cotton seed oil mill project report

The world cottonseed yield ranks only second to soybean in all oil crops. However, cotton seed oil ranks 5th in all edible oils, since about 16% of the cotton seed is used as feed. The whole cottonseed contains 15% ~25% of oil, while its kernel contains 32% ~ 46% oil and 30%protein, so it is an important resource of edible oil and vegetable protein. Cotton seed oil contains 60% ~ 90% of unsaturated fatty acids (linoleic acid and oleic acid), which has the functions lowering cholesterol, preventing atherosclerosis, etc. It is an also important kind of edible vegetable oil. (Related post: Vegetable Oil Production Business Plan >>)

Start Business in Cotton Oil Mill
Start Business in Cotton Oil Mill

Starting an cotton seed oil extraction plant to produce high quality edible cotton seed oil has being a hottest project in many countries, like China, India, United States, Pakistan, Uzbekistan, Brazil, Turkmenistan, Afganistan, etc..

30tpd cotton seeds oil refinery plant afghanistan
30tpd cotton seeds oil refinery plant afghanistan

For people who really want to enter cotton seed oil industry, there are a lot of things they should know. The top concern about setting up cotton seed oil mill plant is the project cost. But, the investment and working capital for a complete cottonseed oil manufacturing plant is decided by many factors, such as capacity, equipment type, oil processing methods, raw material price, local and international market demand, etc.. The exact cost should be based on actual conditions. (Read more: Oil Mill Project Cost in Pakistan >>)

how to start your own production line with best business plan

ABC Machinery is an expertise in cotton seed oil processing, if you have any questions about establishing cotton seed oil plant, just describe your requirements clearly to us, and our engineers then will get back to you quickly!

Cotton Seed Oil Production Method and Process

The production of cottonseed oil has 3 methods: mechanical screw oil pressing, pre-pressing & solvent extraction, and direct solvent extraction.

Cotton Seed Oil Pressing Machine
Cotton Seed Oil Pressing Machine
Cotton Seed Oil Extraction Machine
Cotton Seed Oil Extraction Machine

Technology Flowchart of Cotton Seed Oil Production
Cotton seed → Delinting → Shelling → Flaking → Extrusion → Extraction → Mixed Oil → Steaming (mixed oil concentration 65-70%) → Acid reaction → Alkali reaction → Heating → Centrifugal separation → Twice steaming → steam stripping → Cottonseed oil neutralization → Decolorization → Deodorization → Refined cottonseed oil

  • Screw Oil Pressing

Cotton seed oil pressing mainly rose in 1960s when cottonseed oil was pressed by small batch type cold oil press machine and sold in the form of crude oil. This kind of crude oil does not go through heat treatment, so it contains large quantity of free gossypol, which would cause male infertility if directly consumed. Therefore, it was banned to directly consume crude cottonseed oil. Crude cottonseed oil should be refined to remove unhealthy and useless substances. Screw oil pressing method is more widely adopted by mini or small scale cotton seed oil production line since it can totally meet the demands for small scale cotton seed oil production and requires less investment cost. (Read more: Small Scale Oil Mill Plant Project >>)

  • Pre-pressing & Solvent Extraction

Pre-pressing & solvent extraction method is a common oil extraction method at present, and this method is also applied to other high oil content materials. The latest progress of cottonseed oil processing technology is the use of the extruder. The extruded material then goes through solvent extraction, which simplifies processing technology, and reduces the loss of solvent, reduces residual oil in meal, and improves the feeding property of cottonseed meal. The   extracted oil meal contains 0.10% to 0.20% free gossypol, which is only half of the pre-pressed cottonseed material.

  • Oil Refining

The crude cottonseed oil contains about 2% or more gossypol, phospholipids, fatty acids and other non glyceride composition that affect the flavor and sensory index; therefore, it must go through degumming, deacidification, bleaching and deodorization process to achieve food standards. Commonly used refining methods are: traditional chemical alkali refining process and the mixed oil refining process. Oil Refining Process is a very important step in cottonseed oil production, which directly affects the quality, yield and consumption of oil. Different oil refining technologies have different results.

Setup Cotton Seed Oil Mill Plant Project

Small Oil Mill Plant for Cotton Seed Oil
Small Oil Mill Plant for Cotton Seed Oil  
Cotton Seed Oil Pressing Pant
Cotton Seed Oil Pressing Pant
Cotton Oil Extraction Plant
Cotton Oil Extraction Plant

Latest Post: Cotton Seed Oil Processing Machines

We boast strong capacity to built cotton seed oil manufacturing plant project, from 5TPD to 500TPD. In these years, we have built many oil mill plant project around the world. So, our professional installation team and engineers can help you quickly solve the problems during the construction of your factory.

If you are also interested in setting up your own cotton seed oil mill plant, we can offer complete services, including machine and process selection, equipment manufacturing, installation and commissioning, etc. In addition, the equipment involved in cotton seed oil production process is all supplied by our factory, so there are no more extra expenditures, you can get high quality equipment at factory price!

Cotton Seed Oil Quality Index

Index Estimated Value
FFA 0.06%
Colloid 0.05%
Insoluble impurities 0.05%
Moisture and volatile matter 0.02%
Color (25.4mm groove) Y 36. R3.1
Saponified matter content 82mg/kg
Free gossypol 96.5mg/kg

Cotton Seed Oil Refining Technology

The traditional alkali refining process is based on the cotton seed oil as raw material, and through twice neutralization and alkali refining to get light color neutralized oil; but this process needs high consumption and the oil color cannot reach standards. Mixed oil refining use the extracted mixed cotton seed oil for evaporation and alkali refining, which can increase oil yield, improve oil color and leave out conventional alkali refining washing steps. Since 1960s, mixed oil refining technology has become the most commonly used method of cottonseed oil refining in the United States and other western countries, since it eliminates the deacidification of crude cottonseed oil. Its color is lighter than conventional neutralized cottonseed oil, which is conducive to subsequent processing.

Cotton Seed Oil- Refinery
Cottonseed Oil Refining Plant

Cottonseed mixed oil refining is to degum and deacidify the mixed oil (the mixture of solvent and oil) gained from the first vaporization system in cotton seed extraction technology before it is not totally evaporated and desolventized, and before its viscosity and density are lower than crude oil. As there is no high-temperature exsolution, the gossypol or other pigments contained in mixed oil are not yet fully fixed and easy for removal. The specific gravities of mixed oil and soap stock have great difference, which can reduce the neutral oil in soap stock, and at the same time easy to separate from soap, so that the handling capacity is increased.

As this cotton seed oil refining technology is to deacidify the mixture of oils and solvents, therefore all devices must be sealed and explosion-proof, and must be constructed inside the solvent extraction plant. In order to prevent the solvent gas leakage from bringing safety hazard, usually the centrifugal machine adopts nitrogen seal design, so that its internal is filled with nitrogen and isolate from oxygen to improve safety.

The key point of mixed cottonseed oil refining is to control the concentration of cottonseed oil mixture. The best concentration is 65% ~ 70%: the acid-base concentration and the added quantity can be determined by raw material phospholipid content and free fatty acid content. the alkali solution concentration used in mixed oil alkali refining is lower than that used in conventional alkali refining, generally 11% ~ 14%; The reaction temperature cannot exceed the boiling point of the solvent, control at 55~ 60℃; acid reaction time is generally 15~ 20 min, alkali reaction time is relatively longer, general control at 1~ 2h. All the parameters can be adjusted according to the actual color of the oil.

Mixed Cottonseed Oil Refining Technology Advantages

Compared with the traditional chemical method of alkali oil refining, mixed oil refining are more favorable for cotton seed oil mill project due to its various advantages:
  • The cotton seed oil color produced by this refined technology is better than the conventional alkali refined cottonseed oil.
  • Mixed oil refining does not need to be washed, which does not need centrifuge and auxiliary facilities.
  • As the mixed oil is not easy to emulsify in alkali refining, so soap is not easy to take away the oil, in consequence the oil yield is high.
  • The mixed oil refining removes colloid, pigments and other impurities, reduces the loss in evaporation process.
  • The same as conventional refining, soap stock is added to the oil meal in evapo-separated machine, which can recycle the solvent in soapstock, while at the same time increase the use value of meal.
  • The cotton seed oil from mixed oil refining reaches the Nation 3rd Grade standard (China), which can be directly put into the market; the refined oil after decolorization and deodorization can reach National 1st Grade Standard (China).

The combination use of the cottonseed extrusion, oil extraction and the mixed oil refining process can make the production of our cottonseed oil plant reach 500 t/d. The extrusion & extraction technology can improve the oil yield and reduce the solvent loss. Firstly, the mixed oil refining technology eliminates the conventional washing process in alkali refining, which not only saves water, but also reduces the wastewater discharge capacity of 40 m3/d. Secondly, this technology dephenolizes from raw oil extraction, and the decolorization and deodorization can enhance dephenolization effect. Thirdly, this technology moves deacidification to solvent extraction process, which can greatly simplifies cottonseed oil making technology, decreases construction area and production cost. This oil making technology can also be applied to rapeseed oil and rice bran oil.  

30TPD Cotton Seeds Oil Refinery Plant Video

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