How is glycerin made?How to purify?
Release time:
2024-03-26
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Abstract
Pure glycerin is a foamy liquid with no color and sweet taste. Glycerin is a ternary alcohol with the general physical properties of ternary alcohol compounds. It can participate in many chemical changes and be converted into various compounds.
Because of its many unique chemical and physical properties, glycerin is used as a chemical raw material by many. Glycerin is used in the production and manufacture of anti-corrosion coatings, paints, plastics, sodium cyanide glycerin, vegetable oils and liquid paraffins. It is also used in the pharmaceutical industry, skin care products, spices, daily necessities and other industrial production.
Glycerin is used in the chemical industry to make propylene oxide, modified materials, polyester polyols, urea-formaldehyde resins, etc.; In the food industry as a sweetener, water retention agent, dehumidifier and organic solvent for cigarettes; in the pharmaceutical industry as a lubricating fluid; glycerin is used in national defense science and technology as a raw material for nitrifying gunpowder glycerin, an anti-cold agent for natural materials for airports and vehicles; and in the Japanese industry for the production and manufacture of whitening toothpastes and fragrances.
In addition, glycerin is also widely used in the paper industry, leather products, glass stickers, and textile industries.The key new main use of glycerin is as a component in methacrylate, which is used to produce polyurethane plastic foams.Glycerol is used as a substance and additive in the manufacture of polymer compounds when individual molecules are aggregated.
Among them, the preparation method of the above-mentioned yield absorber of glycerin includes: after 10 parts of sodium-based bentonite and 1 part of porcelain soil are cultured and burned at 850℃ by mass for 4h, the water is released and dispersed evenly, and then 30 parts of aluminum dihydrogen phosphate with a SiO2 component of 35wt%, 5 parts of carbon nano-particle hard template and 0.5 parts of sodium hydroxide solution are added. After ultrasonic dispersion for 1.5h, the glycerin is placed in a closed vessel and the temperature is raised to 160℃ to carry out a hydrothermal reaction, the reaction speed is 9h, and the hydrolysate is removed after refrigeration. , Cleaned, dried, and milled to a particle size ≤100 mesh to obtain the above-mentioned yield absorber;
The preparation method of glycerin includes: adding glucose water to deionized water and stirring evenly to obtain an aqueous glucose solution with a concentration value of 0.4mol/L, and then placing the aqueous glucose solution in a polytetrafluoroethylene reaction tank to heat and mix to obtain the reaction solution, the heating temperature is 200℃, and the mixing time is 5h; Glycerin After the reaction solution is cooled to room temperature, the precipitation is obtained by centrifugation, and the precipitated tap water and ethyl acetate are cleaned until they are basically colorless, and the carbon nano-particle hard template is obtained after being dried in a drying box at 100℃ for 6h.
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