Utilizing advanced technology from United  States of America (USA) and  investment in critical facilities; Shanxi Sanwei Corporation had begun her operation for the 1,4-butanediol 25,000 ton/year grade projects since year-end 2001. After going through several technical reforms, the production capacity has achieved output of 30,000 tons. This project was enlisted as a "double-plus" project at National level, as well as a vital resource deployment project in Shanxi province. Other than closing up the gap for Reppe process technique in China, this project has significant meaning to the independent development of the Chemical industry in China, as well as the progress of the national economy.

    The completion of the 1,4-butanedio project of Sanwei Corporation has created conductive conditions for the development and manufacturing of the end products of BDO. At present, the projects for THF 15,000ton/year, PTMEG 15,000 ton/year, and γ-butyrolacton 10,000 ton/year of Sanwei Corporation have been completed and operational, with product quality achieving international advanced standard. Equipped with scientific management, excellent equipment, advanced techniques and high-quality personnel team, Sanwei Corporation will provide top quality products and first-class services to all her customers.

Product properties
Molecular formula:C₄H₁₀O₂                    Molecular weight:90.12
Flammable liquid of colorless and oil-state in nature, it can be dissolved and mixed in water, methanol, ethanol, acetone and slightly soluble in ethyl ether.
Boiling point 230℃,meiting point 20.1℃, flash point134℃, relative density(d2-20)1.017, ignition temperature:370℃ and refractive index 1.446.

Product specifications
Purity(%)                   ≥99.5
Chroma(APHA)        ≤10
Aqueous Content(ppm)≤500

Uses of product
1.1,4-butanediol is an important raw materials for organic and refined. It is the basic material for producing PBT plastics and fiber, and PBT is one of the five most promising engineering plastics.
2. 1,4-butanediol is the main raw material for producing THF, which is an important organic solvent. The polymeric compound PTMEG of THF forms the basic material for highly-elastic urethane elastic fiber, which is mainly used for producing high-grade sports wear and swimming suit that requirs high elasticity.
3. 1,4-butanediol is the main material for producing  γ-butyrolacton, which is widely used in pesticide, pharmaceuticals, cosmetics and other industries due to its ability to produce 2-pyrrolidone, NMP and their derivatives NVP and PVP etc. high add-ons products.
4. 1,4-butanediol is the main material for producing polyurethane artificial leather, polyurethane, elastomer and polyurethane sole glue. polyurethane elastomer are widely used to manufacture elastic sole, auto solid fire, friction conveying belt and etc.
Packaging, storage and transportation
The product shall be packed in 200 liter nitrogen-sealed steel drums and transported by train or tank-wagon. Under low ambient temperature and sealed packaging, there is no storage time limitation on the product, Though it does not explode or self-ignite under normal condition, it remains flammable in nature.