Tetrahydrofuran
English alias: THF; oxolane; Butane, alpha, delta-oxide; Cyclotetramethylene oxide; Diethylene oxide; Furan, tetrahydro-; Furanidine; 1, 2, 3, 4 - tetrahydro - 9 h - fluoren - 9 - ib
CAS nr. : 109-99-9
EINECS no. : 203-726-8
Cov mis mos molecular: C4H8O
Molecular Luj: 184.2338
InChI: InChI = 1 / C13H12O/c14-13-11-7-13-11-7-9 (11) 10-6-2-10-6-2 (10) 13 / h1, 3, 5, 7 H , 2,4,6,8 H2
Cov qauv molecular: Tetrahydrofuran 109-99-9
Qhov ceev: 1.17 g / cm3
Melting point: 108.4 ℃
Kub taw tes: 343.2 ° C ntawm 760 mmHg
Kev kub ceev: 150.7 ° C
Dej solubility: Miscible
Chav siab: 7.15E-05mmHg ntawm 25 ° C
Lub cev thiab tshuaj muaj zog:
Cov cim xim tsis muaj pob tshab kua, muaj ether tsw.
Kub taw tes ntawm 67 ℃
Qhov kub thiab txias - 108 ℃
Cov txheeb ze ntom ntom 0.985
Refractive Performance index ntawm 1.4050
Flash point - 17 ℃
Solubility yog miscible nrog dej, cawv, ketone, benzene, ester, ether, hydrocarbon.
Khoom siv:
Siv raws li hnyav thiab raw khoom rau organic synthesis

Tetrahydrofuran, abbreviated THF, yog heterocyclic organic compound. Nws belongs rau pawg ether thiab yog cov khoom ua tiav hydrogenation ntawm cov tshuaj tsw qab furan. Tetrahydrofuran yog ib qho ntawm cov muaj zog tshaj polar ether. Nws yog siv los ua ib qho nruab nrab polar hnyav hauv cov tshuaj tiv thaiv thiab rho tawm. Nws yog cov kua tsis muaj xim tsis muaj xim nyob rau hauv chav tsev kub thiab muaj cov ntxhiab tsw zoo li diethyl ether. Soluble hauv dej, ethanol, ether, acetone, Chemicalbook benzene thiab lwm yam organic solvents, hu ua "universal hnyav". Nws tuaj yeem yog ib feem miscible nrog dej ntawm chav tsev kub, uas yog vim li cas qee tus neeg muag khoom tsis raug cai reagent tau txais txiaj ntsig loj los ntawm kev sib xyaw tetrahydrofuran reagent nrog dej. Txij li THF nyiam tsim peroxides hauv kev cia, cov tshuaj antioxidant BHT feem ntau ntxiv rau cov khoom lag luam. Cov ntsiab lus dej tsawg dua 0.2%. Nws muaj cov yam ntxwv ntawm tsis tshua muaj toxicity, tsawg boiling point thiab zoo fluidity.
Tam sim no, cov neeg tsim khoom loj hauv tsev ntawm tetrahydrofuran suav nrog BASF Tuam Tshoj, Dalian Yizheng (DCJ), Shanxi Sanwei, Sinochem International, thiab Petrochina Qianguo Refinery, thiab lwm yam, thiab qee qhov PBT cov nroj tsuag kuj tsim ib feem ntawm cov khoom lag luam. LyondellBasell Industries 'kev muag khoom indexes nyob rau hauv lub tebchaws United States thiab Europe yog: purity 99.90% Chemicalbook, chroma (APHA) 10, ya raws 0.03%, THF hydroperoxide 0.005%, tag nrho impurity 0.05%, thiab oxidation inhibitor 0.025% ~ 0. Hauv kev lag luam polyurethane, kev siv tseem ceeb tshaj plaws yog cov khoom siv monomer rau polytetrahydrofuranediol (PTMEG), uas kuj yog ib qho tseem ceeb ntawm kev siv THF.

Main siv:
Lub hom phiaj tseem ceeb
1. Cov khoom siv raw ntawm cov synthesis ntawm polyurethane fiber ntau tetrahydrofuran tuaj yeem yog polycondensation (cationic pib lub nplhaib-qhib repolymerization) rau hauv polytetramethylene ether diol (PTMEG), tseem hu ua tetrahydrofuran homopolyether. PTMEG thiab TOLuene diisocyanate (TDI) yog tsim los rau hauv cov roj hmab tshwj xeeb nrog zoo hnav tsis kam, roj tsis kam, kev ua haujlwm kub thiab siab zog. Block polyether polyester elastomer tau npaj nrog dimethyl terephthalate thiab 1, 4-butanediol. Polyurethane elastic fibers (SPANDEX, SPANDEX), roj hmab tshwj xeeb thiab qee lub hom phiaj tshwj xeeb txheej yog tsim los ntawm 2000 PTMEG thiab p-methylene bis (4-phenyl) diisocyanate (MDI). Qhov tseem ceeb tshaj plaws ntawm kev siv THF yog los tsim PTMEG. Raws li cov ntaub ntawv ntxhib, ntau dua 80% ntawm THF hauv ntiaj teb yog siv los tsim PTMEG, thaum PTMEG feem ntau yog siv los tsim elastic spandex fiber ntau.
2. Tetrahydrofuran yog cov kuab tshuaj zoo uas feem ntau siv, tshwj xeeb tshaj yog tsim rau cov kua dej PVC, polyvinylidene chloride thiab butaniline. Nws yog dav siv los ua ib qho hnyav rau txheej txheej, tiv thaiv corrosion txheej, luam ntawv number case, sib nqus daim kab xev thiab zaj duab xis txheej. Sib nqus daim kab xev txheej, PVC txheej txheej, ntxuav PVC reactor, tshem tawm ntawm PVC zaj duab xis, cellophane txheej, yas luam ntawv number case, thermoplastic polyurethane txheej, hnyav rau nplaum, lug siv nyob rau hauv nto coatings, tiv thaiv coatings, inks, extractants thiab hluavtaws tawv nto finishing agents. .
3. Siv los ua raw cov ntaub ntawv rau organic synthesis xws li tshuaj rau zus tau tej cov tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, pentolactone, butyllactone thiab pyrrolidone, thiab lwm yam. Nyob rau hauv kev lag luam kws tshuaj, nws yog siv rau cov synthesis ntawm kepidine, rifamy. progesterone thiab qee cov tshuaj hormonal. Tetrahydrothiophenol, uas yog tsim los ntawm hydrogen sulfide kev kho mob, yuav siv tau raws li tus neeg sawv cev tsw (identification additive) nyob rau hauv roj roj thiab kuj yog lub ntsiab hnyav nyob rau hauv kev lag luam tshuaj.
4. Lwm yam kev siv cov kuab tshuaj chromatographic (gel permeation chromatography), siv rau cov roj tsw qab, acetylene extraction hnyav, cov ntaub ntawv polymer, xws li lub teeb stabilizer. Nrog rau kev siv dav dav ntawm tetrahydrofuran, tshwj xeeb tshaj yog kev loj hlob sai ntawm kev lag luam spandex hauv Suav teb nyob rau xyoo tas los no, qhov kev thov rau PTMEG hauv Suav teb tau nce zuj zus nyob rau ib hnub, thiab qhov kev thov rau tetrahydrofuran kuj qhia tau tias muaj kev loj hlob sai.