What are the common extraction methods of extracting peanut oil in peanut oil processing process?

During peanut oil processing process, the most widely used extraction methods for commercial or industrial use are solvent extraction method and mechanical pressing method. These two methods have the characteristics of high extraction rate and high production efficiency. Next I will guide you learn about these two extraction methods one by one.

The first extraction method: Pressing method (mechanical pressing method)

Peanut oil pressing, also called mechanical pressing method, refers to the use of mechanical forces to squeeze oil out of peanut. The mechanical oil pressing method uses the power which is generated from the gradual reduction of the volume between the squeezed screw and the pressing chamber, as well as the power generated by the friction between the material and the machine to extrude the oil inside pretreated peanut. The peanut oil pressing method belongs to purely physical squeezing oil producing technology, the whole pressing process does not add any additives, which ensures that the extracted peanut oil can be ate directly.To make the peanuts reach the best pressing state, we usually need to use a series of pretreatment machines, like: cleaning machine, crushing machine, softening machine, flaking machine, cooking machine and so on.

Recommended reading: Peanut oil processing plant

Peanut oil pretreatment and pressing machine

Although the peanut pretreatment machine is necessary, the peanut oil press machine is also important. As the core equipment of the peanut oil pressing production line, peanut oil press machine plays a huge role in the whole peanut oil pressing process. According to the different processing capacity of customers, there are usually 4 kinds of peanut oil press machine for people to choose, they are: large screw peanut oil press machine, small screw peanut oil press machine, hydraulic peanut oil press machine, integrated peanut oil press machine.

Large screw peanut oil press machine - suitable for large scale peanut oil manufacturing plant.

Small screw peanut oil press machine - suitable for medium and Small scale groundnut oil production line;

Hydraulic peanut oil press machine and integrated peanut oil press machine - suitable for family workshop or small scale edible oil press production line.

Integrated peanut oil press machine

The second extraction method: Solvent extraction method

The solvent extraction technology is a widely used technique in cooking oil processing process. It is a chemical procedure for extracting oil from the oilseeds material and press cake using a solvent, and usually, Hexane is preferred. The workflow of peanut oil solvent extraction plant including extracting, desolventizing, evaporating and stripping, condensing and recovering. First, using organic solvents to extract oil from press peanut cake inside oil extractor, then we can get mixed oil and wet meal. Second, the mixed oil will pass through three evaporators to make solvent inside transform into gas, and organic solvents will be recovered for reuse. After evaporated, we will get crude peanut oil ready for oil refining. Third, the wet meal will be delivered to desolventizer-toaster to dry and be separated with organic solvent. The dry meal will be packaged for sale as animal feed. Usually, by using the peanut oil extraction method, the residual oil in the cake will be less than 1%. But different with peanut oil pressing method is that peanut oil obtained by solvent extraction method must be refined before it can be eaten.

But because of the peanut oil solvent extraction plant 's processing capacity is large and the price is expensive, this extraction method is not suitable for household and small scale cooking oil production business.

Peanut oil solvent extraction plant

As a professional manufacturer of peanut oil processing machine, Henan Glory Company can supply various kinds of cooking oil processing machine to meet customer's production needs. So whatever production capacity you need, we all can supply the most suitable edible oil processing plant project solution for you, welcome to contact us at any time.