1,2-O-diol is an important chemical raw material, which is generally made use of to produce polyester as well as also surfactant, as well as can also be made use of as a raw material for drugs. Straight-chain 1,2-o-diols, particularly C2-C4 o-diols, are primarily prepared by hydration of epoxides under high temperature and additionally anxiety or alkaline or acidic problems, as well as can in addition be prepared by oxidative hydration of terminal olefins.
1,2-pentanediol (1,2-o-diol of C5) is a vital natural intermediate, it is mostly used for the synthesis of the fungicide propiconazole, along with likewise for the manufacturing of polyester fibers, surfactants, cosmetics, medications crucial raw materials for items. United States Certificate No. 4,605,795 A (1986-08-12) discloses a constant production treatment. In a solvent, n-pentene as well as likewise peroxypropionic acid react to produce 1,2-epoxypentane, which desires that hydrated to get 1,2-pentanediol.
1,2-Pentanediol is a direct diol with unique polar in addition to non-polar ends, which is different from different other diols as well as also has multifunctionality. It is the essential intermediate of propiconazole, a systemic fungicide with high performance, low toxicity as well as long duration; propiconazole has really played an important responsibility in the control of fungal damages in food plants, vegetables, fruits, and so on, and also has an extremely wide application prospect. As an excellent humectant, anti-bacterial representative along with solubilizer, 1,2-pentanediol can properly enhance the water resistance of sun block cosmetics and is typically used in countless everyday care products.
Furthermore, 1,2-pentanediol is additionally an essential raw material for products such as polyester fibers, surfactants and pharmaceuticals. There are 2 major processes for the synthesis of 1,2-pentanediol reported in existing literature: one uses n-valeric acid as a basic material, goes through bromination to obtain α-bromo-n-valeric acid, and also hydrolyzes to get α-hydroxyvaleric acid. Hydrogen decline returns 1,2-pentanediol. The various other uses n-pentene as a raw material in addition to makes use of an oxidant system such as formic acid/hydrogen peroxide or peroxypropionic acid to oxidize n-pentene to pentoxide; hydrolyze it under alkaline conditions to get 1,2-pentanediol. The above-mentioned man-made course of 1,2-pentanediol tackles the petrochemical product C5.
The C5 part created in the petrochemical industry is generally made use of as gas, as well as also the return of 1-pentene or various other deep-processed things that can be taken advantage of as sources after rectification as well as splitting up is extremely reduced, causing high resources expenses for the manufacturing of 1,2-pentanediol. The previous art takes on multi-step response, and likewise there are lots of sort of byproducts, which cause decreased return in addition to thing purity of 1,2-pentanediol as well as high price; backwards production modern innovation is also a necessary reason impacting the development of 1,2-pentanediol. This significantly restricts the commercial manufacturing of 1,2-pentanediol.