Advantages of using hexane as extraction solvent to make cooking oil

Solvent extraction technology is continuous cooking oil extraction plant, which utilizes solubility of n-hexane and oil, enhances oil yeild by steeping and spraying. Solvent extraction technology can be used in extracting oil from most oil seeds. Pre-pressing and solvent extraction method is used in high oil content oil seeds, such as rapeseed, peanut, cottonseed, sesame, etc, while direct solven extraction method is used to low oil content oil seeds.

Loop type extractor sprays n-hexane on the oil seeds cakes

The main advantages of using n-hexane as extraction solvent to make cooking oil is low oil residual. Besides, there are eight pieces of advantages as following:

1. In the detection of the final edible oil products, the content of sulfur and benzene in n-hexane is very low, almost undetectable, and more in line with international sanitary testing standards.

2. The distillation range of n-hexane is 63 °C-71 °C, and the dissolution rate is small.

3. Due to the low recovery temperature, the energy-saving effect of n-hexane is obvious. And it has great benefits for the improvement of oil quality, and the color will be better. The acid value and peroxide in the oil can be lowered, thereby increasing the yield of refining.

4. The content of n-hexane is increased, and the extraction ability is enhanced, thereby also improving the processing capability of the device.

5. N-hexane has better compatibility with oil and fat, which can reduce the amount of residual oil in the cake. Improve the production of oil and fat, and increase the efficiency of enterprises.

6. Using n-hexane can reduce the drying temperature in the recycling of the cake, reduce the supply of direct steam, thereby reducing the dust intrusion of the condensation recovery system. Extends the life cycle of the condenser.

7. Due to the extremely low sulfur content in n-hexane, the corrosion of the system is reduced and the service life of the equipment is prolonged.

8. Reducing the operating system temperature after using hexane can reduce the reduction crystallization of unstable substances in plants and improve the use of the whole system.

From the above describtion, it can be seen that the use of n-hexane in vegetable oil plants is the best choice, and it is also the reason that why solvent extraction plant is more and more popular among big scale vegetable oil production factory.

The engineers of Henan Doing Company suggest that above 30tpd capacity, solvent extraction plant is the best project solution. Because for pressing method, oil residue is above 5%, while for solvent extraction method, oil residue would be less than 1%. And meal derived from solvent extraction can be widely used in raw food material with high protein content and excellent quality because of low temperature.

Henan Doing Mechanical Equipment Co,. Ltd. has been concentrated in solvent extraction machine for over 40 years. And Henan Doing can offer whole line of cooking oil production line with turnkey service. (Learn more: cooking oil solvent extraction plant)