Cottonseed Oil production

Cottonseed contains gossypol, which requires high-moisture steaming or puffing in the pretreatment process to reduce the content of gossypol in the crude oil and improve the quality of the crude cotton seeds oil. Cottonseed contains 39-52% shell and 48-61% kernel. The shell contains 0.3~1% oil. The cotton kernel contains 30-35% oil and 35-38% protein. Cottonseed contains 0.8 to 1.3% gossypol. The traditional cottonseed oil production process is pre-pressing, extraction, or pressing. Since cottonseed has a high shell content and contains gossypol, it is necessary to peel the shells and use high-moisture steaming and frying during the pre-treatment process to reduce the gossypol content in cottonseed oil.

The pre-pressing and extraction method produces cottonseed oil and cottonseed crude oil refining.The pretreatment steps mainly include cleaning, shelling and crushing, steaming and frying, and pressing.Cottonseed oil refining can remove peptidic impurities, free fatty acids, pigments, odors and other impurities in cot- tonseed oil, and improve the stability of cottonseed oil.

The processing and production
process of cottonseed oil

Cottonseed Oil Production Line
cottonseed oil processing flow

PRODUCTION PROCESS

The process of pressing cottonseed into cottonseed oil mainly includes cottonseed pretreatment, pressing, and extraction.

COTTONSEED OIL REFINING

STEP1

Degumming and hydration

The colloidal impurities in crude oil are mainly phosphorus. The presence of colloids such as phospholipids not only reduces the quality of oil but also promotes transitional emulsification between oil and alkali in the alkali refining deacidification process, increasing the difficulty.

STEP2

Deacidification

Oil deacidification mainly removes free fatty acids in crude oil, as well as a small amount of colloids, pigments, and trace metal substances in the oil.

STEP3

Decolorization

The color of the oil and some other impurities must be decolorized to meet product quality standards. At the same time, it provides more favorable conditions for deodorization and refining. Decolorization must meet the final required color index of the product.

STEP4

Deodorization

The decolorized oil is sucked into the deodorization tank from the vacuum. When the vacuum degree reaches 755mmHg and the temperature is above 150℃, open the bottom to directly steam to start distillation and deodorization, and start timing.

Cottonseed Oil Production Video

Cottonseed oil processing plant

The traditional cottonseed oil production process is pre-pressing, extraction, or pressing. Since cottonseed has a high shell content and contains gossypol, it is necessary to peel the shells and use high-moisture steaming and frying during the pre-treatment process to reduce the gossypol content in cottonseed oil.

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