Di-tert-butyl peroxide uses alkyl Nitrate ester, peroxide and other additives currently used to improve the Cetane number of diesel oil. Among them, alkyl nitrates are ancient Cetane number improvers, which have a good effect on improving diesel Cetane number. This type of additive brings inevitable environmental pollution during the production process due the use of nitrating agents, such as nitric acid or a mixture of sulfuric acid dan nitrik asid. At the same time, Nitration is a violent Exothermic reaction, and there is also danger of explosion in the production process of such additives.
After the release of tert butyl hydroperoxide, tert butyl oxygen liberated radical is produced, which acts as the initiator of Chain reaction and reacts with the hydrogen of hydrocarbon molecules in diesel oil, making the Chain reaction continue. The function of tert butyl hydrogen peroxide lies in its ability to quickly generate tert butyl oxygen free radicals and trigger chain reactions. The desorption reaction of tert butyl hydrogen peroxide occurs on the O-O bond within the molecule, so the properties of the hydrocarbon side in the tert butyl hydrogen peroxide molecule are also very important. During the desorption process of tert butyl hydrogen peroxide with different layouts, in addition to producing tert butyl oxygen liberated groups, it also produces oxygen containing hydrocarbon liberated groups with different layouts. The desorption products of tert butyl hydrogen peroxide are oxygen containing liberated groups (RO ·, ROO ·), which have a strong affinity for electrons, that is, strong electrophilicity. During their reaction with hydrocarbons, it is important to attack hydrocarbon compounds with high electron density, such as aromatic compounds. Therefore, in diesel oil with lower Cetane number, there are more aromatics, and tert butyl hydroperoxide has a little better effect.
Step 1: oxidizing 27.5 percent hydrogen peroxide and 85 percent Tert-Butyl alcohol with 70 percent sulfuric acid to obtain tert butyl hydrogen peroxide;
Step 2: Di-tert-butyl peroxide is oxidized with Tert-Butyl alcohol and tert butyl hydroperoxide under the catalysis of sulfuric acid to obtain Di-tert-butyl peroxide. The operating temperature of this process must be an ice bath, and butanol should be slowly added to the reaction system. During the addition process, vigorous stirring is required, and the system temperature should not exceed 5 degree C during the addition process. Due to the release of a large amount of heat from the reaction, the stirring speed is too slow, resulting in partial overheating; If the temperature rises too fast, it will cause hydrogen peroxide to release and produce a large amount of O2, causing an explosion.
Penggunaan daripada Di-tert-butyl peroksida
As a modifier of dry oil, the addition of this product can significantly improve the dryness of Castor oil, whale oil, tung oil, soybean oil and flax oil. Adding to other plastics can improve their glossiness and drug resistance. As a crosslinking agent, it can be used in silicone rubber, synthetic rubber, natural rubber, polyethylene, EVA, and EPT. As a polymerization initiator, it can be used for polystyrene and polyethylene.
Di-tert-butyl peroxide or Di-tert-butyl peroxide
Dangerous characteristic: Strong oxidant, easily reacting with many other substances. It can form unstable and dangerous peroxides during storage. Explosion may be caused by heating, conflict or contact with reducing agent, Thiocyanate, organic matter, combustibles or contamination. Prevent containers from being touched, heated, and in conflict. It can cause static electricity to accumulate and ignite its vapor.