Views: 0 Author: Site Editor Publish Time: 2024-02-06 Origin: Site
Potassium carbonate, white crystalline powder. Density 2.428g/cm3. Melting point of 891 ℃, decomposition at boiling point, relative molecular weight of 138.21. Soluble in water, the aqueous solution is alkaline, insoluble in ethanol, acetone, and ether. Strong hygroscopicity, can absorb carbon dioxide and water when exposed to air, and transform into potassium bicarbonate. It should be sealed and packaged. Hydrates include monohydrate, dihydrate, and trihydrate. Potassium carbonate aqueous solution is alkaline. Insoluble in ethanol and ether.
According to China's "Hygienic Standards for the Use of Food Additives" (GB2760-2014), it can be added to wheat flour products, infant and toddler products, and noodle products, with a limit of 60.0g/kg for noodle products. Usually, it is added appropriately when making noodles and Wonton, which can give the product unique flavor, color and toughness (often used together with sodium carbonate, etc.).
Potassium carbonate can be used in glass, printing and dyeing, soap, enamel, preparation of potassium salts, synthesis of ammonia decarbonylation, and also in the color television industry. It is mainly used as a leavening agent in food.
Mainly used for analyzing reagents. Such as high-purity analysis, emission spectroscopy analysis, etc. It can also be used as a flux for silicates and insoluble sulfates, as a water absorbent for organic liquids, and in industries such as electroplating, fertilizers, and photography.
Used in glass, printing and dyeing, soap, enamel, preparation of potassium salts, synthesis of ammonia decarboxylation, color television industry, and as a leavening agent in food; Used as gas adsorbent, dry powder fire extinguishing agent, rubber anti-aging agent, etc; Used for the processing of exposed photosensitive materials.
Used in the manufacturing of electronic industry picture tube glass shells, decarbonization in fertilizer production, potassium salt manufacturing, as analytical reagents and fluxes, and also in the preparation of various potassium salts; Used as a flux for analyzing reagents, reference reagents, and molten silicates and insoluble sulfates.
Using desiccants in chemical experiments. Its water absorption capacity is moderate, and it can form potassium carbonate (K2CO3 · 2H2O) with two crystalline waters, but it reacts slowly with water. Suitable for drying neutral organic compounds such as alcohols and esters, as well as general alkaline organic compounds such as amines and alkaloids. But it cannot be used as a desiccant for acids, phenols, or other acidic substances.
Alkaline agents and dough improvers, and can inhibit the sourness of noodles, can be used in noodle food, and can be used in moderation according to production needs. Used for producing optical glass, it can improve glass transparency, strength, and refractive index.