Cotton Seed Oil Refinery Plant Gossypol Removal Four Stage Refining Line

The Cotton Seed Oil Refinery Plant turns crude cottonseed oil into clear, safe edible oil. Refining removes the phospholipids, free fatty acids, pigments and off flavours present in the crude oil before it is fit for eating, and an oil refining machine of this kind produces first or second grade edible oil. Cottonseed oil is a vegetable oil pressed from the seeds of the cotton plant and is popular for cooking because seed oils are preferred in diets that call for a lower intake of saturated fats.

Crude cottonseed oil is one of the darkest cooking oils and contains gossypol at around one percent together with colloid and waxiness, so it cannot be eaten directly. Eating crude cottonseed oil can damage spermatogenic cells and lead to aspermia and sterility, which makes refining essential. Refined cottonseed oil is usually pale yellow or dark red, and its fatty acid content typically runs to 21.6 to 24.8 percent palmitic acid, 1.9 to 2.4 percent stearic acid, 0.1 percent arachidic acid, 18.0 to 30.7 percent oleic acid and 44.9 to 55.0 percent linoleic acid.

• Four stage refining: degumming, neutralizing, bleaching and deodorization in one integrated line.
• Gossypol removal: the refining process removes the toxic gossypol so the oil becomes safe to eat.
• Hydration degumming: hot water removes gums that can be dried into lecithin or returned to the meal.
• Centrifugal neutralization: alkali converts the fatty acids into soap that is removed in a centrifuge.
• Adsorption bleaching: bleaching earth improves colour and removes the last soap, gum and pigment.
• Vacuum deodorization: high pressure steam strips off all the disagreeable flavours and odours.

The cottonseed oil refinery plant handles crude cottonseed oil from pressing or solvent extraction. Refined cottonseed oil is used as cooking oil and as a blending oil with animal fats, and because the refining steps also remove gossypol, colloid and waxiness the plant is equally suitable for other dark seed oils that need a complete chemical refining line. The same four stage design serves soybean, rapeseed, peanut and sunflower oils.

The refinery plant is shipped in modules with the pots, centrifuges, filters, vacuum system and piping protected and braced for sea transport. We provide the process flow diagram, equipment layout and commissioning service, together with a twelve month warranty on the refining pots, centrifuge, filter and vacuum unit.