Product name Ammonium sulfate
Exports generally include steel grade powder, caprolactam grade small particles, and extruded particles in three states
Colorless crystals or white particles. Odorless. Decomposes above 280°C. Solubility in water: 70.6g at 0°C, 103.8g at 100°C. Insoluble in ethanol and acetone. The pH of the 0.1 mol/L aqueous solution is 5.5. The relative density is 1.77. Refractive index 1.521. Ammonium sulfate is mainly used as a fertilizer and is suitable for various soils and crops. It can also be used in textile, leather, medicine and so on.
The pure product is colorless and transparent orthorhombic crystal, and the aqueous solution is acidic. Insoluble in alcohol, acetone and ammonia. It is hygroscopic and solidifies into lumps after absorbing moisture. When heated to above 513℃, it is completely decomposed into ammonia, nitrogen, sulfur dioxide and water. When it reacts with alkalis, it releases ammonia gas. It reacts with barium chloride solution to form barium sulfate precipitate. Proteins can also be salted out.
An excellent nitrogen fertilizer (commonly known as fertilizer powder), suitable for general soil and crops, can make branches and leaves grow vigorously, improve fruit quality and yield, and enhance the resistance of crops to disasters. It can be used as base fertilizer, top dressing and seed fertilizer, but long-term use May cause soil compaction. It can undergo metathesis reaction with table salt to produce ammonium chloride, react with aluminum sulfate to produce ammonium alum, and produce refractory materials together with boric acid. Adding to the electroplating solution can increase conductivity. It is also a catalyst for food sauce color, a nitrogen source for cultivating yeast in the production of fresh yeast, a dyeing aid for acid dyes, and a deliming agent for leather. In addition, it is also used in beer brewing, chemical reagents and battery production. Another important role is to mine rare earths. Ammonium sulfate is used as raw material for mining, and the rare earth elements in the ore are exchanged by ion exchange. The leaching solution is collected and simply filtered and separated, and then dried into rare earth ore. Each ton of rare earth ore produced is about 5 tons of ammonium sulfate are required.
There are also many biological uses, mostly used in protein purification processes, because ammonium sulfate is an inert substance and is not easy to react with other biologically active substances, which can protect protein activity to a greater extent during the purification process. In addition, the solubility of ammonium sulfate Excellent for creating a high-salt environment in preparation for protein precipitation and subsequent high-salt purification. There is a big difference between the solubility of ammonium sulfate at zero and 25 degrees at room temperature. The following are the molar concentrations of ammonium sulfate at different saturation levels at two temperatures.