Manufacturing Methods of Flame Retardants
Flame retardants are an important part of the field of raw materials for chemical production, and are widely used in a variety of materials such as plastics, rubbers, textiles, and coatings to improve their flame retardant properties and prevent fires from occurring. This article will introduce several common methods of flame retardant manufacturing.
I. Aluminum hydroxide flame retardant
Aluminum hydroxide is a kind of inorganic flame retardant with the advantages of non-toxic, tasteless and smokeless, which is widely used in plastic products. Its manufacturing method is as follows:
1. React the aluminum salt with alkali solution to produce aluminum hydroxide precipitate.
2. Wash, filter and dry the precipitate to get aluminum hydroxide product.
3. Aluminum hydroxide flame retardant with different particle sizes is made by grinding, sieving and other processes.
II. Phosphate ester flame retardant
Phosphate ester flame retardant is a kind of organic flame retardant with good heat resistance and water resistance, which is suitable for rubber, coating and other fields. Its manufacturing method is as follows:
1. React phosphoric acid with alcohols to produce phosphate ester.
2. Separate the phosphate ester from the unreacted raw material by distillation, extraction and other processes.
3. purify the phosphate ester to obtain high quality phosphate ester flame retardant.
3. Bromine flame retardant
Bromine flame retardant is a common organic flame retardant with good flame retardant effect and thermal stability, which is widely used in plastics, rubber and other fields. The manufacturing methods are as follows:
1. React bromine with hydrocarbon substances to generate brominated hydrocarbons.
2. purify the brominated hydrocarbons by distillation, crystallization and other processes. The purified brominated hydrocarbons are mixed with other additives to make brominated flame retardants.
4. Nitrogen-based flame retardant
Nitrogen-based flame retardant is an inorganic flame retardant with good heat resistance and water resistance, which is suitable for rubber, coatings and other fields. Its manufacturing method is as follows:
1. React the nitrogen source material with acid to produce nitrogen compound.
2. separating the nitrogen compound from the unreacted raw material by processes such as filtration and washing.
3. The nitrogen compounds are dried, ground, etc. to make nitrogen-based flame retardants.
The above describes several common methods of manufacturing flame retardants. Different flame retardants are applicable to different material fields, and their manufacturing methods will be different. In the process of manufacturing flame retardants, the quality and proportion of raw materials need to be strictly controlled to ensure the quality and performance of the products. At the same time, it is also necessary to pay attention to the safety and environmental protection in the production process to avoid harming the environment and human body.
In conclusion, the manufacturing method of flame retardant is of great significance for improving the flame retardant performance of materials, and has a positive effect on safeguarding people's lives and properties. In the future development, with the continuous progress and application of science and technology, the manufacturing methods of flame retardants will be constantly innovated and improved to provide strong support for the development of the field of raw materials for the production of chemicals.
