Introduction of sulfamic acid
Amino sulfonic acid, sulfuric acid is a kind of be replaced by amino and hydroxyl of the formation of the solid acid, inorganic chemical formula for NH2SO3H, molecular weight of 97.09, general for white, odourless rhombus crystal plate, relative density 2.126, melting point 205 ℃, soluble in water, liquid ammonia, at room temperature, as long as keep dry do not contact with water, solid sulfamic acid is not hygroscopic, It's fairly stable.  The aqueous solution of sulfenic acid has the same strong acid as hydrochloric acid and sulfuric acid, so it is also called solid sulfuric acid. It has the characteristics of non-volatile, odorless and small toxicity to human body. The dust or solution is irritating to eyes and skin and can cause burns. The maximum allowable concentration is 10 mg/m 3. Sulfamic acid can be used in the synthesis of herbicides, fireproofing agents, sweeteners, preservatives, metal cleaning agents, etc., is a common chemical raw materials.
Sulfamic acid cleaning agent used in a wide range, can be used to clean the boiler, condenser, heat exchanger, jacket and chemical pipeline. It is used in breweries to remove dirt from glass-lined storage tanks, POTS, open beer coolers, and beer kegs; Cleaning the evaporator of the enamel factory, and the equipment of the paper factory; In terms of air conditioning, rust and scale of cooling system and evaporative condenser can be removed; Sea ship with it can remove seawater evaporator (distillation equipment), heat exchanger and salt water heater in the algae, scale; Can clean copper kettle, radiator, tableware washing mechanism, silverware, toilet bowl, ceramic tile, food and milk processing equipment scale; It can remove the protein deposited on the cooking machine and the sediment on the sterilized loi used in the processing plant of fresh meat, vegetables and cheese. The United States Department of Agriculture permits the use of sulfamic acid as an acid cleaner in meat, poultry, rabbit, and egg processing enterprises.
Sulfamic acid can be used as the elimination agent of nitrite in excess of diazotization reaction in the dye industry, the fixing agent of textile dyeing, the formation of fireproof layer on textiles, and also can be used to make the net yarn agent and other auxiliary agents in the textile industry.
The paper industry
Sulfamic acid can be used as bleaching agent, can reduce or eliminate the catalytic effect of heavy metal ions in bleaching solution, so that the quality of bleaching solution is guaranteed, and can reduce the oxidation degradation of metal ions on fiber, also can prevent the fiber peeling reaction, improve pulp strength, whiteness.
The oil industry
Sulfamic acid can be used to relieve the blockage and increase the permeability of the reservoir. The SULFATonic ACID solution IS injected into carbonate reservoir, because SULFATonic acid is easy to react with reservoir rock and can avoid salt deposition. The cost of treatment is slightly higher than that of hydrochloric acid, but the yield of oil is doubled. The United States uses potassium glycolate 48.5%, sulfamic acid 3.4%. A 0.1-3% aqueous solution of wetting agent was used to clean the gypsum scale layer in the well casing. The treatment time was about 30 hours.
Sulfamic acid and ammonium sulfamic acid were originally developed as herbicides. They are said to be toxic when applied directly to plants; And when applied to the soil, it has a male killing effect.
In 1978, THE potency of sulfamic ACID was better than that of other salts IN THE experiment OF male killing of rice in Guangdong Province. The potency of sulfamic acid was sprayed with 0.05% ~ 0.5% concentration, and the male killing rate was 95% ~ 100%, but the potency was not stable and had drug damage. The herbicidal concentration of sulfamic acid is usually 75 g/L of active ingredient.
Sulfamic acid is commonly used when gold plating or alloy, gold plating, silver, gold-silver alloy bath is 60 ~ 170 g of sulfamic acid in each liter of water. A typical electroplating solution for silver-plated women's clothing needle is 125 g sulfosulfonic acid per liter of water, which can obtain a very bright surface silver plating. Alkali metal sulfamate, ammonium sulfamate or sulfamate can be used as conductive and buffering compounds in the new aqueous gold plating bath.
Sulfamic acid upstream raw materials: smoke sulfuric acid, urea and steam. As an important raw material of lithium battery electrolyte, sulfamic acid is the supporting industry of lithium electric new energy industry. Dilute sulfuric acid and other by-products are converted into ammonium sulfate in place by enterprises for fertilizer production, saving storage and transportation costs, and promoting the extension and development of modern chemical industry chain.