Peanut Oil Production Line

Peanut is a kind of oilseed with high oil content. The oil can be obtained from peanuts by pressing process.

Peanut oil contains more than 80% unsaturated fatty acids (including 41.2% oleic acid and 37.6% linoleic acid). Besides, there are also palmitic acid, stearic acid, and other saturated fatty acids which cover 19.9%. The fatty acid composition of peanut oil is relatively good, therefore it is easy for human bodies to digest and absorb. Thus, the peanut oil production industry is a large and highly developed business.

Peanut Oil Production Line

The Process of Peanut Pretreatment

The peanut pretreatment processes include cleaning and separating of hull & kernels. According to pressing temperature, there are two peanut oil pressing technologies: hot pressing and cold pressing.

Peanut Oil Pressing Process
  • Feeding Stage
  • Main Pressing Stage
  • Cake Forming Stage

Peanut Oil Pressing Process

The peanut pressing processes can be divided into three stages, which are the feeding stage, the main pressing stage, and the cake forming stage. The most common peanut oil pressing machine is the screw oil press.

Hot pressing is the traditional method of pressing peanut oil. With a high rate of oil output, good taste, and convenient storage, it is popular for home use. However, because of the high production temperature, the peanut protein is usually severely denatured and loses plenty of nutrients.

Cold pressing technology is often applied in large peanut oil production plants. The production temperature is conducted under 60℃, which is beneficial to preserve the nutrients and comprehensively utilize peanut protein in peanut oil. The disadvantage is low oil yield, not suitable for small oil plants.

The pressed peanut meal cakes can be used as animal feed, or the residual oil can be further extracted through the extraction process.


Peanut Oil Refining Process

After a long period of precipitation, the crude peanut oil can be filtered by a filter and sent to a refining plant. The pressed cake can be crushed and sent to an extraction plant for secondary extraction, extraction oil is refined and sold as ordinary oil.

Refining is to remove impurities, odors, and pigments from peanut oil and improve the quality and taste of the oil. The refining process mainly includes steps such as degumming, deacidification, decolorization, and deodorization.

Peanut oil refining process1
Peanut oil refining process2

Degumming mainly removes phospholipids and other colloidal substances from peanut oil. By heating and adding chemical reagents, colloidal substances such as phospholipids are aggregated into larger particles, which are then removed by centrifugation or filtration.

The purpose of deacidification is to reduce the free fatty acid content in peanut oil. Alkaline refining or distillation is usually used for deacidification. The alkali refining method is to add an appropriate amount of alkali solution to neutralize the free fatty acids to generate soap stock and glycerol, and then remove the soap stock through centrifugation or filtration.

Decolorization mainly removes pigments from peanut oil to make the color of the oil clearer. The adsorption decolorization method is usually used, that is, adsorbents such as activated carbon are used to absorb pigments and other impurities in the oil.

The purpose of deodorization is to remove odors and volatile substances from peanut oil and improve the taste and stability of the oil. Deodorization usually uses high-temperature vacuum distillation, under high temperature and vacuum conditions, the odor components in peanut oil are volatilized and removed through condensation collection.

During the deacidification and deodorization process, free fatty acids and low molecular weight substances are distilled out under high-temperature vacuum and direct steam conditions. The physical refining deodorization temperature is higher than the conventional temperature. Generally around 260 degrees. During the operation, attention should be paid to rapid temperature rise, balancing the flow of the inlet to be deodorized and the finished oil, and strictly controlling the deodorization time, etc. This is directly related to the technological level of oil refining equipment.

The refined peanut oil is cooled, filled, and sealed through automated packaging equipment for storage and sale.

Peanut oil refining process3
Automatic peanut oil production line
  • Improve Production Efficiency
  • Ensure Product Quality
  • Meet Market Demands

Fully Automatic Production Line

The fully automatic peanut oil production line is a production line that integrates the latest technology and intelligent technology, aiming to improve production efficiency, ensure product quality, and meet market demand. The production line adopts fully automatic control, realizing full automation from the peanut raw materials entering the factory to the finished products leaving the factory, greatly reducing manual intervention and operating errors.


Peanut Oil Production Video

Peanut kernel oil making

The complete modern new peanut oil production line includes pretreatment equipment, pressing equipment, and refining equipment. The specific price needs to be determined based on the daily processing volume.


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