It is understood that Antioxidant 245 is in the form of white powder with a melting point of 81°C. It is a hindered phenolic antioxidant, odorless, low volatility, and has good Excellent color stability and extraction resistance to prevent thermo-oxidative degradation of materials during synthesis, processing and end use.
The preparation and production process steps of antioxidant 245 are as follows:
1. Raw material preparation: The raw materials for synthetic antioxidant 245 mainly include phenol, formaldehyde, Sulfuric acid and sodium hydroxide, etc. These raw materials require careful processing and preparation to ensure purity and quality during synthesis.
2. Condensation reaction: First, add phenol and formaldehyde into the reaction kettle in a certain proportion, heat and control the reaction temperature and time to cause a condensation reaction between the two. The condensation reaction is a key step in the synthesis of antioxidant 245 and needs to be carried out under appropriate conditions to ensure the purity and yield of the product.
3. Oxidation reaction: react the product obtained by the condensation reaction with an oxidant to oxidize it into the target product antioxidant 245. The oxidation reaction needs to be carried out under appropriate temperature and pressure conditions, and the reaction must be controlled time to ensure product quality.
4. Crystallization and separation: Crystallize and filter the reaction mixture to obtain a solid product, which is then washed and dried to finally obtain a pure antioxidant 245 product.
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