Potassium Sulfate Industrial Grade

Potassium sulfate is a salt composed of sulfate ions and potassium ions, usually in the form of colorless or white crystals, granules or powder.Odorless, bitter taste.Hard.Chemically inactive.Stable in air.Density 2.66g/cm3.Melting point 1069 ℃.The aqueous solution is neutral, with a pH of about 7 at room temperature. 1 g is dissolved in 8.3 ml of water, 4 ml of boiling water, and 75 ml of glycerol, but insoluble in ethanol.

The main uses are serum protein biochemical test, catalyst for Kjeldahl nitrogen determination, preparation of other potassium salts, fertilizers, medicines, preparation of glass, alum, etc.

Basic information

Chemical properties

Metathesis reaction: It can react with soluble barium salt solution to form barium sulfate precipitate.

Function and use

It is the basic raw material for the manufacture of various potassium salts such as potassium carbonate and potassium persulfate.The glass industry is used as a precipitation agent.The dye industry is used as an intermediate.The perfume industry is used as an auxiliary agent, etc.The pharmaceutical industry is also used as a laxative and so on.Potassium sulfate is a commonly used potash fertilizer in agriculture, with a potassium oxide content of 50%. It is commonly known as "Bai Jiali" in Taiwan.In addition, potassium sulfate is also used in glass, dyes, fragrances, medicine and so on in industry.

Hazard terminology

1. Do not inhale dust.

2. Avoid contact with skin and eyes.

Agricultural application

Potassium sulfate is a colorless crystal, with low hygroscopicity, not easy to agglomerate, good physical properties and convenient application. It is a good water-soluble potassium fertilizer.Potassium sulfate is also a chemically neutral, physiologically acidic fertilizer.Potassium sulfate is a chlorine-free, high-quality and high-efficiency potassium fertilizer, especially in the cultivation of chlorine-avoiding crops such as tobacco, grapes, sugar beets, tea trees, potatoes, flax and various fruit trees. It is an indispensable important fertilizer; it is also a high-quality fertilizer. The main raw material of nitrogen, phosphorus and potassium ternary compound fertilizer.

Potassium sulfate type compound fertilizer is produced by low-temperature conversion of potassium chloride, chemical synthesis, and shotcrete granulation. , Mg, Zn, Fe, Cu and other trace elements.This fertilizer is suitable for various economic crops, especially chlorine-avoiding crops.The main components of potassium sulfate type compound fertilizer are MAP (monoammonium phosphate), DAP (diammonium phosphate), and ammonium sulfate (mainly obtained from the neutralization of excess sulfuric acid and gaseous ammonia converted at low temperature).Potassium sulfate, urea and other other impurities such as calcium sulfate, iron, aluminum, magnesium and other salts of phosphoric acid and a small amount of unreacted potassium chloride.

Precautions for use

In acidic soil, excess sulfate radicals will increase the acidity of the soil, and even aggravate the toxicity of active aluminum and iron in the soil to crops.Under flooding conditions, excessive sulfate radicals will be reduced to hydrogen sulfide, which will cause the roots to suffer and turn black.Therefore, long-term application of potassium sulfate should be combined with farmyard manure, alkaline phosphate fertilizer and lime to reduce acidity. In practice, drainage and field drying measures should be combined to improve ventilation.

Second, in calcareous soils, sulfate radicals and calcium ions in the soil form insoluble calcium sulfate (gypsum).Too much calcium sulfate will cause soil compaction, and attention should be paid to increasing the application of farmyard manure at this time.

Third, it is important to use in chlorine-avoiding crops, such as tobacco, tea trees, grapes, sugar cane, sugar beets, watermelons, potatoes, etc., adding potassium sulfate not only increases the yield, but also improves the quality.Potassium sulfate is more expensive than potassium chloride and has less supply. It should be mainly used in cash crops that are sensitive to chlorine and prefer sulfur and potassium, and the benefits will be better.

Fourth, this fertilizer is a physiological acid salt, which can reduce soil pH when applied to alkaline soil.