Recycling used oil, in addition to high economic and environmental benefits, preserves natural resources with valuable crude oil. This has attracted politicians and investors to the industry. Due to the fact that the most important component of the production of lubricants in terms of volume is base oil and in terms of weight, on average, more than 95% of the formulation of a lubricant is many countries, including the United States, Canada, Britain, Germany, France, Italy , Brazil, South Africa, etc. supply their required base oil through refining burnt oils, this leads to:

• Preservation of natural resources of crude oil (production of 1 liter of oil requires 42 liters of oil)
• Less dependence on external sources of base oil
• Preservation of groundwater resources and ecosystems of oceans, rivers, lakes and nature
• Reduce environmental hazards from burnt oil
• Energy saving (refining energy consumption is 50% to 85% less than virgin oil production from oil refining)
• Prevent greenhouse gas emissions

Oil Base

The base oil produced is in accordance with the API standard of group I, which is a very suitable food for formulating and formulating a wide range of oils: engine, turbine, It is hydraulic, gear, grease, etc.

Industrial distillation fuel

This product can be used as an alternative fuel or light fuel in industrial flame boilers or heaters

Asphalt slag </ strong>

This type of slurry contains a large amount of polymer and metal that can be used in the production of street asphalt, bituminous protective coating or as a mulch in cement factories.

• Low oil time in contact with hot surface (a few seconds)
• High heat transfer in the membrane
• Evaporation at low temperature
• High heat transfer coefficients
• Low pressure drop during evaporation
• Maintain the properties and quality of the oil
• Self-cleaning capability
• Suitable for high viscosity and viscous liquids
• High economic benefits
• Compliant with environmental standards
• High production efficiency (no corrosion, rust and coke formation)
• Product placement in the group (API I & API II)
• Without the use of soil and acid
• Low energy consumption
• Reduction of production process and labor force
• High separation rate (removal of pollutants and production of quality base oils
• High production efficiency of more than 90%
• Control and removal of toxic and odorous substances

In this method, the oil first passes through the primary filters to separate its unsaturated contaminants, after this stage, light cuts including water, diesel, gasoline enter the distillation tower under vacuum. It is guided by a controllable temperature which, after separating water and diesel and combined vapors, leaves the distillation tower and enters the separation column, where water and aromatics are separated from the diesel / kerosene (kerosene) and separated from the top. The column exits toward the light-cut condenser.

The remaining dehydrated dirty hydrocarbons are then directed to the wiped film evaporator to separate the heavy and light oils. The light hydrocarbons in the wiped film evaporator are first evaporated and The oil is charged through a condenser designed outside to the receiver storage tank. The heavy chain hydrocarbons are then directed to the second wiped film evaporator to separate the heavy materials of the oil and the oil is charged to the receiver storage tank through a condenser designed outside. The rest of the material consists of solid waste and bitumen that settles to the bottom of the wiped film evaporator chamber.

• Various methods of recovering burnt oil

  1- acid wash method

  Advantages: It is a very simple method, does not require expert manpower, difficult operating conditions, modern and sophisticated equipment.

  Main Disadvantages: Introduces heavy pollutants into the environment, high recycling cost, long production time and low product quality.

  2- Acid-activated clay method

  Advantages: No need for acid, simple process, suitable for low capacity plans.

  Disadvantages: High consumption and low yield of clay, disposal of large amounts of clay leads to environmental problems, the process depends on the specific type of clay that may be present in the Not easily accessible everywhere.

  3- Extraction method with propane solvent

  Solvent extraction method is currently used in some countries, in most countries propane is used as a solvent but can not remove all contaminants. This process takes place at atmospheric pressure and in the extraction reactor, in which a certain percentage of solvent is added to the reactor and the contaminants are dissolved in propane. Due to the lightness of high propane and insoluble oil, it goes down to The face is extracted separately. In this method, solvents and contaminants enter the distillation tower and propane evaporates and then cools and asphalt materials are obtained.

  Advantages: Solvent is recoverable, does not cause contamination, base oil is produced with relatively good quality.

  Disadvantages: Working at high pressure (10 atmospheres) and ambient temperature (27 ° C) requires sealing of high pressure systems (making expensive and complex systems). ), Is only economical for high-capacity plans, solvent operating conditions require maintenance of highly skilled systems and personnel, due to the use of ex explosion-proof equipment (propane has a risk of fire and explosion) High investment costs, problems Creates an environment.

  5- Vacuum distillation method using dye soil

  In this method, the oil first enters the tray distillation tower and is affected by heat. During this process, all the components of the oil evaporate and water and other materials such as diesel and gasoline from The top of the tower is removed and heavier components of burnt oil such as SN150, SN300 and SN500 are removed from the bottom of the tower. After this stage, the hot oil enters the acidification stage and then enters the bleaching stage and is decolorized by the bleaching soil. It should be noted that since the above method of oil is affected by vacuum, there is no need for very high heat, so in this method compared to the distillation method under atmospheric pressure, the oil structure is less damaged, but still due to the use of concentrated acid and Pigmented soil causes many environmental problems.

  Disadvantages: Environmental problems due to the presence of acidic slug (environmental ban), use of consumables (increased cost), low product quality (high acidity) Oil), low efficiency (less than 65% by volume), high energy consumption

  6- Advanced method of molecular distillation in vacuum (Thin Film Evaporation)

  The process of molecular distillation separation is performed in a short distance under high vacuum conditions with a thin film with low temperature control and without any chemical additives (acid and soil). The base oil produced by this process is in accordance with the standards of the American Petroleum Institute (API) Groups 1 and 2 or ACEA Europe, which is a suitable food for the formulation and formulation of a wide range of engine oils, turbine, hydraulic, gear, grease and Is.

  In this method, the oil first passes through the primary filters to remove its unsaturated contaminants, after this stage to separate light materials including water, diesel and gasoline into the distillation tower under The low-temperature vacuum is then fed into high-vacuum high-pressure vacuum distillation reactors to separate heavy-duty oil materials (less than 0.1 mmHg), where the oil is turned into a thin layer on a hot surface by brooms attached to the rotor. In a matter of seconds, this technique dramatically increases the molecular free pathway and causes the oil to evaporate at low temperatures. At this stage, the oil cuts from SN 100 to SN 500 are evaporated and condensed separately, and after this stage, the slug is separated from the oil with colored compounds and used as bitumen slug for various industries. The output products of this process include base oils of groups 1 and 2, high quality industrial distillation fuel and bitumen slag that can be used in the production of polymer bitumen, asphalt, isogum, etc. It should be noted that in this method, no acid and soil additives are required for bleaching and purification, therefore, in addition to environmental issues, it has a high efficiency.