CEO Agrifood co.,ltd. Has three extraction methods according to usage and application, Solvent Extraction, Supercritical Extraction and Cold Pressed Extraction.
1. Solvent Extraction
Use both white rice bran and parboiled rice bran as our raw materials. Hot steam is using as our main energy and food grade solvent is used for extracting rice oil out of the rice bran.
As shown, the production starts from raw materials and move to preparation department. Using hot steam is to stabilize acid value and to cook rice bran before passing prepared rice bran to the extractor. Extraction process uses food grade solvent to separate rice oil from the bran. From this step, Misela will go through distillation process to evaporate solvent out of the rice oil while Defatted rice bran move to the toaster to dissolvent before the finished rice bran are packed into bags.
2. Supercritical Extraction
Supercritical Extraction is the process of separating one component (the extractant) from another (the matrix) by either stripping unwanted material from a product (e.g. decaffeination) or collecting a desired product (e.g. essential oils). Supercritical method is becoming an important commercial and industrial solvent due to its role in chemical extraction in addition to its low toxicity and environmental impact.
The relatively low temperature and the stability of the process also allow most compounds to be extracted with little damage or denaturing. In addition, the solubility of many extracted compounds vary with pressure, permitting selective extractions. Therefore, Supercritical Extraction method suitable for skin care products and supplements.
3. Cold-Press Extraction
Cold pressed oil is oil produced through a combination of grinding and low heat. Many types of fruits, seeds, and vegetables can be used to make it, but not all cooking oils go through this process. For dressings and dishes in which the flavor of the oil will play an important role, it is generally superior to other cooking additives. When it is heated through cooking, consumers should be more concerned with the smoking point of the individual ingredient used, since some cold pressed oils can’t handle high heat.
These generally shouldn’t be used in cooking anyway, since the delicate and complex flavor will disappear. Therefore, most cold pressed oils are suitable for skin care products and some organic products.
Refining Processing or refinery processing removes the components of edible oils which may have negative effects on taste, stability, appearance or nutritional value. To the extent possible, processing should preserve the antioxidants, vitamins and vital fatty acids and prevent unwanted changes within the oil. At CEO, we design our refinery to allow various refining techniques to transform our crude rice bran oil into applicable, useful, safe and nutritious products for each client. There are four refining possibilities that is available for our customers.
The physical refining process is the most popular process for edible rice bran oil at industrial scale. This process removes rice bran gum, wax and excessive fatty acids from crude oil without using alkali in the process. The process involves bleaching to reduce the level of pigments such as carotenoids and chlorophyll and deodorization (steam stripping) to reduce the level of free fatty acids and to remove odours, off-flavours and other volatile components. The oil is of high quality and there is environmental advantages to this process.
Chemical refining is the conventional method used in past centuries. The main purpose of chemical refining is to saponify the FFA by an alkaline solution and dilute the resulting soaps in a water phase. These soaps are removed by separators. For small scale batch processes static separation is used but for continuous processing and large scale processes, centrifugal separation is used. The neutral oils are subsequently bleached and deodorised.
The benefit of using enzymes as auxiliary agents in degumming vegetable oils is that it reduces total oil loss in the degumming process. The outcoming gum can be used to produce food or feed grade lecithin.
The process breaks down heavy molecules of impurities and moisture in the crude oil using vacuum distillation technique that is eco-friendly and nonacidic. However, it can only done in small batches and not scale competitive.