Ecotech technology generally relates to the field of recycling waste lubrication oils in the form of a useful fuel oil. It applies to a process and to innovative apparatus which allows the production of a high quality of diesel type fuel from waste lubricating oils.

Waste lubricating oils are defined here as any lubricating oils such as engine oil. Lubricating oil is usually produced from a certain boiling range (typically 300 to 500 degrees Celsius) cut of conventional crude oil. This material is usually called "Bright Stock" and accounts for about 70% to 80% of a typical lubricating oil. The remainder consists of various additives and they tend to be polymeric in nature.

Lubricating oils, while performing their job, ultimately deteriorate in their ability to satisfactorily perform any longer and have to be periodically changed out. While performing their job they pick dirt and heavy metals both from the metal parts of engine and from the fuels used in the engines and a typical used oil may contain significant quantities of Chromium, Cadmium, Zinc, and lead. Break down of the hydrocarbons making up the lubricating oil can also result in lower boiling point material being present. Handling of the used oil after removal from the engine can result in light solvent being added to it along with significant quantities of water.

Therefore, used lubricating oils are environmentally hazardous and have to be treated accordingly.

This technology is capable of turning environmentally hazardous material into a high quality of diesel engine fuel oil together with a relatively small amount of environmentally innocuous solid petroleum coke.

Feedstock from the waste oil storage tanks will be pumped to water evaporator (1) which boils the feedstock up to max. 130 C in order to have only less 1% of water of feedstock to be fed to the cracking pot (2) by the supercharging pumps within one hour time. There it is heated up to the temperature of 500”ĘC to 710”ĘC using hot flue gas. At this temperature the lubricating oils are thermally cracked into: volatile hydrocarbons C1-C4 fraction, the raw gasoline fraction, the fuel oil fraction, and a vacuum residue fraction NBP 550+”ĘC.The vacuum residue fraction is a heat carrier inside of cracking vessel and it is gradually degraded to coke during the operation. Light hydrocarbons C1-C4, gasoline and oil fractions are removed as the vapors to the air & gravity cooled condenser (4) through dephlagmator (3), lubricating oil vapors are condensed and feed in stabilization system (6). Designated amount of chemical at chemical tank (7) will be injected to stabilization system by water liquid or oil liquids in order to separate the solid materials and oily water.

Separated and stabilized oil will be fed in three phase separation centrifuge (8) to remove: the gasoline fraction, the oily water and not condensed vapors of light hydrocarbons C1-C4 - next burnt in the OCD stack (5) (called also off gas incinerator). The gasoline fraction is handled by the pump (16), the part is returned back to waste oil storage tanks as a reflux, while the rest is gathered in a storage tank. Any solid and oily water from the oil to be stored at intermediate product tank (9) which oil will be mixed with clay at mixing tank (10) under the designated ratio and then mixed oil with clay will be fed by pump to filter press system (11). Filtered oil (called Grade #2 product oil) will be pumped to oil receive tank (12) and final product oil will be delivered to main product oil storage tank for deliver to clients.

Residue from cracking will be ash caked at the pot bottom at temp up to 710 C as shown in batch cycle time frame and then ash cake is removed from the cracking pot and can be safely disposed by landfill or sold for road construction company.