What is The Process of Making Palm Oil?
As the vegetable oil variety with the highest production volume, consumption volume, and international trade volume in the world, palm oil is collectively referred to as one of the “World’s Three Major Vegetable Oils,” alongside soybean oil and rapeseed oil. Palm oil is produced by pressing the palm fruit; the fruit pulp and the kernel yield palm oil and palm kernel oil, respectively, though the traditional concept of “palm oil” typically refers only to the former. So, what exactly does the production process of palm oil entail? This article will provide a comprehensive breakdown of the complete production workflow—from the raw palm fruit to the finished oil product.
Overview of the Palm Oil Production Process
The production workflow for palm oil primarily consists of three major stages: pressing, refining, and fractionation. The pressing stage involves extracting palm oil from the palm fruit; the refining stage involves further processing the palm oil to remove impurities; and the fractionation stage involves deep processing of the palm oil to extend its shelf life and enhance its clarity. The entire process—from the harvesting of mature oil palm fruit to the final packaged oil—typically includes steps such as sterilization, threshing, digesting, pressing, deacidification, decolorization, deodorization, fractionation, drying, and packaging.
The Palm Oil Pressing Stage: From Fresh Fruit to Crude Oil
The pressing stage is the first step in the entire palm oil production process and serves as the critical link that determines both the yield and the quality of the oil.
1) Raw Material Reception
First, the bunches of palm fruit are weighed to facilitate financial settlement and subsequent cost accounting for processing. After being screened to remove impurities, the fruit bunches are transferred into palm oil sterilization tanks. It is crucial to note that the time elapsed between harvesting and sterilization should not be excessive, as delays can lead to the rancidity of the palm fruit, thereby compromising the quality of the resulting palm oil.
2) Sterilization Stage
Sterilization is a vital heat treatment process within the palm oil production workflow. The pulp and kernels of mature oil palm fruit are rich in lipase enzymes, which can spontaneously degrade the fats within the fruit, leading to an increase in free fatty acids. Sterilization not only softens the fruit—making it easier to loosen and detach from the fruit bunches—but also effectively inhibits lipase activity, thereby preventing the generation of free fatty acids and preserving the quality of the oil. Currently, the most common industrial sterilization method involves treatment with saturated steam at 140°C for 75 to 90 minutes.
3) Fruit Threshing Section
Following the sterilization treatment, the palm fruits are separated from the empty fruit bunches through a process of vibration, impact, and screening performed by palm oil threshing machine. The empty fruit bunches can be recycled for use as fertilizer or fuel. Huatai’s independently developed shaftless fruit stripper offers lower costs and higher stripping efficiency compared to conventional fruit strippers.
4) Digesting Section
The palm fruits are mashed into a paste-like consistency through the stirring and squeezing action of palm oil digester; this process helps accelerate the efficiency of the subsequent palm oil pressing stage.
5) Pressing Section
The digested palm fruits undergo continuous spiral extrusion within a palm oil press to yield crude palm oil, along with a mixture of palm nuts and fibers.
In this core stage, Huatai’s patented product—the palm fruit oil press—boasts a processing capacity ranging from 10-1000 tons per day, with an oil residue rate in the press cake of only 6%. This product series is controlled via a PLC system, features a hydraulic system for regulating cake discharge, and utilizes high-strength spiral shafts and press cages that ensure a long service life and stable equipment operation.
6) Filtration and Palm Kernel Recovery
The extracted crude palm oil passes through a plate-and-frame filter press to remove impurities before proceeding to the next palm processing stage; meanwhile, the mixture of palm nuts and fibers is fed into a fiber separation system to isolate the palm kernels for recovery and storage.
Palm Oil Refining Section: From Crude Oil to High-Quality Edible Oil
Due to its specific chemical properties, crude palm oil is prone to spontaneous hydrolysis, which generates significant amounts of free fatty acids and causes its acid value to rise rapidly; therefore, timely refining is essential. The primary objective of palm oil refining process is to remove free fatty acids, natural pigments, and odors from the crude oil to produce high-quality refined palm oil.
The palm oil refining machine adopted by Huatai is as follows: Crude Palm Oil → Drying Section → Decolorization Section → Physical Deacidification & Deodorization Section → Fractionation Section → Refined Oil Product.
Palm Oil Fractionation Section: Precise Separation to Meet Diverse Demands
Fats and oils are composed of triglycerides with varying melting points; fractionation is the process of separating the solid fractions (stearin) from the liquid fractions (olein)—which possess different melting points—at specific temperatures. Different applications impose varying requirements regarding the stearin and olein content of palm oil: the olein content influences the oil’s oxidative stability—the lower the olein content, the longer the product’s shelf life; conversely, the stearin content affects the oil’s clarity—the higher the stearin content, the cloudier the oil appears.
Huatai possesses extensive technical expertise and a deep accumulation of knowledge in the field of palm oil fractionation. Leveraging in-depth research into the melting point differentials of palm oil triglycerides, Huatai’s palm oil fractionation equipment enables the highly efficient separation of palm stearin and olein, achieving product purity and yield rates that rank among the highest internationally. The separated olein (liquid palm oil) can be sold on the market, while the stearin (solid palm oil) can serve as a substitute for cocoa butter and margarine ingredients.
Henan Huatai Cereals & Oils Machinery Co., Ltd.— A Leader in Palm Oil Processing Equipment
Henan Huatai Cereals & Oils Machinery Co., Ltd. traces its origins back to the Huaxian County Grain Machinery Factory in Henan Province; since its inception in 1988, the company has accumulated over 38 years of manufacturing experience. The company occupies a site of 100,000 square meters, houses 12 intelligent workshops, and employs over 380 staff members. With 12 overseas offices established globally, its business operations span more than 70 countries and regions worldwide.
In recent years, Huatai has achieved remarkable success in the export of palm oil processing equipment. Representative projects include: a complete 45-ton/hour palm fruit oil pressing plant customized for a client in Cameroon; a complete 100-ton/day palm oil refining and fractionation plant delivered to the Democratic Republic of the Congo; a 100-ton/day palm oil fractionation project tailor-made for a client in Pakistan, which filled a technological gap in the local market; and a 50-ton/day palm oil refining and fractionation project completed in Peru, which achieved successful trial runs on the first attempt—producing high-quality oil with minimal resource consumption—and earned high praise from the client.
Conclusion
The production of palm oil involves a series of precise processes—including sterilization, pressing, refining, and fractionation—wherein every stage plays a decisive role in determining the final quality of the oil. Leveraging over 38 of accumulated technical expertise, comprehensive R&D and manufacturing capabilities spanning the entire industry chain, and extensive project experience across the globe, Henan Huatai Cereals & Oils Machinery Co., Ltd. has established itself as an industry benchmark in the field of palm oil processing equipment. If you have requirements for palm oil production line equipment, we invite you to contact us to learn more about our products and services.
Website: https://palmoilmachine.com/
Email: info06@cnoilmachine.com
