Tetrahydrofuran THF

Colorless transparent liquid with ether smell. Miscible with water, alcohol, ketone, benzene, ester, ether and hydrocarbons.

1. Tetrahydrofuran, the raw material for the spandex synthesis reaction, can itself be polycondensed (ring-opening repolymerization initiated by cations) into polytetramethylene ether glycol (PTMEG), also known as tetrahydrofuran homopolyether. PTMEG is combined with toluene diisocyanate (TDI) to make a special rubber with wear resistance, oil resistance, low temperature performance and high strength; it is made with dimethyl terephthalate and 1,4-butanediol to make block polyether polyester elasticity Material. PTMEG with a relative molecular mass of 2000 and p-methylene bis (4-phenyl) diisocyanate (MDI) are used to make polyurethane elastic fibers (spandex, SPANDEX fibers), special rubber and some special-purpose coatings. The most important use of THF is to produce PTMEG. According to rough statistics, more than 80% of the world's THF is used to produce PTMEG, and PTMEG is mainly used to produce elastic spandex fiber.

2. Solvent with excellent performance Tetrahydrofuran is a commonly used excellent solvent, especially suitable for dissolving PVC, polyvinylidene chloride and butylaniline. It is widely used as a solvent for surface coatings, anti-corrosion coatings, printing inks, tapes and film coatings. When electroplating aluminum liquid, the thickness and brightness of the aluminum layer can be controlled arbitrarily. Tape coating, PVC surface coating, cleaning PVC reactor, removing PVC film, cellophane coating, plastic printing ink, thermoplastic polyurethane coating, adhesive solvent, commonly used in surface coatings, protective coatings, inks, Extractive agent and surface treatment agent for synthetic leather.

3. Used as raw materials for organic synthesis in pharmaceuticals and other industries to produce tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyrolactone and pyrrolidone, etc. In the pharmaceutical industry, it is used to synthesize Kebiqing, rifumycin, progesterone and some hormone drugs. Tetrahydrothiophenol is generated by hydrogen sulfide treatment, which can be used as an odorant (identification additive) in fuel gas and is also the main solvent in the pharmaceutical industry.

4. Other uses of chromatography solvent (gel permeation chromatography), used for natural gas flavoring, acetylene extraction solvent, polymer material light stabilizer, etc. With the widespread application of tetrahydrofuran, especially the rapid growth of my country's spandex industry in recent years, my country's demand for PTMEG is increasing, and the demand for tetrahydrofuran has also shown a rapid growth trend.