Potassium carbonate, including industrial potassium carbonate and agricultural potassium carbonate. It is generally called potassium carbonate, which is industrial potassium carbonate. Potassium sulfate is mixed with pulverized coal and lime, and then reduced and roasted to obtain black ash (containing potassium carbonate, calcium sulfide and other burned products). After leaching, filtering, evaporation, and carbonization, potassium bicarbonate is obtained, which is then filtered and calcined. Get the product. Or the potassium hydroxide solution obtained by electrolysis of potassium chloride is carbonized with carbon dioxide in a carbonization tower. Evaporate and filter through a multi-effect evaporator to obtain potassium bicarbonate, which is then calcined to obtain the product. This method is widely used because of its easy availability of raw materials, high potassium utilization rate, and no production of three wastes, but it consumes more electricity. Because of its high production cost, the content is generally in the range of 96% to 99%.
Agricultural potassium carbonate is different from chemical potassium fertilizers such as potassium sulfate, potassium nitrate, potassium chloride, and potassium dihydrogen phosphate. It is extracted from plants. Its physical and chemical properties are thermal, quick-acting, and physiologically alkaline fertilizers. It also contains plant bionic and stress-resistance factors, and has good soil disinfection and sterilization effects and the prevention and control of underground pests. Moreover, it can also increase soil temperature, neutralize soil acidity, and enable crops to grow in a suitable soil pH environment. Its carbonate roots are raw materials for plant photosynthesis and can loosen the soil. Supplement potassium nutrition and replenish various medium and trace elements (calcium, magnesium, silicon, boron, iron, zinc, copper, manganese, molybdenum, selenium, etc.) removed from the soil due to the harvest of crop seeds. It contains almost all kinds of mineral elements contained in plants, and its nutrients are all water-soluble and quick-acting. It is a rare new variety of potassium fertilizer in agricultural production. Domestically, due to restrictions on raw material sources, it cannot be put into industrial mass production. The content of agricultural potassium carbonate (K2CO3) produced in Indonesia can be as high as more than 50%.
Industrial potassium carbonate is colorless or white hexagonal or orthorhombic crystal or granular powder. Relative density 2.662, transformation point 588 ℃, melting point 1069 ℃, boiling point 1689 ℃. Soluble in water (12G/100ML at 25 ℃, 24.1G/100ML at 100 ℃), insoluble in alcohol, acetone and carbon disulfide. It has a bitter and salty taste. It is a raw material for the production of electron tubes, television picture tubes, and computer monitor glass shells. It can be used to produce optical glass to improve transparency, strength and refractive index. It is also used in the production of electric welding rods to prevent arc breakage during welding. It is the raw material for food additives potassium sorbate, potassium dihydrogen phosphate and other products. It can be used as foliar spray fertilizer and as raw material for compound fertilizer. It can also be used to produce vat dyes and whitening of ice dyeing. Used as an absorbent to remove hydrogen sulfide and carbon dioxide. Mixed with soda ash, it can be used as dry powder fire extinguishing agent. It can also be used as an auxiliary raw material for acetone and alcohol production and as an anti-aging agent in rubber production. The aqueous solution can be used for scouring cotton and degreasing wool. In addition, it is also used in the production of inks, photographic chemicals, polyester, explosives, electroplating, tanning, ceramics, building materials, crystal and medicine. It is used as an additive in the production of instant noodles and carbonated drinks to play the role of leavening and preservative.
Agricultural potassium carbonate is extracted from plants and is a loose-textured thermal quick-acting fertilizer. Contains 50% potassium carbonate, more than 35% potassium oxide, and 18.8% carbonate. It also contains effective water-soluble nutrients such as phosphorus, calcium, iron, magnesium, silicon, boron, zinc, iron and other trace elements. Among them, potassium can promote nitrogen metabolism and the synthesis and transportation of sugars in plants, which can promote the growth of plants and enhance their ability to resist diseases, pests and natural disasters. In addition, it can also improve drought resistance; carbonate is the key to crop photosynthesis. Nutrients can promote and enhance photosynthesis of plants. Agricultural potassium carbonate has a wide range of uses in forest and fruit production.
Long-term application of chemical potassium fertilizers, such as potassium sulfate, potassium chloride, potassium nitrate, etc., will have adverse effects on the physical and chemical properties of the soil, such as soil hardening and acidification. Agricultural potassium carbonate is extracted from plant combustion ash. It is physiologically alkaline and can neutralize soil acidity. It also contains various mineral elements (medium and trace elements) contained in plants. It can not only supplement soil potassium nutrition, but also provide Fruit trees supplement calcium, magnesium, boron, zinc, iron, molybdenum, silicon and other medium and trace elements. The carbonate ions in potassium carbonate are also the raw materials for crop photosynthesis. Therefore, agricultural potassium carbonate is a rare new variety of agricultural potassium fertilizer and should be vigorously promoted.
Domestic manufacturers
Yantai Lefeng Soil Fertilizer Technology Development Co., Ltd.
Weifang Liwei Soil Disinfection Service Co., Ltd.
Keywords: Agricultural Potassium Carbonate
