What chemical is used to recycle engine oil into diesel?

Industry News / Date:December 17, 2024

DOING has designed the refining machine that can recycle engine oil into diesel using two chemicals. We call it a waste oil distillation machine. Both of them are very popular throughout the industry, one is to use traditional acid wash and alkali wash chemicals, the other is to use our patented solid catalyst chemicals. The processing capacity of traditional acid wash and alkali wash chemicals distillation machine is 0.1, 0.5, 1, 3, 5, 7, 10, 14tons/day. The processing capacity of patented solid catalyst chemicals distillation machine is 5, 7, 10, 14tons/day. The process of distillation machine to recycle engine oil into diesel flows are as follows.

Engine oil into diesel distillation machineDOING two types of engine oil distillation machine

Process of traditional acid wash and alkali wash chemicals distillation machine

1.Pre-treatment of heat transfer oil

Prepare for the heat transfer oil cycle, start the oil injection pump, and send the oil to the expansion tank. The heat-conducting oil gradually fills the reactor and clay decolorization tank by its own weight through the expansion tube.

2.High temperature heating

The engine oil is pumped into the distillation reactor to heat the heat transfer oil and the bottom of the reactor, converting the engine oil into oil gas while removing some impurities.

3.Condensation into oil

The formed oil gas enters the vertical condenser, condenses into oil, and is stored in a temporary storage tank. The excess oil gas flows from bottom to top to the horizontal condenser, condensing 90% of the oil into the temporary storage tank.

Recycling engine oil into diesel processTraditional acid wash and alkali wash chemicals distillation machine process

4.Acid wash and alkali wash

The oil in the temporary storage tank is pumped into the pickling tank, and after adding acid, it is stirred for 3-4 hours. After settling for half an hour, the oil containing concentrated sulfuric acid is pumped into the alkali washing tank through a pump, and alkali is added.

5.Exhaust gas purification

The non-condensable oil and gas in the condensing system is purified by a water seal and used as fuel to heat the distillation reactor.

6.Decolorization and deodorization

The acid-base balanced oil is pumped into the clay decolorization tank, clay is added and stirred for 1-2 hours, and the clay is filtered through a plate and frame filter and a bag filter. The oil color can be darker or lighter according to customers’ requirements.

7.Fuel gas treatment

The flue gas produced by the heat-conducting oil furnace and the reactor is processed by the desulfurization tower and discharged into the atmosphere after meeting the national emission standards.

For this type traditional acid wash and alkali wash chemicals distillation machine, its advantage is that it is cheap and suitable for customers with relatively low investment budget and who can easily purchase acids and alkalis.

Distillation machine of recycling engine oil into diesel chemicalDOING two types of engine oil into diesel distillation machine comparison

Process of DOING patented solid catalyst chemicals distillation machine

1.Pre-treatment of heat transfer oil

Prepare for the heat transfer oil cycle, start the oil injection pump, and send the heat transfer oil to the catalytic tower, reactor and clay decolorization tank through the expansion pipe by its own weight.

2.High temperature distillation

Start the circulation pump to preheat the heat transfer oil to 250° and start the burner one hour later to volatilize the water and emulsifiable concentrate in the waste oil in the reactor. When the temperature of the reactor continues to be maintained at 380-400 degrees Celsius. The volatilized oil gas passes through the buffer tank and is catalyzed by the catalytic tower. We have two types of catalysts that can be sealed, catalyst A and catalyst B, which is made by our engineers.

3.Condensation into oil

All volatile oil and gas are catalyzed by the catalytic tower and then enter the condensation system to condense into oil.

Recycling engine oil into diesel processDOING patented solid catalyst chemicals distillation machine process

4.Exhaust gas purification

The non-condensable oil and gas in the condensing system is purified by a water seal and used as fuel to heat the distillation reactor.

5.Decolorization and deodorization

Finally, the oil in the oil tank is transported to the decolorization pot, white clay is added and stirred for decolorization, and then the oil fully mixed with the white clay is pumped into the leaf filter to obtain a clearer oil, which is then finely filtered to remove impurities. The oil color can be darker or lighter according to customers’ requirements.

6.Fuel gas treatment

The flue gas produced by the heat-conducting oil furnace and the reactor is processed by the desulfurization tower and discharged into the atmosphere after meeting the national emission standards.

Engine oil into diesel distillation machineThe structure of DOING engine oil into diesel distillation machine

For this type patented solid catalyst chemicals distillation machine, its advantage is that it has higher automation degree and processing efficiency than traditional type, but the cost is higher than traditional type.

Note: For the above two types of engine oil into diesel distillation machine, DOING designs a vertical reactor equipped with an indirect heating system that extends the life of the reactor, making the distillation process fast and efficient. And with the vertical design, the residue can be easily discharged without waiting for cooling.

Engine oil into diesel distillation machineDOING engine oil into diesel distillation machine vertical reactor

In summary, recycling engine oil into diesel is a complex process that can be performed efficiently using traditional acid and caustic wash chemicals or through the innovative use of patented solid catalyst chemicals. DOING is dedicated to designing efficient and environmentally friendly distillation equipment. If you are interested in recycling engine oil into diesel machine, you are welcome to contact us for more information.

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