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5/08/2018

What is the method of oil extraction from cottonseed?

Cottonseed oil is obtained as a byproduct of cotton production. Even though the production of cottonseed has fallen significantly since the invention of synthetic fibers, cottonseed oil still has a proportion of the edible oils market. The oil is very rich in unsaturated fatty acids, linoleic acid constituting about two-thirds of these. Compared to other crude vegetable oils, cottonseed oil is hard to refine.

Cottonseed oil extraction plant flow chart:

cottonseed oil extraction plant
 Cottonseed oil extraction plant process

Cleaning: Getting rid of organic impurity, inorganic impurity , oiliness impurity. In this section we use Magnetic Separator, Vibrating Sieve, de-stoner, decorticator.  Through cleaning the impurity, you can reduce the lost of oil & improve the oil yield and the environment of production plant. The material has been produced after pretreatment contains the impurities ≤ 0.1%.

Cracking: Adopting the toothed cracking roller to make the cotton seeds kernel into a right uniform pcs which can keep a moderate block size for squeezing out the oil.

Flaking: To make cracked Cotton seeds kernel pcs into uniform smaller flakes with thickness ≤ 0.5mm, less powder, non-oil spilled, pinching  softly by hand and  the ratio of smaller powder than 1mm sieve mesh is ≤ 10% - -15%.

Cooking: The process is to add the steam into the crushed/flaked seeds pcs, then to dry the seeds for getting rid off more water content. In this process, changing the protein of seeds with the water and temperature to make the oil moleculeo loose for pressing easily to get crude oil also get the better cake and oil. We adopt vertical stack cooker with five layers to cook flakes. Loading full in the 1-2 layers, played the purpose of steaming flakes, and then the temperature reached 95 – 100 degrees,  In 3-5 layers should loaded to shallow, controlled about 40% which could get rid of water from flakes.  The pressure of jacket steam is ≤ 0.6MPa. The temperature and water rate of flakes after cooking is:
Water Content: 12–14 %; Temperature: 95–100 degrees; Requiring Time: 60mins.

Expelling: Matching the modern style cooking oil pressing machine to get more oil, or you can use solvent after pre-pressing by oil expellers to get more oil. Cooking oil solvent extraction machine is the commonly used commercial technique to recover oil from oilseeds.

Refining: In the crude oil contains residue and solid powder, so we have to remove them before packing by cooking oil refining machine.  The residue & solid powder is separated through automatic oil-dreg separator. After separating, we can get two products, one is crude oil with impurity of 1% which will be refined or filtered further by Filtered Press; the other is residue with oil which is conveyed back into Screw Press to repress to get rest oil.  

Features of Cottonseed Oil extraction plant:
  • Wide application for various seeds and nuts;
  • Easy to operate, install and commissioning;
  • Small investment, fewer land space, fewer labor but with the complete function of the production.
  • The semi-continuous can avoid the unstable material feeding caused by manual and can make the worker safety more under the higher temperature working situation.
Company Information:
Henan Doing Mechanical Equipment Co.,ltd is is located in Zhengzhou City,Henan Province, China. Doing Group is an enterprise integrating engineering R&D, equipment manufacturing and installation, project contracting, technical service and international trading. Doing is also a professional leading company in contracting turnkey projects. We focus on the development of new product & new technology and have developed 1-120TPH FFB press process design. Our designing technology and manufacturing ability have reached top level in the world.

If you are interested, welcom to contact us.
Contact: Ms Sophia
Skype: sophia.zang1
Whatsapp: 0086 135 2662 7860
Phone: +86 135 2662 7860
Tel: +86 371 5677 1823
Email: oilmachine@doinggroup.com

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