Rumays Intl. Trading Co.

Recycled Base Oil

Recycled base oil is used oil that has gone through a filtration process to remove particulates and insoluble contaminants. Filtration eliminates impurities from oil in the form of particle debris. This enables the oil to be reused as fuel or as lubricant in systems.
Recycled base oils are primarily utilized in the production of lubricants and as blenders for other grades. It is the basic oil that goes through the refining and de-waxing process. It is hydrogen treated at the end of the refining process to remove impurities. It is praised for properties such as high solubility, color stability, low volatility and odor, as well as a reasonable viscosity index, low sulphur, and low ash content.

Reconditioned oil is a subset of recycled oil that is produced by combining recycled oil with critical additives to extend the life of the oil. Motor oils and hydraulic oils are frequently recycled and may be used as fuel in a number of heating applications such as boilers and space heaters, as well as in industrial applications such as cement kilns or blast furnaces.

Used oil or waste oil is any sort of mineral oil that is used as a lubricant or heat transmission for production and industrial operations. During the operation, the oil reacts with oxygen and produces unsaturated polar compounds or asphalt.

Moreover, it may also get contaminated by impurities such as dust, fuels, carbon, and metal particles.

Therefore, it loses efficiency for the process. Indeed, most of the oil lubricants in machines lose functionality due to all possible contamination by chemical additives and the byproducts of the operation.

Used oil includes a variety of origins such as:

Industrially used oils: gear oil, engine oil
Emulsions: cutting oil, soluble oil
Clear and transparent oil
Transformer oil
Industrial waste oil and motor oil, also known as the black oil, form the major portion of the used oil.

Recycling Process

How is base oil recycled?

Used oil recycling happens with various methods such as distillation method, acidic method (sulfuric acid), non-acidic method (alkaline – bentonite or dye), centrifugation, and hydrogenation.

First, recyclers purchase burnt oils are from places such as mechanics and the oil changers. Then, they store them in the factory and begin the refining stages.

There are often some contaminations, e.g. water, diesel, heavy metal shavings in the purchased oil, which are separated at first. Steel producers use these metals as scrap feed.  

In simple terms, gear oil recycling includes several steps as below.

  • Separating water and solid particles by sedimentation
  • Sulfuric acid reaction to remove grease, gum
  • Alkaline reaction to neutralize the acid
  • Rinse with water to remove soap
  • Simple distillation to remove moisture and volatile oil
  • decolorizing and absorbing impurities by using clay
  • Filtering to remove the clay and other solid particles
  • Hydrogenation to improve color
  • Blending to specific features

Advantages of Recycled Base Oil:

  • Highly saturated, Low volatility, Low aromatics or impurities
  • Improved demulsibility, Light color
  • Good solubility characteristics
  • Uniform composition, Good oxidation, Color stability
  • High viscosity index
  • Recycled base oil is eco-friendly

The process of production of virgin base oil is energy intensive and it generates higher emissions of carbon while Recycled base oil is eco-friendly generates lower carbon emissions than virgin base oil. Rise in the focus on sustainability of the environment across the globe is providing significant opportunity to the global recycled base oil market.

Oil recycling also benefits the environment. Increased opportunities for consumers to recycle oil lessens the likelihood of used oil being dumped on lands and in waterways. For example, one gallon of motor oil dumped into waterways has the potential to pollute one million gallons of water.

Recycled motor oil can also be distilled into diesel fuel or marine fuel. Motor oil retains its lubrication ability and properties ongoingly and can be recycled again and again for a wide variety of different purposes.

For this reason, recycled oil is positive for the environment, keeping lubricant products within circulation rather than being wasted through disposal or through environmentally detrimental dumping into soil or waterways.

Applications of Recycled Base Oil

Industrial burners, engine oils

  • Rubber process oils and Metal working oils
  • Mold oil to help release products from their molds
  • For Mixing in Bitumen base products
  • Additive in manufactured products like lubricants, transformer oils and high speed spindle machines
  • high speed spindle machines
  • Lubricating Greases
  • Metal processing fluids
  • Hydraulic Oils
  • Transformer Oils

Recycled gear oil is applicable for lubricating electric motors, large industrial chainsaws, old motors in mechanical and industrial machines, and simple devices due to its low price. It is practical in many industrial sites, factories, and some car repair shop.

In some countries, recycled gear oil is extremely popular as fuel supplements.

Base oil Grades – Technical Specifications

Base Stocks created by the aforementioned methods are known as Solvent Neutral Base Oil (SN), SN stands for Solvent Neutral base oil, which is denoted by numbers based on their estimated SUS viscosity at 40°C, such as SN 90, SN150, SN350, SN500, and so on.

SN 150, SN 300 and SN 500 are light in color but the rest is dark. As a general notion, the more viscosity index is, the darker the color will be.

 Base Oil SN 150

30/40 bitumen means penetration grade bitumen type which its penetration is in the range 30 to 40 mm at 25 degree Celsius. Bitumen 30/40 is a hard grade of bitumen. This grade is one of the most used bitumen grades for road construction in tropical areas.

As the hot weather of these regions can be a challenge for mixtures of asphalt, bitumen 30/40 is offered due to its high air blowing and penetration value.

Bitumen grade 30/40 is produced from the vacuum residue in a refinery. 

CharacteristicUnitValueTest method
WhatsApp: (+968) 711 0378
Color ASTM -1.5 – 2.0 D1500
Density at 15°C Kg/L 880D1298
Kinematic Viscosity at 40°C cSt20-35 D445
Kinematic Viscosity at 100°C cSt4.5 – 5.5 D445
Flash Point (COC) °C 180 minD92
Pour Point°C 0 D97
Viscosity Index Typical 95 min D2270
Appearance-Clear & Bright Visual
Total Acid Number mgKOH/g 0.054 ASTM 664
Total Base Number mgKOH/g 0.027 D2896
High Sheer Temperature cp2.10D4741
Noack Wt% 23.8D5800

 Base Oil SN 300

30/40 bitumen means penetration grade bitumen type which its penetration is in the range 30 to 40 mm at 25 degree Celsius. Bitumen 30/40 is a hard grade of bitumen. This grade is one of the most used bitumen grades for road construction in tropical areas.

As the hot weather of these regions can be a challenge for mixtures of asphalt, bitumen 30/40 is offered due to its high air blowing and penetration value.

Bitumen grade 30/40 is produced from the vacuum residue in a refinery. 

CharacteristicUnitValueTest method
WhatsApp: (+968) 711 0378
Color ASTM -1.5 – 2.0 D1500
Density at 15°C Kg/L 0.875 D1298
Kinematic Viscosity at 40°C cSt45.0 - 65.0D445
Kinematic Viscosity at 100°C cSt6.5 - 8.0 D445
Flash Point (COC) °C 210 minD92
Pour Point°C -3D97
Viscosity Index Typical 100D2270
Appearance-Clear & Bright Visual
Total Acid Number mgKOH/g 0.041 ASTM 664
Total Base Number mgKOH/g 0.085 D2896
High Sheer Temperaturecp3. 01 D4741
Noack Wt% 9.2D5800

 Base Oil SN 300

30/40 bitumen means penetration grade bitumen type which its penetration is in the range 30 to 40 mm at 25 degree Celsius. Bitumen 30/40 is a hard grade of bitumen. This grade is one of the most used bitumen grades for road construction in tropical areas.

As the hot weather of these regions can be a challenge for mixtures of asphalt, bitumen 30/40 is offered due to its high air blowing and penetration value.

Bitumen grade 30/40 is produced from the vacuum residue in a refinery. 

CharacteristicUnitValueTest method
WhatsApp: (+968) 711 0378
Color ASTM -1.5 – 2.0 D1500
Density at 15°C Kg/L 0.875 D1298
Kinematic Viscosity at 40°C cSt45.0 - 65.0D445
Kinematic Viscosity at 100°C cSt6.5 - 8.0 D445
Flash Point (COC) °C 210 minD92
Pour Point°C -3D97
Viscosity Index Typical 100D2270
Appearance-Clear & Bright Visual
Total Acid Number mgKOH/g 0.041 ASTM 664
Total Base Number mgKOH/g 0.085 D2896
High Sheer Temperaturecp3. 01 D4741
Noack Wt% 9.2D5800

 Base Oil SN 500

30/40 bitumen means penetration grade bitumen type which its penetration is in the range 30 to 40 mm at 25 degree Celsius. Bitumen 30/40 is a hard grade of bitumen. This grade is one of the most used bitumen grades for road construction in tropical areas.

As the hot weather of these regions can be a challenge for mixtures of asphalt, bitumen 30/40 is offered due to its high air blowing and penetration value.

Bitumen grade 30/40 is produced from the vacuum residue in a refinery. 

CharacteristicUnitValueTest method
WhatsApp: (+968) 711 0378
Color ASTM -2.0 – 2.5 D1500
Density at 15°C Kg/L 0.885D1298
Kinematic Viscosity at 40°C cSt9.5 – 10.5D445
Kinematic Viscosity at 100°C cSt75-80 D445
Flash Point (COC) °C 220 min D92
Pour Point°C -6 to 0 D97
Viscosity Index Typical 95 minD2270
Appearance-Clear & Bright Visual
Total Acid Number mgKOH/g 0.03 ASTM 664
Appearancecp0.15 to 0.25D4741
Noack Wt% 9.2D5800

Packing of Recycled Base Oil

New or used 180 kg drums (Each 20-foot container takes 80 drums.)

  • Flexi tanks

A Flexi-bag, also known as Flexi tank, is a thick bag for conveying containers of non-corrosive and non-hazardous liquids. The maximum tolerable temperature in Flexi tank is +70 °C, and the minimum tolerable temperature is -50 °C.

The best transportation for recycled oil is flexitank. Flexitank has reduced the cost of non-hazardous materials transportation comparing to ISO Tanks and other methods of transportation such as barrels, IBCs, and tankers.

But Easy installation facilitates operation without highly specialized knowledge. The top and bottom valves provide a variety of loading and unloading capabilities. After unloading, the size of the Flexitank shrinks to about one cubic meter by folding, which is equal to 2% of its loaded size.

Types of Flexi tanks

Based on the number of discharge and loading valves and their location, Flexi-bags contain three categories as bellow.

Single valve Flexi tank: loading and unloading valve located on the top

Single valve Flexi tank: loading and unloading valve located at the bottom

Two-valve Flexi tank: the loading valve is on the top, and the discharge valve is at the bottom

Rumays is a market leader and key supplier in the base oil sector, with end-user knowledge. Our company provides the most commonly used grades of Group I, Group II, Group III base oils, Recycled base oils, and Process Oils in various packaging such as steel drums, flex-tanks, IBC tanks, ISO tanks, and so on, with monthly quantities ranging from 20 to 5000 Tons.