Groundnut Oil Production Process

Groundnut oil production process, based on mechanical pressing technology, can be divided into three steps: oilseed preparation, pressing and crude oil refining. (Read more about Groundnut Oil Processing Machine>>)

The oilseed requires undergoing a thorough cleaning process to remove sand, stalk, plant debris and any other foreign matters by rotary or table sieve. Usually, the screening process is assisted by cleaning sieve. Post cleaning, the seeds have to be prepared for efficient oil recovery by pressing. The stages involved are size reduction of the seeds by breaking them and then conditioning the seeds by adjusting their moisture content and temperature, while keeping the seeds hot (say 90-95oc) for a period of 30-60 minute. Then the prepared seed shall be conveyed to the screw oil press machine where it is pressed by the action of worm and outer shell. The crude oil so obtained from the pressing will be first clarified in a settling tank and then shall be pumped through the oil filter machine.
refining groundnut oil
The filtered crude groundnut oil will be pumped to the edible refinery machinery where it shall pass through three stages of refining: neutralization, bleaching and deodorization.

Neutralization : To reduce the level of free fatty acid (FFA) in the oil, caustic soda is mixed with the crude oil and the mixture is fed to a hydration tank. The neutralized oil may have trace of soap which is a by-product of the neutralization process. Therefore, the oil will be washed with water.

Bleaching: The neutralized oil is then pumped to the bleacher in which it is mixed with bleaching earth to improve the color of oil by the process called adsorption. At this stage, any undesirable impurities from the crude Groundnut oil are removed. This process improves the initial taste, final flavour and oxidative stability of the product. The bleached oil is then filtered to remove the bleaching earth leaving the oil with very low phosphorous levels and no soap.

Deodorization :  The bleached oil, after being filtered, will be pumped to the deodorizer to avoid substances which are responsible for the odor of edible oil.

Posted in Oil Refinery Process | Comments Off

Easy Way to Shell Seeds With Sunflower Dehulling Machine

The sunflower dehulling machine is specially designed for sunflower dehulling and kernel husk separation in the oil milling plant.The huller works by means of extrusion, shearing, twisting and tearing of the paired rolls. The kernel husk separator works by means of vibrating screens and air currents according to different bulk densities and sizes of the husks and kernels.

After cleaning, oilseeds such as sunflower seeds are conveyed to the seed dehulling equipment to separate the kernels. KMEC’s sunflower dehulling machines adopt a unique seed dehuller and are controlled by frequency conversion technology. Sunflower seeds which remain unhulled are recycled within the equipment until properly dehulled. The efficiency of the dehuller is about 95 to 98 percent, with the rate of broken kernels at 2 to 5 percent.

seed dehulling machine
What exactly is sunflower dehulling machine?

Sunflower dehulling machine hulling machine could possibly be identified as Disc Huller, it’s used with dehulling oilseed shells like peanut inshell, cotton seed, apart from that this type of seed hulling machine could also be used to grind oilseed like peanut, soybean and so forth.

Features of the sunflower dehulling machine

Compact yet with a high capacity, easy to manage and less labor intensive. Utilizes a special plate screen with a reduced frequency of sceen replacement to improve the efficiency of production. The paired rolls, made of new material ADI castings, have been treated via a special process for durability. By adopting a multiple vertical air current process, circulation has been improved.

Sunflower Dehulling Machine Technical Data:

  •     Capacity: huller: 100t/d(24h)
  •     kernel husk separator: 50t/d(24h)
  •     Husk separation rate: 90~98%(water content: 2~10%).
  •     Rate of husk in kernel: 1~4%

If you’re interested in our products or have any questions, please let us know. Don’t hesitate to contact us!  Email:

Posted in Oil Pretreatment | Comments Off

Essential Oil Extraction Methods

During the Middle Ages, people developed techniques for extracting oil from aromatic plants, such as cloves, and herbs like rosemary, according to the National Cancer Institute. These oils contain components that make fragrances, natural and homeopathic treatments, and aromatherapy preparations. Simply crushing the leaves and stems yields a small amount of oil from some plants. Some fragile plant and aromatic substances require more complex extraction methods. The oil yield and composition also varies depending on the oil extraction method.


Distillation is one of the oldest methods of extracting essential oils from plants and flowers. The process usually requires immersion of a plant substance—flowers, leaves or stems—in water, then heating up the container. When the water reaches a temperature that is high enough to produce steam, the pores of the plant open enough to release the essential oil. In some cases, the extraction process only exposes the plant parts to steam. The distiller collects the plant’s oil from the vapor that rises to the top of the container. As the vapor cools and condenses, the oil drips into a collection vessel inside the container. Distillation by this method results in chemical alteration of the plant’s properties and the fragrance of the essential oil produced.


oil extraction plant

Expression extraction releases the essential oils in citrus fruits. Scraping the outer skin of oranges, lemons and grapefruit ruptures a sac that holds the oil. Expression extraction does not use heat to release these oils because they are dispersed in the air. Expression requires a scraper or grater and a collection container into which the oils from the sacs drip when squeezed or pressed. These oils remain chemically identical to the oils found in the carrier fruits, and the smell is usually unchanged.

Supercritical Solvents

The use of solvents to extract essential oils from plants and resins is a modern technique that increases the yield of oil from many plants. Carbon dioxide, or CO2, is a popular solvent for essential oil extraction, according to the University of Minnesota. This method also retains the original chemical structure of the oil and extracts additional compounds from the plant material that distillation and expression do not produce. The process is more expensive but highly efficient. It takes place in a closed chamber because the extraction process requires heating the CO2 and increasing the pressure in the chamber to convert the CO2 to the supercritical state that makes it a solvent, according to the website AltMD.

Posted in Oil Extraction Process | Comments Off

Process Description of Edible oil Refinery

For Batch refining the oil, there are three basic processes in the refinery. First process is neutralizing the oil in the neutralizer to eliminate the Free Fatty Acids (FFA) by putting caustic soda. Oil is heated up to about 60 Centigrade by thermic fluid coils and oil is stirred by stirrer. The soap stock will form because of the chemical reaction and then settle dowm to the bottom of the neutralizer and then will be moved to the soap span.

Neutralized oil is drawn into the second vessel called bleacher where color of oil is eliminated by bleaching process with aid of chemicals such as carbon black and bleaching earth. Oil is generally heated up to 110 Centigrade by thermic fluid coils. Stirring is also continued. Bleaching process is done under vacuum.

vegetable Oil Refinery Plant
Then bleached oil flows to the filter press where bleaching earth and chemicals are separated and then clean bleached oil will be drawn to deodorizer where oil is heated above 110 Centigrade through thermic fluid coils and then live steam is given to the oil from the bottom steam nozzles and temperature of oil is raised up to 200 to 220 Centigrade through thermic fluid coils. The entire process happens under high vacuum. The odor of the oil will be removed. Then it goes to cooler where water circulating coils take away heat and oil is cooled. Again it goes to second filter press where completely refined and transparent color less oil is obtained.

In the refining process, Thermic Fluid Boiler, Vacuum Pump, Barometric Condenser, Catchols, Steam Generator have their particular roles.These equipments are connected with the vessels through pipelines as part of the refinery.

Posted in Oil Refinery Process | Comments Off

Oil Refinery Plant Used in Biomass Oil Production

When comes to the problem of energy and environment crisis, all the countries in the world are facing with the problem on the same level. The movie has 2 opinions on biomass fuel: 1, the biomass fuel product might not be safe, it could cause other environmental problems. 2, the biomass fuel has great potential in improving the structure of fuels now.

The comedy movie Lost in Thailand was a box office success in China market during the Spring Festival, then the movie was shown abroad, but it didn’t end up even close as it did in China, critics explains that Chinese way of humorous is quite different and not always be accepted by the foreigner, mostly it is about the culture difference.

China has been enjoying the fast speed of developing and suffering from the way-labor intensive and large fuel consumption amount industries, the unusual weather conditions showed up frequently each year has brought up the discussion among the people, and Chinese government, the same as the other responsible government in other countries, is planning to accelerate the speed of industry transformation progress. In the meeting of NPC and CPPCC which was hold the last few days, one representative said that 10 billion tons of agriculture and forest wastes are created each year in China, and 60% of them were burned in the open air by the farmers, the biomass fuel raw materials are used to pollute the environment, which is not wise.

High quality biomass oil product mainly comes from 2 resources: the waste edible oil recycle and refinery and the bio-ethanol made from crops (mainly corn) and none food (fiber). Oil refinery plant can help improve the oil quality, the only problem now is to reduce the cost technically, we should keep trying until the technology is mature.

Posted in Uncategorized | Comments Off

Choosing the Best Oil Mill for Commercial Soybean Oil Extraction

In Europe people know them as Soya beans, in America, it is different, and people know them as Soybeans. It is in the class of oil seeds, it produces so much protein per acre. The leading nations in production of the soybeans are United States of America, China, Argentina, India and Brazil.

Soybean Oil Extraction PlantThe soybean seed has nineteen percent oil. It also contains thirty-five percent proteins, and their commercial viability has made some people start soybean crushing industries. The major products that the crushing industries look for are the soybean crude oil and soybean meal, after the crushing, the oil undergoes refining and degumming. The refined oil then goes through bleaching, after which temporary hydrogenation is applied on it. The oil then undergoes deodorization. Soybean oil extraction is not complete without the important winterization stage that prevents it from clouding during cold times.

The winterization stage also helps in making a diversity of soybean oil products, for example, cooking oil and margarine. The main fats and oils have five classes, edible vegetable oils, animal fats, palm oils, industrial oils and marine oils. Soybean oil is by far the world’s most popular oil put under use than all other plant oils, yet soybeans contain lesser oil than most plant seeds. What makes soybean oil more competitive is the low cost of its production in the industries, the supply of the soybeans is higher than its oil processing, which makes the production cost lower than other plant oils in the industries.

So how is soybean extraction done? It is not an overly complicated process. It requires the best machinery. The most commonly used process is the solvent extraction process. At first the soybean are pressed for the initial production of oil. In addition, the soybean cakes are taken to the solvent chamber where more oil is extracted using the solvent extraction method. The most important thing here is to but the right oil mill especially when you are going into business.

Posted in Soybean Oil Extraction | Comments Off

An Outlook on Olive Oil Processing

For many years in the world’s history, Olive Oil Processing has been one economical activity of many people in the world across. Many methods have been put into place for production of olive oil in the past years but the ‘Sinolea Method’ is the most commonly used. This method has extensively been used since it results into softer and fuller flavors with excellent characteristics. Unlike the labor extensive methods of olive oil processing that may take a lot of time, this method ensures that the olives are pressed at the peak of their freshness.

Olive Oil Processing is relatively simple and for this reason, it has been used in the Mediterranean region for many decades. However, that applies for household production of olive oil but commercial production can be somewhat complex. That notwithstanding, the basic principle in the process is crushing the olives for release of the oil inside. The entire process can be used for oil extraction in other grains such as grains and nuts.

After picking, there is no time to be wasted, the fruits are taken to an olive mill immediately, before acidity rises in the fruits. This will be undesirable because it would affect the quality and flavor of the fruits’ finished product.

olive oil processingThe next activity once the olives have been brought to the mill is to eliminate leaves, branches and any other impurities that can be handpicked. These are passed through a cleaner that rids of fine leaves, twigs and dirt to remain with pure olives. Olive Oil Processing mostly involves facilities with flush surfaces to ensure hygiene and safety of the finished product. Preferably, an olive oil processing plant should have stainless steel build for high quality and flavorful products.

Three processes are involved in the production of olive oil. One is the oil milling where the initial extraction of olive oil occurs and then the olive oil cake is formed. The second one is the oil refinery where the production and processing of non-consumable oil happens. Finally, there is the plant processing where the oil is fully processed from the oil cake. This is the final step.

Posted in Olive Oil Processing | Comments Off

Steps in the oil refinery process

The oil refinery process is largely dependent on the type of seed from which the oil is being extracted, and whether the final product will be edible or not. Most of the refining process that takes place in oil milling plants is that of edible oil, which makes it important for plant owners to know the steps involved. Crude oil that is refined to become edible oil is taken from oil mills as well as solvent plants and processed in oil refinery plants specially made for vegetable oils. The main reason for the oil refinery process is to remove unpleasant odor and other factors that are undesirable so that the oil has uniformity of color and is of high quality.

When refining edible oil there are a number of steps that need to be followed with the first one being distillation. During distillation, the oil is heated until the chemical solvents that were used in extraction evaporate. The next step is degumming which involves the removal of gums as well as solvents that can dissolve in oil, by passing water that is hot throughout the oil to remove impurities. The third step is neutralization where the oil is treated using sodium hydroxide to remove waxes, fatty acids, pigments among others.

Equipment for Oil RefiningBleaching is another step which is done using high-activity clay removes components that are “off-colored” from the oil. The clarity of the oil, especially those that will be refrigerated is done through a step known as dewaxing. Deodorizing involves the evaporation of compounds that are unstable by using steam that is of high pressure in treatment. Edible oils also need to be preserved and this step involves the use of BHA or BHT. Finally, filtration is the last step which helps remove large impurities but without the use of chemicals.

Posted in Oil Refinery Process | Comments Off

Palm oil production process

Palm oil is used in a variety of ways and is always in demand in areas such as cosmetics, food production, cleaning agents as well as an edible oil. The oil that is extracted from palm fruits is not edible at first and needs to go through a number of processes in order to be refined. The refining ensures that if there are any byproducts remaining in the oil, they are eliminated thus leaving it pure. The extraction of palm oil is not as simple as what is witnessed when extracting oil from seeds and other materials that bear oil.

Soybean Oil Refining ProcessesThe process that the palm fruits are put through to be able to extract as much oil as possible begins with sorting. Here, the palm fruits that are not of the required quality are separated from the rest and disposed. The palm fruits that are of good quality are taken to the processing plant and are taken to another stage known as the conveyer system. At this stage the fruits are split into pieces that are much smaller before they are ushered into a cage where they are sterilized. The sterilization process removes any impurities making them ready for the rest of the production process. After sterilization, they are moved onto the threshing drum where the flesh is separated from the husks, then moved to the digesters. They are eventually placed in the presser where the extraction of the oil takes place but in a crude form.

The crude oil is then clarified and then dried before it goes through the palm oil refinery process. The process ensures that there are no impurities in the palm oil and it can now be used in many ways without the fear of infection because of any type of contamination.
Palm Oil Extraction System

Posted in Oil Refinery Process, Uncategorized | Comments Off

Using the Seed Press Machine at Home or Business

A seed press machine is a tool that is used to press the oils out various seeds and the oils from these seeds can be used for edible reasons or as topical medicines for your skin and hair. The benefit of the seed press machine is that you get to retain the nutrients from the seeds. If you have leftover fruit or vegetable seeds that you did not plant in the ground, you can recycle those seeds by putting them in the machine to extract oils.

Oil Press MachineGood for Making Homemade Essential Oils
If you plan to operate a business that specializes in selling homemade essential oils, you should consider an industrial seed press machine because this type of machine is a good way to extract fragrant and healthy oils to produce for customers. If you need a large-scale industrial seed press machine, you can visit local suppliers of these machines and compare features and prices. Online machine suppliers may also sell this machine at an affordable price.

Excellent for Homemade Sauces
If you are tired of purchasing store-bought tomato pasta sauces that do not taste homemade, you can purchase some tomatoes, take the seeds out of the tomatoes and prepare homemade tomato sauce with the tomato oil from the seed press machine. If you get better at this skill, this hobby can become a business.

The seed press machine is an excellent way t get the natural oils and nutrients from various nuts, fruits and vegetables without having to buy the oils for a high price in the store.

Posted in Seed Press Machine | Comments Off