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  Sodium cyanate is also a popular product recently. It can be used as pesticide raw material to produce dry land herbicides and insecticides. In addition to its efficacy, it is also a heat treatment agent for steel parts; as a resin modifier and cross-linking agent; as a raw material for medicine, veterinary medicine and dyestuff; as a raw material for surfactant, foaming agent and organic synthesis, etc. The manufacturer tells you how to monitor the purity of   sodium cyanate . Here's how to test the purity of sodium cyanate: 1. Accurately weigh 0.150g of the ground sample into a 250ml triangular flask, add a small amount of water until the sample is completely dissolved. 2. Add a drop of phenolphthalein indicator, the solution is red, and add 1:4 nitric acid solution with rubber head dropper until the red color disappears. Then, 25 ml 0.1 mol / L silver nitrate solution was accurately transferred into the pipette to form a white silver cyanate precipitate. Filtration. Add 5...

Phosgene is a very dangerous chemical gas in the synthesis of pesticides, which has been banned or restricted in many countries. With the advent of the era of green chemistry, it is urgent to find a clean production way to replace phosgene. Using sodium cyanate instead of phosgene in the synthesis of pesticides has the advantages of high safety, high yield and quality, and less waste material. Sodium cyanate process has the advantages of high safety, high yield and quality, and less waste. It is a promising green production process. Especially for the synthesis of sulfonylurea herbicide intermediates, sodium cyanate can replace silver cyanate to synthesize isocyanate, and can also directly synthesize sulfonylurea herbicides in one step. The advantages of one-step reduction method are that it avoids the use of highly toxic phosgene, does not use n-butyl isocyanate, and avoids the generation of a large number of by-products n-butylamine; all solvents can be recycled and reused, basi...

Phosgene is widely used in the preparation of polyurethane, polycarbonate and urea plastics. However, due to the highly toxic nature of phosgene, from the perspective of green chemistry,  sodium cyanate  is a safe and appropriate alternative to phosgene green products. With the continuous improvement of safety standards in the production process of chemical industry and the emergence of process safety and clean production technology, the production process still using phosgene and solid phosgene will gradually be replaced by sodium cyanate, mainly in the field of medicine and pesticide. The application of sodium cyanate instead of phosgene in the synthesis of pesticide and medicine has the advantages of high safety, high yield and quality, and less three wastes. Phosgene is a very dangerous chemical gas, which has been banned or restricted in many countries. In particular, phosgene is not easy to transport and store, and is only used in the plant. And using phosgene as raw mat...

Steel is a widely used metal in industry, and the microstructure of steel is also the most complex, so there are many kinds of heat treatment process. Metal heat treatment process can be generally divided into three categories: overall heat treatment, surface heat treatment and chemical heat treatment. Why is  sodium cyanate  preferred for heat treatment of steel parts? The purpose of preliminary heat treatment is to improve processing performance, eliminate internal stress and prepare good metallographic structure for final heat treatment. The heat treatment process includes annealing, normalizing, aging, tempering, etc. 1. annealing and normalizing Annealing and normalizing are used for hot worked blanks. For carbon steel and alloy steel with carbon content more than 0.5%, in order to reduce their hardness and be easy to cut, annealing treatment is often used; for carbon steel and alloy steel with carbon content less than 0.5%, normalizing treatment is used to avoid sticking...

For large castings, in the actual production, the deformation caused by heat treatment is very important to the subsequent process, and there are a lot of scrap due to excessive deformation. In order to reduce and control the deformation of large castings caused by heat treatment, we can optimize the process parameters of heat treatment, increase the isothermal stage, control the heating rate and the temperature of parts, and increase the quenching water temperature. Many manufacturers will buy  sodium cyanate  as heat treatment agent to reduce the deformation of heat treatment. In the process of heating and warming up, the surface temperature of the parts rises rapidly, the center temperature rises slowly, and there is thermal stress when there is a temperature difference between the surface and the center. The faster the heating speed, the greater the wall thickness of the parts, the greater the temperature difference and the greater the thermal stress produced. In the proce...

Heat treatment of iron and steel is the key factor that affects the production efficiency and the quality of finished products. Annealing process, normalizing process, quenching process, tempering process, surface quenching process, chemical heat treatment process are several major heat treatment processes. Sodium cyanate is a kind of heat treatment agent which is widely used as quenchant in steel processing. Sodium cyanate is often used as carburizing agent and nitriding agent in metal heat treatment. The toughness, wear resistance and corrosion resistance of metal surface treated with sodium cyanate are increased, and the fatigue life is obviously increased, especially for copper, which can be increased by 80%. 1. Steel parts with sodium cyanate have higher surface hardness and wear resistance 2. The steel parts with sodium cyanate have better thermal stability. 3. The steel using sodium cyanate has higher fatigue strength, anti seizing property and lower notch sensitivity. 4....

Sodium cyanate is also a popular product recently. It can be used as pesticide raw material to produce dry land herbicides and insecticides. In addition to its efficacy, it is also a heat treatment agent for steel parts; as a resin modifier and cross-linking agent; as a raw material for medicine, veterinary medicine and dyestuff; as a raw material for surfactant, foaming agent and organic synthesis, etc. Sodium cyanate is good to use, how to detect its purity? Here's how to test the purity of sodium cyanate: 1. Accurately weigh 0.150g of the ground sample into a 250ml triangular flask, add a small amount of water until the sample is completely dissolved. 2. Add a drop of phenolphthalein indicator, the solution is red, and add 1:4 nitric acid solution with rubber head dropper until the red color disappears. Then, 25 ml 0.1 mol / L silver nitrate solution was accurately transferred into the pipette to form a white silver cyanate precipitate. Filtration. Add 5 ml of 1:4 nitric aci...