1. The raw material of spandex synthesis reaction tetrahydrofuran itself can be polycondensation (ring-opening repolymerization by cation) to poly tetramethylene ether diol (PTMEG), also known as tetrahydrofuran homopolyether. PTMEG and toluene diisocyanate (TDI) are made into special rubber with wear resistance, oil resistance, good low temperature performance and high strength. A block polyether polyester elastic material was prepared with dimethyl terephthalate and 1, 4-butanediol. PTMEG with the relative molecular weight of 2000 and p-methylene bis (4-phenyl) diisocyanate (MDI) are the raw materials for polyurethane elastic fibers (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 spandex fiber.

2. Excellent solvent tetrahydrofuran is a commonly used excellent solvent, especially suitable for dissolving PVC, polyvinylidene chloride and butadiene, widely used as surface coating, anti-corrosion coating, printing ink, tape and film coating solvent, with Chemicalbook in electroplating aluminum liquid can be arbitrarily controlled aluminum layer thickness and bright. Solvent for tape coating, PVC surface coating, cleaning PVC reactor, removing PVC film, cellophane coating, plastic printing ink, thermoplastic polyurethane coating, adhesive, commonly used in surface coatings, protective coatings, inks, extractants and surface treatment agents for synthetic leather.

3. Used as raw materials for pharmaceutical and other organic synthesis for the production of tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyrolactone and pyrrolidone. In the pharmaceutical industry, it is used in the synthesis of coughbexil, rifumycin, progesterone and some hormone drugs. Thiophenol is produced by hydrogen sulfide treatment, which can be used as a odorant (identification additive) in fuel gas and is also a major solvent in the pharmaceutical industry.

4. Other uses chromatographic solvent (gel permeation chromatography), used for natural gas flavor, acetylene extraction solvent, polymer material light stabilizer, etc. With the wide application of tetrahydrofuran, especially the rapid growth of China's spandex industry in recent years, the demand for PTMEG in our country is increasing day by day, and the demand for tetrahydrofuran is also showing a rapid growth trend.