Heterocycles CAS：109-99-9
Heterocycles for use
【 Purpose 1 】Used as chromatographic analysis reagent, organic solvent and nylon 66 intermediate.
【 Purpose 2 】Used as solvent and raw material for organic synthesis.
【 Purpose 3 】Can be directly used to make synthetic fiber, synthetic resin, synthetic rubber, is also many polymeric materials, precision tape and electroplating industry solvent, also used for adipdinitrile, adipdinic acid, adipdineamine, succinic acid, butanediol, gamma-butylactone, etc., in the pharmaceutical industry, can be used for the production of kebixin, progesterone, rifumycin and used as a pharmaceutical solvent.
【 Purpose 4 】THF is an important raw material for organic synthesis and is a solvent with excellent properties, especially suitable for dissolving PVC, polyvinylidene chloride and butyl aniline. It is widely used as a solvent for surface coatings, anticorrosive coatings, printing ink, tape and film coatings, and as a reaction solvent. When used for electroplating aluminum liquid, the thickness of aluminum layer can be controlled arbitrarily and bright. THF itself can be polycondensation (by cationic ring-opening repolymerization) into polytetramethylene ether diol (PTMEG), also known as tetrahydrofuran homopolyether. PTMEG and toluene diisocyanate (TDI) made of wear resistance, oil resistance, low temperature performance, high strength of special rubber; Block polyether polyester elastic material was prepared with dimethyl terephthalate and 1, 4-butanediol. PTMEG with relative molecular weight of 2000 and p-methylene bis (4-phenyl) diisocyanate (MDI) to make polyurethane elastic fiber (SPANDEX fiber), special rubber and some special purpose coating raw materials. In organic synthesis, it is used to produce tetrahydrothiophene, 1.4- dichloroethane, 2.3- dichlorotetrahydrofuran, valerolactone, butyl lactone and pyrrolidone. In the pharmaceutical industry, THF is used in the synthesis of coughbexil, rifumycin, progesterone and some hormone drugs. THF is treated with hydrogen sulfide to produce tetrahydrothiophenol, which can be used as odor agent in fuel gas (identification additive). THF can also be used as a surface treatment agent for synthetic leather.
【 Purpose 5 】Tetrahydrofuran is an important organic chemical and fine chemical raw material, used as a solvent for natural and synthetic resins (especially vinyl resins), but also used in the production of butadiene, adiponitrile, adipic acid, adipdiamine, etc. Widely used in resin solvent (tape coating, surface coating, cleaning reactor, film removal, cellophane coating, plastic printing ink, thermoplastic polyurethane coating); Reaction solvents (form reagents, alkyl and aryl alkali metal compounds, aluminium and boron hydrides, steroidal compounds and macromolecular organic polymers); Chemical intermediate products (polymerization, natural gas flavoring agent); Chromatographic solvent (gel permeation chromatography).
【 Purpose 6 】Paper chromatography of amino acids and peptides, solvent, organic synthesis, high performance liquid chromatography, ultraviolet luminescence photometric analysis.
