canola oil processing
Canola oil, also called rapeseed oil, is generally in deep yellow or brown color. Canola oil contains 0.4-1.0% arachidic acid, 14-19% oleic acid, 12-24% linoleic acid, 31-55% erucic acid, 1-10% linolenic acid, etc. All these unsaturated fatty acids and vitamin E can be absorbed by the human body well, and are good to soften blood vessels and delay senescence. From a nutritional value aspect, as high as 99% rapeseed oil can be absorbed by the human body, and it is good for gallbladder function. Even when the liver is in pathological conditions, rapeseed ketone can be metabolized by the human body normally.
Canola Oil Production
The main producers of canola in the world are European Union, Canada, China, India, and Australia. In these countries and regions, rapeseed oil is the 3rd leading source of vegetable oil, after soybean oil and palm oil. And now there are still investors who want to enter the canola oil production industry.
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What Equipment Is Needed in Canola Oil Production?
For processing canola oil, we need canola oil seed, suction vibrating screen, magnetic separator, demineralizer, flaking machine, steam cooking machine, filtering machine, extractor, evapo-separated machine, steam drying machine, stripping tower, etc.
Canola Oil Production Line
There are mainly 2 methods for canola oil production: pressing method and extracting method.
In recent years, oil extraction method develops fast, which is based on organic solvent extraction principle and can significantly increase oil yield. Advanced pre-pressing & extraction method include flaking, steam cooking, pre-pressing and solvent extraction, that is, to press 18% to 19% oil by oil press, then the pre-pressed oil cake is processed by solvent extraction, so that the oil residue of dry oil cake can be decreased to 2% to 3%.
From the perspective of return on investment, production projects with an output of more than 30 tons/day are suitable for the pre-expression leaching method. If the output is 1-10 tons/day, the cost of oil production by pretreatment and pressing method will be lower. The equipment used in the two production methods is also different.
The oil yield of pre-pressing & extraction method is much higher than sole pressing method, but the canola oil produced by pre-pressing & extraction method contains lipid peroxide, colloid and isothiocyanate that can affect oil taste and quality. Besides, it also contains free fatty acid that influences canola oil storage. Therefore, most canola oil manufacturers still adopt screw oil pressing method.
Common screw oil presses produce 4-6kg less rapeseed oil per 100kg rapeseed than extraction method, and the crude oil quality is poor. For improving oil yield, canola oil processing must adopts high pressure and steam cooking temperature. ABC oil press is designed with advanced technology that it’s quite suitable for processing canola oil.
Canola oil processing
Pre-treatment:The aim is to improve oil seeds shape, so that the oil is pressed from oil seeds fast. Main purposes: 1. Give oil seeds certain plasticity; 2. Reduce refined oil stickiness; 3. Bind protein; 4. Remove oil seeds biological activity; 5. Detoxify.
- Cleaning: good pre-treatment begins from cleaning, which is to remove the sand, stone, stem, leaf, etc. from canola oil seed. Seed cleaning is quite important, it can on one hand assure product quality (oil and cake), on the other hand prevent wearing of pre-treatment equipments.
- Heat treatment, that is steam cooking: heat treatment is one way to increase canola seed oil yield; it is also an important procedure in oil plant.
Canola oil pressing:
as canola oil seed is different from other oil seeds, the worm and barrel of canola oil press shall be different. In production, the worm is required to present sawtooth shape curve and cone, which is benefit for fully destroy the molecules of oil seeds and produce oil to the largest extent.
Canola oil refining:
Both the canola oil obtained by pre-pressing or the canola oil obtained by leaching contains trace impurities. In order to obtain high-standard edible oil and make the storage time of the edible oil longer, we also need to refine the crude oil.
Rapeseed oil (Canola Oil) refining mainly include hydration, alkali refining, bleaching and deodorization process, etc.
- Hydration means to remove or recycle the hydrophilic phospholipid from rapeseed oil, also called dephosphorization.
- Alkali refining is to purify crude canola oil, which is to add caustic soda solution to the crude oil, and then use centrifuge for separation.
- Decolorization is to decrease pigment content of rapeseed oil to the required level, it mainly utilizes certain amount of clay to mix with heated oil under nitrogen environment, then decolorize in decolorization tank.
- Deodorization is to destroy peroxides in oil, remove aldehyde, ketone or other air oxidation generated odorous substances that are more easily volatile, and can damage the instable carotene to lighten canola oil color.
Video of Canola Oil Production Line Working
There are three common refining equipment: batch refining equipment, semi-continuous refining equipment and full continuous refining equipment. Depending on the output, the budget, and the requirements for refined oil, the choice of refining equipment is naturally different. ABC Machinery engineers can equip you with corresponding refining equipment according to output and requirements.
This is a brief introduction to canola oil production methods and equipment. If you need canola oil production equipment, please leave us a message below.