Soybean, a leguminous soybean, is native to China and cultivated all over the world. Its plant is 3~9 cm high, its stem is stout, erect, densely covered with brown bristles, its leaves usually have 3 leaflets, its stipules are veined, it is yellow pilose, and its petiole is 2~2 cm long. The total pedicel usually has 5~8 sessile, crowded flowers, the calyx is lanceolate and the flowers are purple, lavender or white. Pods are fat, slightly curved, drooping, yellow-green, densely covered with brown-yellow long hair; 2~5 seeds, oval and nearly spherical.

eating

soybean can process bean products such as tofu, soybean milk and yuba, and can also extract soybean isoflavones. Among them, fermented bean products include fermented bean curd, stinky tofu, bean paste, soy sauce, lobster sauce, natto and so on. Non-fermented bean products include water bean curd, dried bean curd (1 pages), bean sprouts, marinated bean products, fried bean products, smoked bean products, fried marinated bean products, frozen bean products and dried bean products. In addition, bean flour is a high-protein food instead of meat, which can be made into a variety of foods, including baby food.

Feed

After extracting human edible oil from soybean, the by-product is soybean cake, which is a high-quality protein feed. It is a high-quality protein feed for ruminants such as chickens, pigs, cows and beef cattle. Among them, soybean cake refers to the residual cake after soybean is pressed and deoiled, which is round after hydraulic pressure and thin after spiral oil pressing. When used as feed, it needs to be broken before it can be used. Because it is fragrant after crushing, domestic animals are very fond of eating.

Industrial

Soybean oil: Soybean oil produced by soybean processing is one of the important edible oils, which belongs to semi-drying oil and is a good vegetable oil. It is an important source of unsaturated fatty acids in human body, which can reduce cholesterol, and also has adjuvant therapeutic effect on hypertension and cardiovascular diseases. Refined soybean oil formed by refining soybean oil is mainly used for food. After deep processing, soybean oil can produce the following products or provide important raw materials for them.

soybean lecithin: beneficial to the development of human nervous system; It is widely used in confectionery industry, medicine, paper making and leather making.

shortening and margarine: used in food processing industry.

Stearic acid: Soybean is the main source of high-purity stearic acid, which is mainly used to make food emulsifier, ore flotation agent, soap and candles.

glycerol is an important raw material for gunpowder, medicine and paper making.

paint: a tough paint made by mixing soybean oil with tung oil or linseed oil, which is used for outdoor painting.

car painting: made of soybean oil, with excellent texture, natural color and no oxidation by sunlight.

oxidized soybean oil: made from soybean, which can replace lubricating oil by improving its specific gravity and viscosity, and can be used in automobiles, ships and machinery. Advanced lubricating oil made with fish oil can be used for aircraft.

other products: soybean oil mixed with alcohol can be used to make artificial rubber, liquid fuel, porcelain glaze, printing ink, polyvinyl chloride, resin, etc.

many important products can be made from the leftovers of soybean oil pressing, such as phospholipids used in food industry and cheap sterol hormone raw materials obtained from stigmasterol and sitosterol for pharmaceutical industry.