Melamine powder uses urea as raw material, and it takes about 3 tons of urea to produce 1 ton of melamine. China is the largest urea producer in the world, with large urea production and low prices. Even under the background of high tariffs to suppress urea exports, the annual urea export volume still reaches (3-7) million tons. With the abundant urea resources, China has unique advantages in melamine. Do you know what is the use of melamine?
(1) What is melamine?
Melamine, chemical formula: C3H6N6, commonly known as melamine and protein essence, is a triazine-type nitrogen-containing heterocyclic organic compound, which is used as a chemical raw material.
Melamine is white monoclinic crystals, almost odorless, slightly soluble in water, soluble in methanol, formaldehyde, acetic acid, glycerin, pyridine, etc., insoluble in acetone, ethers, and harmful to the human body. It cannot be used for food processing or food additives. Non-flammable, stable in nature at room temperature. The aqueous solution is weakly alkaline (pH 8), and can form melamine salts with hydrochloric acid, sulfuric acid, nitric acid, acetic acid, oxalic acid, etc. Melamine can be hydrolyzed in strong acid or strong lye to generate cyanuric acid. Both cyanuric acid and melamine have low acute toxicity, but when the two coexist, they will rely on hydrogen bonding to form a stable and insoluble macromolecular complex, namely melamine cyanurate, which can precipitate in kidney cells. As a result, kidney stones form, block the renal tubules, and eventually cause kidney failure.
(2) What is the industry uses of melamine powder?
Melamine powder has a wide range of uses as a common industrial raw material.
Melamine resin can be prepared by condensation polymerization of melamine powder and formaldehyde, which can be used in plastics and coatings industry, and can also be used as anti-folding and anti-shrinking treatment agent for textiles. The modified resin can be used as a metallic paint with bright color, durability and good hardness. It can also be used for sturdy, heat-resistant decorative sheets, moisture-proof paper and gray leather tanning agents, adhesives for synthetic fireproof laminates, fixatives or hardeners for waterproofing agents, etc.
582 melamine resin made from melamine powder, formaldehyde and butanol. Used as a leveling agent for solvent-based polyurethane coatings, with particularly good effect.
(3) Precautions for handling and storage of melamine powder
Since melamine is a dangerous chemical, a lot of attention should be paid to it during production and operation.
The handling precautions of melamine have the following points:
The operating environment requires airtight operation and full exhaust.
Operators must undergo special training and strictly abide by the operating procedures. It is recommended that operators wear self-priming filter dust respirators, chemical safety glasses, protective clothing and rubber gloves. Avoid generating dust. Avoid contact with oxidants and acids.
When handling melamine powder, load and unload with care to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment. Empty containers may be harmful residues.
The storage precautions of melamine powder have the following points:
Melamine should be stored in a cool, ventilated warehouse. Keep away from fire and heat sources. Cyanuric acid should be stored separately from oxidants and acids, and should not be mixed. The storage area should be equipped with suitable materials to contain the leakage.
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