Corncob use three

Update:06-09-2019
Summary:

Feed yeast raw material Corn cob (rice husk, cottonseed […]

Feed yeast raw material Corn cob (rice husk, cottonseed hull is also available). The yield is absolutely dry weight corncob powder 1000 kg can get dry yeast powder 130 kg. 1000 kg of rice husk, 70 kg of dry yeast powder. 1000 kg of cottonseed hull can get 100 kg of dry yeast powder. Digestible protein 350-450 g / kg. Thiamine hydrochloride (vitamin B1) 13 ~ 18 mg / kg. Riboflavin (vitamin B2) is 26 to 48 mg/kg. Niacin 326 ~ 590 mg / kg. Cold acid 21 ~ 100 mg / kg. Bone alcohol (VD) 10001.U. International unit.
4. Xylitol Xylitol is a sweet substance with high nutritional value, which belongs to polyol. The molecular formula is C5H12O2, which is a white crystal. Soluble in ethanol and water, the sweetness is higher than sucrose, but the calorific value is lower, easy to be absorbed by the human body, does not stimulate the secretion of insulin, does not cause the human blood sugar to rise sharply, is an ideal sweetener for diabetics. Xylitol is an important chemical raw material widely used in leather, plastics, paints, coatings, etc.

The raw materials for xylitol are wide, as long as there are plant fiber wastes with pentose sugar, such as corn cob, bagasse, cottonseed husk, rice husk, camellia shell, birch and other straws, seed hulls, etc. It contains about 20% to 35% polypentaose, such as corn cob 35% ~ 40%, bagasse (or sugar cane pulp) 24% ~ 25%, cottonseed hull 25% ~ 28%, rice husk 16% ~ 22 %, etc., the component is hydrolyzed by acid to obtain xylose, and xylose is hydrogenated to obtain xylitol. 1. Neutralization method Raw materials → pretreatment → hydrolysis → neutralization → decolorization → evaporation → ion exchange → hydrogenation → secondary concentration → crystallization → centrifugal separation → crystal finished product. 2. Ion exchange deacidification method Raw material → pretreatment → hydrolysis → neutralization → evaporation → ion exchange → hydrogenation → hydrogenation → secondary concentration → crystallization → centrifugal separation → crystal finished product. 3. Methanol precipitation method Raw material → pretreatment → hydrolysis → neutralization → evaporation → methanol precipitation → evaporation → xylose crystallization → hydrogenation → secondary concentration → crystallization → centrifugal separation → crystal finished product. The process produces one ton of xylitol, which consumes 10-15 tons of corncob (20-25 tons of bagasse, 15-20 tons of cottonseed), 1 ton of concentrated sulfuric acid, 0.8 tons of soda ash, 0.3 tons of activated carbon and 5 tons of coal.

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