Tetrahydrofuran

Application

1. Tetrahydrofuran itself can 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, good 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 weight 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, about 80% of the world's THF is used to produce PTMEG, and PTMEG is mainly used to produce elastic spandex fiber.

2. Tetrahydrofuran is an 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. It can be used for electroplating aluminum liquids. Control the thickness of the aluminum layer and make it bright.

3. Used as raw materials for organic synthesis 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 after 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.