De-waxing-An Important Process of Edible Oil Refining

Why does edible oil need to be dewaxed?

In the skin, shell and cell walls of vegetable olseeds, such as corn germ oi, sunlower oil, and rice bran oil.there is a certain amount of wax Inthe process of making oil, the wax will enter into the oi. Under the temperature of 30 centigrade, the solubility of the wax in the oi will decreasand the wax willprecipiale and forms crvstals, with the extension oftime these crvstaline arains will gather and amplify the vemetable oiturs cloudy,reducina the transparenoy and causing a certain elfec on the color At the same time the existence of wax wil dearade the smel, lavor, and palatability of the oil, and also reduce the digestion and absorption rate, ecreasing the oil quality and nutritional value. lf theoil turns cloudy when consumers store them at low temperatures, they may mistakenly think the oilis spoled, and the bad smell whencoking may bring the producerinto trouble. As edible oil cals for high level and strict quaity standard,ol producrs are keepimg a watchiuleye on its de-waxing process。

What is dewaxing?

Diferenl veeltable oil and diferent proesing methods resultin dilerent wax ontent 0il de-waxing is separatingthehich meling wax and hioh meling soid fat by cooing andcrystalizalion, and then removin them by fltration or centrifuoal princile. tis a necessary proess for making high-qually salad ol.When fltering wax the trace viscousmaierial oi-soluble peclin and soapstock composlions are altached to the wax crystals which wil olen cause the jams of filter cioth, makina filtering diffou. Therelore thecrude oil should undergo neutralization and bleaching process before de-waxing.

the de-waxina techoloay veople usully refer to indicates wo meaning,one is the separaion of waxes which are esters oflong chain fatly acids and long-chain prmary alcoholsthe otheristhe removal of althe impunies-which contain wax and saturated tri clycerides-producd during storage. in fact. the former should be caed de-waxing and the lalteris winterization, The de-waxed oil can ensure clarity of oil even at lower temperatures.

Does the oil squeezed by the oil press need to be refined?

Cold pressing oil: The cold pressing method is carried out at low temperatures, preserving the natural flavor and color of the oil without damaging the bioactive substances. It usually does not require additives and can be stored for a long time. Cold pressed oil generally does not require refining because it has fewer impurities and can be consumed directly. For example, cold pressed olive oil is a common edible oil that does not require refining.

Hot pressing oil: Although the hot pressing method has a high oil yield, the crude oil has a dark color, high acidity, and contains a lot of impurities such as colloids, phospholipids, and free fatty acids, which can affect the transparency, taste, and stability of the oil. Therefore, hot pressed oil usually needs to be refined to remove these impurities and make it meet edible standards. For example, hot pressed oils such as soybean oil and rapeseed oil usually require steps such as degumming, deacidification, decolorization, deodorization, and dewaxing.

The necessity of refining: The main purpose of refining is to remove impurities from crude oil, such as colloids, phospholipids, free fatty acids, pigments, odors, etc., in order to improve the transparency, stability, and safety of the oil. Refined oil is more suitable for long-term storage and various cooking purposes. For example, the refining process of pressed oil includes steps such as degumming, deacidification, decolorization, and deodorization to ensure that the oil meets national standards.

Spiral oil press achieves continuous oil pressing through spiral extrusion, suitable for cold or hot pressing, and improves oil yield; The hydraulic oil press uses a high-pressure system to extract oil and is suitable for the production of high demand oil products; Refining equipment is used to remove impurities, improve oil transparency and stability, and ensure food safety.

The Signifcance of De-waxing

De-waxing can increase the transparency of ol increase its digestion rate,improve the avor and nutriional vale. eside, de-waxing can improve industrnial utlizaion vale olthe oi.Vegetable wax is an important industrial raw material.It can be used for making an impregnating compound of leather, wood, and pper, poishing paste of cosmelics,hmiture and for aravons wax maner cabo paner eleclical insuaion aint leather shoes oiland lubricanis forhioh- emperalure operalon preision instrmenl etc in foodprocessing industry,vegetable wax can be used in fruit preservatives, while in the medical industry,it can be used for making the packing of a wax-wraped pill.

What kind of edible oil needs to be refined and dewaxed?

Edible oils that require refining and dewaxing usually refer to vegetable oils that are prone to wax precipitation at low temperatures. These waxes can affect the transparency, taste, and stability of edible oils, Therefore, refining equipment is required for dewaxing treatment.

The edible oils that require refining and dewaxing mainly include high wax content vegetable oils, waxy oils, oils that need to improve transparency and taste, oils that need to meet specific standards, oils that need to improve storage stability, oils that need to meet high-end market demand, oils that need to reduce impurities, oils that need to improve processing efficiency, oils that need to meet specific purposes, and oils that need to improve oil palatability. These oil products can improve their quality, stability, and economic value through dewaxing treatment, meeting the needs of different consumers and markets.

Zhengzhou Fude Machinery could provide complete seits of eauipment for de-waxin,incuding maturing tank refriceraling unit refrigeraing medium pump, ol pump, and fiter We also can customize the complete refinery plant for our esteemed customers.