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1,4-J diol (1,4-butanediol) is abbreviated as BDO, the molecular formula is C 4H1002, the boiling point is 228 ~ 230 * C, the melting point is 20.2 ° C and the relative density is 1.014. It is a colorless oily liquid at room temperature, hygroscopic, miscible with water, soluble in methanol, ethanol, acetone, and slightly soluble in ether. When the temperature is higher than the melting point, the colorless oily liquid is needle-like crystal below the melting point. 1,4-butanediol is an important basic organic chemical raw material and fine chemical raw material. Its downstream derivatives are many and widely used. Its derivatives are high value-added fine chemical products, widely used in solvents, pharmaceuticals, cosmetics, plasticizers, curing agents, pesticides, mainly used in the manufacture of tetrahydrofuran (THF), polybutylene terephthalate (PBT) ), γ-butyrolactone (GBL), N-methylpyrrolidone (NMP), N-vinylpyrrolidone (NVP), etc.
Among them, THF can be used to prepare polytetramethylene glycol (PTMEG). With the downstream production of J glycol; the rapid development of the product has also rapidly increased its demand. 1 Basic route for the synthesis of 1,4-butanediol I has been producing 1,4-butane=alcohol for six or seventy years. During this period, there have been many different routes depending on the raw materials used. Divided into Reppe method, propylene oxide method, butadiene method, maleic anhydride method and the like.
Last week, China's domestic BDO market was stagnant, and the market supply was sufficient during the week. Some of the suppliers had a good price intention, and the market response was flat. The supplier's shipping pressure remained, and the high-end negotiation was hard to find. However, last week's BDO's two major raw materials, methanol and calcium carbide, were all strong, with methanol in the mainland increasing by a large margin. The increase in the week was about 5%. The cost end was supported, but in the case of BDO tending to imbalance between supply and demand, the raw material end The influence is weak. Accumulation of factory inventory, poor downstream buying pressure, shipping pressure is still relatively large, it is expected that this week, the market will talk about the possibility that the supplier will continue to make profits, and the low-end deposits may continue to explore.