Brief introduction of 1,4-Butanediol
1,4-Butanediol, referred to as BDO, is an important organic and fine chemical raw material. Its main production processes include Reppe method (acetylenic aldehyde method), maleic anhydride method, propylene oxide method and butadiene method. 1,4-Butanediol (BDO) is widely used in the fields of medicine, chemical industry, textile, automobile and daily chemical industry, and its downstream derivatives include tetrahydrofuran (THF), polytetramethylene ether glycol (PTMEG), Polybutylene terephthalate (PBT), γ-butyrolactone (GBL), polyurethane (PU) and coatings, etc.
1,4-Butanediol is a colorless oily liquid with a flammable melting point of 20.1°C. Boiling point 235 ℃. Flash point (open cup) 121 ℃. Relative density d 4201.0171. Refractive index nD201.4461. Viscosity (25℃) 71.5mPa·s. Hygroscopic. Miscible with water, soluble in methanol, ethanol, acetone, slightly soluble in ether.
It has strong reactivity and can carry out various chemical reactions such as oxidation, dehydration, replacement, polymerization, amination, esterification, halogenation, etc., to generate a series of important chemical products. Ketone, slightly soluble in ether.
From acetylene and formaldehyde in the presence of a catalyst to produce 1,4-butynediol, and then obtained by catalytic hydrogenation. It can also be obtained from 1,3-butadiene, acetic acid and oxygen through acetyl oxidation, hydrogenation, hydrolysis and other reactions.
Packaging and Storage
It is packed in aluminum, galvanized iron drums or plastic drums, or stored and transported as flammable and toxic substances in tankers. Because the melting point is as high as 20 ℃, the tank car should be equipped with a heating tube.
1,4-Butanediol is widely used, except for the production of polybutylene terephthalate (PBT), tetrahydrofuran (THF), gamma-butyrolactone (GBL), N-methylpyrrolidone (NMP), In addition to fine chemical products with high added value such as N-vinylpyrrolidone (NVP), polyurethane resin (PU) and high-performance elastic fiber SPANDEX (spandex), they are widely used as solvents, pharmaceuticals, cosmetics, plasticizers, curing agents, Pesticides, herbicides, foam artificial leather, fibers, engineering plastics, etc.