Dibutyl peroxide, also known as di tert butyl peroxide, initiator a, and vulcanizing agent dTBP, is a colorless to yellow transparent liquid, insoluble in water, and miscible with benzene, toluene, acetone and other organic solvents. It is highly oxidizing, flammable, stable at room temperature, and insensitive to impact.
1. 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-lives are 218 hours (100 ℃), 34 hours (115 ℃), and 0.15 hours (130 ℃), respectively. This product may explode when in contact or under the impact of reducing agents. The flash point is 18 ℃, flammable, and its vapor and air mix to form an explosive mixture. It can affect the eyes, skin, and respiratory tract.
2. Widely used as a crosslinking agent, monomer polymerization initiator, polypropylene modifier, rubber curing agent, etc. for unsaturated polyester and silicone rubber.
Solubility of Di-tert-butyl peroxide: insoluble in water, soluble in ethanol, acetone and styrene, and miscible with benzene and petroleum. Skin contact: Remove and isolate contaminated clothing and shoes. Immediately wipe off any material from the skin. Keep the patient warm and quiet. Ensure that medical personnel are aware of personal protective knowledge related to the substance and pay attention to their own protection.
Eye contact: If the skin or eyes come into contact with the substance, immediately rinse with water for at least 20 minutes.
Inhalation: Move the patient to a place with fresh air. If the patient stops breathing, perform artificial respiration. If breathing is difficult, give oxygen. Risk characteristics: Strong oxidants, easy to react with many other substances. Peroxides can form unstable and dangerous peroxides during storage. Explosion may be caused by heating, conflict or contact with reducing agents, Thiocyanate, organic substances, combustibles or pollutants. Protect containers from impacts, high temperatures, and conflicts. It can cause static electricity to accumulate and ignite steam.
1. Add 222g Tert-Butyl alcohol and 140g 70% sulfuric acid into the enamel reverberation kettle, mix and cool to 2~-8 ℃. Under intense stirring, add 126g of 27% hydrogen peroxide and 400g of concentrated sulfuric acid within 90 minutes, and then stir continuously for 3 hours. The oil layer shall be separated by standing, washed with 60ml water, washed with 30% sodium hydroxide solution to remove tert butyl hydrogen peroxide, and washed with water. Dry the product and filter it by adding magnesium sulfate.
2. Add 222g (3.0mol) Tert-Butyl alcohol and 140g 70% sulfuric acid into the reverberation bottle equipped with mixer, thermometer and dropping funnel, and cool to -2~-8 ℃ under mixing. Gradually add 126g (1.0mol) of 27% hydrogen peroxide and 400g of concentrated sulfuric acid (4.0mol), approximately 1.5g. After adding, continue mixing and reverberating for 3 hours. Separate the oil layer, wash it with water, then wash the tert butyl hydroperoxide with 30% sodium hydroxide solution, then wash it with water, dry the anhydrous magnesium sulfate, filter it, and obtain Di-tert-butyl peroxide.