Melamine Raw material powder Melamine

CAS:108-78-1

MF:C3H6N6

MW:126.12

EINECS:203-615-4

Specification: 99% min Melamine powder

Sample:Melamine powder

Packaging:1kg/bag, 25kg/drum

Brand: Henrikang

Appearance: White

Storage: Cool Dry Place

Shelf Life: 2 Years

Test Method: HPLC

Melamine powder Usage and Synthesis.

Melamine is an important nitrogen heterocyclic organic chemical intermediate with urea as raw material, which is more and more favored due to its environmental protection performance and wide range of uses, and is widely used in wood processing, plastics, coatings, water reducers, papermaking, adhesives, textiles, leather, electrical appliances, pharmaceuticals, flame retardants and other industries.

After decades of development, China has developed its own unique semi-dry technology, and at the same time also digested and absorbed advanced foreign process technology and equipment to further enhance the overall strength of the domestic TSP industry. At present, China has become the world's largest melamine production base and exporting countries.

Uses of Melamine powder.

Condensation polymerization with formaldehyde can produce melamine resin, which can be used in plastics and coating industry, also can be used as textile anti-folding, anti-shrinkage treatment agent. Its modified resin can be used to make metal paint with bright color, durability and good hardness.

It can also be used for strong, heat-resistant decorative sheet, moisture-proof paper and gray leather tanning agent, synthetic fireproof laminate adhesive, waterproof agent fixing agent or hardener.

582 melamine resin made from melamine, formaldehyde and butanol. It is used as leveling agent for solvent-based polyurethane coatings with excellent effect.

Industrial additives, widely used in plastics, coatings, textiles, paper. Recently tested items: milk powder, feed companies add melamine to increase the protein content.

As long as you add some chemicals with high nitrogen content, you can create the illusion that the protein content meets the standard in the test. This is why melamine is also known as "protein concentrate". Ingesting large amounts of melamine can damage the reproductive and urinary systems of humans and animals, resulting in kidney and bladder stones, kidney failure and death.

Preparation of Melamine powder.

The melamine production unit adopts the pressurized gas phase quenching and cooling method, in which the liquid urine from the urea plant area is used as the raw material to generate melamine and the by-product tail gas (ammonia and carbon dioxide) through catalytic reaction, and the excess ammonia and carbon dioxide are sent to the urea cogeneration unit to cogenerate urea, and the generated urea continues to be sent to the melamine plant, thus realizing the recycling of raw material production.

In the melamine crystallization section, the process gas from the crystallizer is separated by the finished product cyclone separator, and then the process gas at 210℃ enters the top of the liquid-urine scrubber tower, where it comes into contact with the liquid-urine downstream under the spray, and then reaches 133~138℃ after heat exchange by the liquid-urine cooler, and then enters into the collecting box through five column cyclones, where gas-liquid separation is performed to remove the melamine and low-temperature by-products, and then the gas is separated by the gas-carrying cyclone separator and enters into the collecting box, and the gas is carried by the gas-carrying cyclone separator and then enters the liquid-urine washing tower. The gas is then separated by carrier cyclone separator and enters into carrier gas compressor, part of which is used as circulating carrier gas, the other part of which enters into cold gas blower and is sent to crystallizer, and the excess melamine tail gas is sent to urea absorption system for recycling through tail gas compressor.

Product method of Bulk Melamine powder.

It is produced by reacting dicyandiamide with ammonia in methanol solvent at 200°C. This method consumes 1180kg of dicyandiamide (98%) per ton. This method consumes 1180kg of dicyandiamide (98%) and 30kg of liquid ammonia per ton of product.Compared with this method, urea method has low cost and is more often used nowadays.

The urea method uses ammonia as the carrier and silica gel as the catalyst, and the boiling reaction is carried out at a temperature of 380-400°C. The urea is first decomposed to produce cyanuric acid, and further condensed to produce melamine. The generated melamine gas is cooled and trapped to get the crude product, and then dissolved, remove impurities and recrystallized to get the finished product. The production of melamine by urea method consumes about 3800kg of urea and 500kg of liquid ammonia per ton of product.