Refined cottonseed oil is generally orange-yellow or brown. The fatty acid contains palmitic acid 21.6-24.8%, stearic acid 1.9-2.4%, arachidic acid 0-0.1%, oleic acid 18.0-30.7%, and linoleic acid 44.9-55.0%. The refined cotton clear oil removes toxic substances such as gossypol and can be used for human consumption. Cotton clear oil contains a large amount of essential fatty acids for the human body, and it is most suitable to be mixed with animal fat for consumption, because the content of linoleic acid in cotton clear oil is particularly high, which can effectively inhibit the rise of cholesterol in the blood and maintain human health. The human body’s absorption rate of cotton oil is 98%.
Cottonseed oil is also the main cooking oil. However, wool cotton oil contains gossypol (content about 1%), gum and wax (content varies depending on the hull content of the oil-making cotton embryo), which is of poor quality and is not suitable for direct consumption. Its refining process is also more complicated.
Henan Taixing cottonseed oil processing equipment realizes the integrated flow operation of dephosphorization, degumming, deacidification, dehydration and decolorization, thus realizing the miniaturization of large-scale oil refining and the civilian use of industrial oil refining. For oil users, refined oil can be directly filled and sold
1. Crude cotton oil refining process (continuous)
lye soft water
Filter crude oil—→Preheat—→Oil-alkali ratio—→Mixed reaction—→Desoap—→wash—→dehydrate—→dry—→cotton clear oil
Soap Foot Wastewater
Operating conditions: the impurity content of the filtered crude oil is not more than 0.2%, the lye concentration is 20-28°Bé, the excess alkali is 10%-25% of the theoretical alkali, the desoaping temperature is 70-95°C, the amount of drum rinse water added is 25～1001/h, oil inlet pressure 0.1～0.3 MPa, oil outlet back pressure 0.1～0.3 MPa, washing temperature 85～90℃, washing water addition amount is 10%～15% of oil volume, dehydration back pressure 0.15 MPa, the drying temperature is not less than 90°C, the absolute operating pressure is 4.0kPa, and the product oil filtration temperature is not higher than 70°C.
2, refined edible oil refining process
phosphoric acid lye soapstock lye
↓ ↓ ↑ ↓
Filter crude oil—→preheat—→mix—→oil-alkali ratio—→mix reaction—→desoap—→mix
Filter←—Distillation deodorization←—Filtration←—Adsorption decolorization←—Dehydration←—Washing←—Desoaping
↓ ↓ ↓ ↑ ↓ ↑ ↓
Refined cooking oil, water vapor, waste clay, adsorbent, waste water, soft water, soap stock
Operation points: the operating conditions before alkali refining are the same as crude oil refining, the concentration of re-refining lye is 6-12°Bé, the addition amount is 1%-3% of the oil volume, the re-refining temperature is 70-90℃, and the oil back pressure is 0.15 MPa. The operating conditions of washing, decolorization, and deodorization are similar to those of peanut oil refined edible oil. If degreasing is performed after deodorization, the grade of the refined oil is refined refrigerated table oil (salad oil). The process flow after the deodorization process is:
┌→ soft fat
Deodorized cotton oil—→cooling and crystallization—→cultivating crystal—→filter—┤
└→ Cold meal oil
The refined cottonseed oil can be eaten with confidence!