lubricating oils, and allows the recovery of lubricating base oils, which are a scarce product. The oils form a monomolecular layer on the surface of the water, which it means that a small quantity of oil can contaminate a great volume of water.[0005]The recovered lubricating oil bases have all the properties of the first refining, and they can be used to produce new oils. The recycling process can be don...
Claims
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IPC IPC(8): C10M175/06
CPCC10M175/0058C10M175/0008
Inventor MARTIN DE JULIAN, PABLOPADRINO TORRES, LEONARDO RAMONTORRES FONSECA, PEDRO ADOLFO
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