Tetrahydrofuran

Tetrahydrofuran, luv luv THF, yog ib qho heterocyclic organic compound.belongs rau chav kawm ether, yog cov tshuaj tsw qab furan ua tiav cov khoom siv hydrogenation.

Tetrahydrofuran yog ib qho ntawm cov muaj zog tshaj polar ethers.Nws yog siv los ua ib qho nruab nrab polar hnyav hauv cov tshuaj tiv thaiv thiab kev rho tawm.Nws yog cov kua tsis muaj xim tsis muaj xim nyob rau hauv chav tsev kub thiab muaj ntxhiab tsw zoo li ether.Soluble nyob rau hauv dej, ethanol, ether, acetone, Chemicalbook benzene thiab lwm yam organic solvents, hu ua "universal hnyav".Nyob rau hauv chav tsev kub thiab dej tuaj yeem ua rau qee qhov tsis zoo, qee qhov kev lag luam reagent tsis raug cai yog siv qhov taw tes no rau tetrahydrofuran reagent dej profiteer.Vim tias qhov nyiam ntawm THF los tsim peroxides hauv kev cia, cov tshuaj antioxidant BHT feem ntau ntxiv rau cov khoom lag luam.Cov dej noo ≦0.2%.Nws muaj cov yam ntxwv ntawm tsis tshua muaj toxicity, qis boiling point thiab zoo fluidity.

Chemical Properties:tsis muaj xim pob tshab kua, nrog ether tsw.Sib tov nrog dej, cawv, ketone, benzene, ester, ether, thiab hydrocarbons.

Cov ntawv thov tseem ceeb:

1. Raw cov ntaub ntawv ntawm spandex synthesis cov tshuaj tiv thaiv:

Tetrahydrofuran nws tus kheej tuaj yeem yog polycondensation (los ntawm cationic nplhaib-qhib repolymerization) rau hauv polytetramethylene ether diol (PTMEG), tseem hu ua tetrahydrofuran homopolyl.PTMEG thiab toluene diisocyanate (TDI) ua los ntawm kev hnav tsis kam, roj ua haujlwm, kev ua haujlwm tsis tshua muaj kub, siab zog ntawm cov roj hmab tshwj xeeb;Block polyether polyester elastic khoom tau npaj nrog dimethyl terephthalate thiab 1, 4-butanediol.PTMEG nrog cov txheeb ze molecular hnyav ntawm 2000 thiab p-methylene bis (4-phenyl) diisocyanate (MDI) los ua polyurethane elastic fiber (SPANDEX fiber), roj hmab tshwj xeeb thiab qee lub hom phiaj tshwj xeeb txheej raw khoom.Qhov tseem ceeb tshaj plaws ntawm kev siv THF yog rau kev tsim cov PTMEG.Raws li cov ntaub ntawv ntxhib, kwv yees li 80% ntawm lub ntiaj teb THF yog siv los tsim PTMEG, thiab PTMEG feem ntau yog siv rau kev tsim cov fiber ntau spandex.

2. Solvent nrog kev ua tau zoo heev:

Tetrahydrofuran yog ib qho uas nquag siv cov kuab tshuaj zoo heev, tshwj xeeb tshaj yog tsim rau cov kuab tshuaj PVC, polyvinylidene chloride thiab butyl aniline, dav siv los ua txheej txheej, anticorrosive txheej, luam ntawv number case, daim kab xev thiab zaj duab xis txheej hnyav, nrog rau cov ntawv tshuaj hauv electroplating aluminium kua tuaj yeem tswj hwm ntawm txhuas. txheej thickness thiab ci.Cov kuab tshuaj rau daim kab xev, PVC txheej txheej, ntxuav PVC reactor, tshem tawm PVC zaj duab xis, cellophane txheej, yas luam ntawv number case, thermoplastic polyurethane txheej, nplaum, feem ntau siv nyob rau hauv nto txheej, tiv thaiv txheej, inks, extractants thiab nto kho cov neeg sawv cev rau hluavtaws tawv.

3. Siv los ua raw khoom rau cov organic synthesis xws li tshuaj:

Rau kev tsim cov tetrahydrothiophene, 1.4- dichloroethane, 2.3- dichlorotetrahydrofuran, valerolactone, butyl lactone thiab pyrrolidone.Hauv kev lag luam kws tshuaj, nws yog siv rau hauv kev sib txuas ntawm coughbixin, rifumycin, progesterone thiab qee cov tshuaj hormones.Tetrahydrothiophenol yog tsim los ntawm hydrogen sulfide kev kho mob, uas yuav siv tau raws li tus neeg sawv cev tsw nyob rau hauv cov roj roj (kev qhia ntxiv additive), thiab kuj yog lub ntsiab hnyav nyob rau hauv kev lag luam kws tshuaj.

4. Lwm yam kev siv:

Chromatographic hnyav (gel permeation chromatography), siv rau natural gas tsw, acetylene extraction hnyav, polymer cov khoom lub teeb stabilizer, thiab lwm yam. Nrog rau kev siv dav ntawm tetrahydrofuran, tshwj xeeb tshaj yog nyob rau hauv xyoo tas los no, kev loj hlob sai ntawm polyurethane kev lag luam, qhov kev thov rau PTMEG hauv peb. lub teb chaws yog nce, thiab qhov kev thov rau tetrahydrofuran kuj qhia tau hais tias muaj kev loj hlob sai.

Kev phom sij:Tetrahydrofuran belongs rau cov chav kawm 3.1 inflammable kua nrog tsawg flash point, flammable heev, vapor tuaj yeem ua rau tawg sib xyaw nrog huab cua, txwv kev tawg yog 1.5% ~ 12% (ntim feem), nrog rau khaus.Nws qhov xwm txheej kub kub heev kuj yog qhov muaj kev nyab xeeb.Qhov kev txhawj xeeb txog kev nyab xeeb loj tshaj plaws nrog THFS yog qhov tsim qeeb ntawm cov organic peroxides tawg heev thaum raug huab cua.Txhawm rau txo qhov kev pheej hmoo no, cov khoom lag luam muaj THFS feem ntau ntxiv nrog 2, 6-di-tert-butylp-cresol (BHT) los tiv thaiv kev tsim cov organic peroxides.Nyob rau tib lub sijhawm, THF yuav tsum tsis txhob qhuav vim tias cov organic peroxides yuav muaj zog nyob rau hauv cov distillation residue.

Kev ceev faj ua haujlwm:kaw ua haujlwm, puv qhov cua.Cov neeg ua haujlwm yuav tsum tau kawm tshwj xeeb thiab ua raws li cov txheej txheem ua haujlwm.Nws raug nquahu kom cov neeg ua haujlwm hnav lub npog ntsej muag roj lim (ib nrab daim npog ntsej muag), tsom iav tiv thaiv kev nyab xeeb, hnav khaub ncaws tiv thaiv zoo li qub, thiab hnab looj tes roj hmab.Khaws kom deb ntawm qhov hluav taws kub, qhov cua sov, tsis txhob haus luam yeeb hauv chaw ua haujlwm.Siv cov tshuab ua pa tawm thiab cov khoom tawg.Tiv thaiv kom tsis txhob muaj pa tawm mus rau hauv qhov chaw ua haujlwm huab cua.Tsis txhob sib cuag nrog oxidants, acids thiab bases.Tus nqi ntws yuav tsum tau tswj xyuas thaum lub sij hawm txhaws, thiab yuav tsum muaj cov khoom siv hauv av los tiv thaiv electrostatic tsub zuj zuj.Thaum tuav, lub teeb loading thiab unloading yuav tsum tau ua kom tsis txhob muaj kev puas tsuaj rau lub ntim thiab ntim.Nruab nrog ntau yam thiab ntau ntawm cov khoom siv hluav taws xob thiab cov khoom siv kho mob thaum muaj xwm ceev.Ib lub thawv khoob yuav muaj cov residue puas tsuaj.

Kev ceev faj cia:Feem ntau cov khoom muaj ib qho inhibitor.Khaws rau hauv ib qho chaw txias, ventilated warehouse.Khaws kom deb ntawm hluav taws thiab cua sov.Qhov kub ntawm lub warehouse yuav tsum tsis txhob ntau tshaj 30 ℃.Lub pob yuav tsum raug kaw thiab tsis sib cuag nrog huab cua.Nws yuav tsum tau muab cais los ntawm oxidizers, acids thiab bases, thiab yuav tsum tsis txhob tov.Kev tawg-pov thawj teeb pom kev zoo thiab qhov cua qhov chaw tau txais yuav.Tsis txhob siv cov cuab yeej siv tshuab thiab cov cuab yeej uas ua rau lub txim taws.Qhov chaw cia khoom yuav tsum tau nruab nrog cov khoom siv kho mob thaum muaj xwm txheej ceev thiab cov khoom tuav tsim nyog.

Ntim: 180KG / nruas