Uses of 1.4-Butanediol:

What is the uses of 1.4-Butanediol? 1,4-Butanediol  is an organic substance with the molecular formula C4H10O2 and molecular weight 90.12. Appearance is colorless or light yellow oily liquid. Flammable, freezing point 20.1℃, refractive index 1.4461. soluble in methanol, ethanol, acetone, slightly soluble in ether. 1.4-Butanediol is hygroscopic, bitter in odor and slightly sweet in mouth.

1.4-Butanediol Preparation Method:

1. Acetylene method: Firstly, 1,4-butynediol was made by reacting acetylene and formaldehyde in the presence of Cu-Bi catalyst at 98kPa, 80-95℃. The latter is then catalyzed by nickel skeleton and hydrogenated at 1.372-2.06 MPa, 50-60°C to 1.4-butanediol, followed by further catalytic hydrogenation with Ni-Cu-Mn/Al2O3 (13.7-20.6 MPa, 120-140°C) to 1,4-butanediol, which is then purified by distillation after removal of metal ions by ion exchange resin.
2. Maleic Anhydride Hydrogenation method.
3. Butadiene method: Acetyl oxidation reaction of 1,3-butadiene with acetic acid and oxygen to produce 1,4-diacetoxy-2-butene, then hydrogenated and hydrolyzed to make.
4. 1,4-dichlorobutene method: 1,4-dichlorobutene is an intermediate product of the process of producing chlorobutadiene from butadiene, and 1,4-butanediol is obtained from BDO by hydrolysis and hydrogenation as raw material.

1.4-Butanediol Development Situation:

BDO production basically adopts Reppe method and maleic anhydride method. With the gradual implementation of China’s policy to restrict the development of high energy consumption industries and energy conservation and emission reduction, the proportion of Reppe process BDO plants will decrease in the future; while maleic anhydride process will be developed faster due to the advantages of low investment, good product quality and low waste emission. However, because the price of maleic anhydride has remained high for a long time, all the maleic anhydride plants built in China have been shut down due to the impact of cost.