Peroxides are also called initiators or additives. Today we introduce the use and synthesis method of Di-tert-butyl peroxide, hoping to bring more help to our friends!
Overview: Di-tert-butyl peroxide belongs to Organic peroxides, which can be used as crosslinking agent of unsaturated polyester and silicone rubber, and also as polymerization initiator.
Property: The production process of DTBP (initiator A) is intermittent, and the water quality, organic matter concentration, pH, salt content, BOD/CDO value of wastewater vary greatly with the production scale and time. DTBP is thermally unstable and prone to accelerated decomposition, leading to explosions; The DTBP dissolved in Chemicalbook in wastewater also rapidly decomposes at high temperatures, posing a safety hazard. The production process generates a large amount of waste acid, and a large amount of alkaline washing waste liquid is generated during product purification. The concentration of pollutants in wastewater is high, the composition is complex, and the B/C value is very low, making it impossible for biochemical treatment. Direct discharge of this type of wastewater into rivers can cause serious water pollution.
Application: DTBP (initiator A) is one of the most stable and commonly used Organic peroxides initiators. As a crosslinking agent, it can be used in silicone rubber, synthetic rubber and natural rubber, polyethylene chemicalbook, EVA, and EPT, etc. As a polymerization initiator, it can be used for polystyrene and polyethylene. It can also be used as a bleaching agent for oil and food, an additive for diesel and lubricating oil, and a pour point depressant for transformers.
Chemical properties: Colorless liquid. Melting point -40 ℃, boiling point 111 ℃, 80 ℃ (37.8kPa), 70 ℃ (26.2kPa), relative Chemicalbook density (20/4 ℃) 0.794, refractive index 1.3890. It is miscible with benzene, Petroleum ether and other organic solvents. Insoluble in water. Has strong oxidizing properties.
Usage: Used as a crosslinking agent for unsaturated polyester and silicone rubber, and also as a polymerization initiator. The theoretical active oxygen content is 10.94%, the activation energy is 146.9 kJ/mol, and the half-life is 218 hours (100 ℃), 34 hours Chemicalbook (115 ℃), and 0.15 hours (130 ℃). This product may explode in contact with reducing agents or under impact. The flash point is 18 ℃, flammable, and its vapor mixes with air to form an explosive mixture. Can irritate the eyes, skin, and respiratory tract. Widely used as a crosslinking agent for unsaturated polyester and silicone rubber, polymerization initiator for monomers, polypropylene modifier, rubber vulcanizing agent, etc
Production method: Tert-Butyl alcohol reacts with hydrogen peroxide in concentrated sulfuric acid. Mix and cool 222g (3mol) Tert-Butyl alcohol and 140g (1mol) 70% sulfuric acid to -2 ～ -8 ℃. Under intense stirring, add 126g (1Chemicalbookmol) of 27% hydrogen peroxide and 400g (4mol) of concentrated sulfuric acid dropwise within 90 minutes. After adding, continue stirring for 3 hours. Separate the oil layer, wash it with 60ml water, then wash it with 30% sodium hydroxide solution to remove tert butyl hydroperoxide, and finally wash it with water and dry it with magnesium sulfate to obtain the finished product.