Ammonium sulfate

Ammonium sulfate, also known as ammonium sulfide, is the earliest nitrogen fertilizer produced and used at home and abroad. It is usually regarded as a standard nitrogen fertilizer, and the nitrogen content is between 20% and 30%. Ammonium sulfate is a strong acid and weak base salt, and its aqueous solution is acidic. Ammonium sulfate is a nitrogen fertilizer in inorganic fertilizer, acidic fertilizer, long-term single use, so that the soil acidification and compaction, need to be improved. Ammonium sulfate cannot be used to produce organic fertilizer. Moreover, acidic fertilizer can not be used with alkaline fertilizer, and double hydrolysis is easy to lose the fertilizer effect. In the 1960s, ammonium sulfate was the main variety of nitrogen fertilizer and one of the main sources of sulfur that provided the nutrient element for crops. It was first neutralized with ammonia and sulfuric acid, but later the proportion of ammonium sulfate by product is getting larger and larger, and now basically all the by-products in China come from other industries, such as coking industry, caprolactam, sulfuric acid exhaust desulfurization, power plant desulfurization, acrylonitrile and methyl methacrylate, zinc oxide and other by-products. The by-product ammonium sulfate follows the principle of "treating waste with waste", realizes the comprehensive utilization of waste, and achieves the purpose of energy saving and emission reduction. Especially with the breakthrough of ammonia desulfurization project technology, the output of ammonium sulfate by-product of desulfurization in power plants will increase significantly in the future

Pure ammonium sulfate is a white crystal, the heat to 100℃ began to decompose into ammonia and ammonium bisulphate, by-products with yellow or gray, moisture absorption is small, not easy to caking, so it is easier to preserve, and more soluble in water, not soluble in ethanol and acetone. Ammonium sulfate is a physiologically acidic quick-acting nitrogen fertilizer, which is generally suitable for wheat, corn, rice, cotton, sweet potato, hemp, fruit trees, vegetables and other crops. For soil, ammonium sulfate is most suitable for neutral soil and alkaline soil, but not suitable for acidic soil. It is also used as an analytical reagent (precipitator, masking agent), supporting electrolyte in electrochemical analysis, microbial medium and ammonium salt preparation