Tetrahydrofuran (THF) yog ib qho tseem ceeb ntawm cov organic sib xyaw nrog kev siv dav hauv kev lag luam chemistry. Nws yog cov kua uas tsis muaj xim, tsis muaj zog heev nrog cov tshuaj lom neeg thiab lub cev muaj zog. THF tuav txoj haujlwm tseem ceeb hauv kev lag luam tshuaj, ua haujlwm tseem ceeb ntawm cov khoom siv organic thiab tshuaj zoo. Nws daim ntawv thov txuas ntxiv dhau qhov kev sib txuas ntawm polytetramethylene ether glycol (PTMEG) - nws kuj tau siv dav los ua cov kuab tshuaj zoo. Cov cuab yeej no ua rau THF indispensable nyob rau hauv kev ua thiab zus tau tej cov hluavtaws thiab tej yam ntuj tso resins. Tsis tas li ntawd, nws plays lub luag haujlwm tseem ceeb hauv kev tshuaj, tshuaj hnyav formulations, tshuaj synthesis, thiab analytical reagents.
Cov khoom ntawm tetrahydrofuran (thf) yog dab tsi?
Lub cev muaj zog:
- Boiling Point: 66 degree
- Melting Point: -108.5 ° C
- Ceev: 0.889 g / cm³ (20 degree)
- Solubility: Tag nrho miscible nrog dej thiab ntau cov organic solvents
- Volatility: siab vapor siab; evaporates yooj yim
Chemical Properties:
- THF feem ntau yog cov tshuaj ruaj khov tab sis tuaj yeem tsim cov peroxides tawg thaum raug lub teeb lossis cua.
- Nws ua raws li Lewis lub hauv paus tsis muaj zog thiab tuaj yeem ua rau cov kua qaub.
- Nws cov qauv cyclic tso cai rau nws mus rau lub nplhaib - qhib cov tshuaj tiv thaiv nyob rau hauv lub xub ntiag ntawm cov kua qaub los yog lub hauv paus catalysts, tsim derivatives xws li 1,4-butanediol.
- THFyog ib qho hydrogenated derivative ntawm furan, cais raws li heterocyclic ether thiab saturated oxygen -muaj cov khoom xyaw.
Synthesis Methods:
- Ntuj → Formaldehyde → Succinic dialdehyde → 1,4-Butanediol → THF
- Pentose → Furan → THF (ntawm hydrogenation)
- Allyl cawv → Butanediol → THF
Kev ntsuas tshuaj lom thiab kev nyab xeeb ntawm Tetrahydrofuran (THF)
THF yog cov kua uas ua rau khaus thiab tshuaj loog uas ua rau muaj kev phom sij rau kev noj qab haus huv. Kev nqus pa tuaj yeem ua rau muaj ntau yam tsos mob xws li ua pa ua pa sab sauv, xeev siab, kiv taub hau, thiab hauv nruab nrab lub paj hlwb kev nyuaj siab. Ntev ntev los yog siab -qib kis yuav ua rau lub siab thiab lub raum puas thiab ua rau qhov muag khaus. Yog li ntawd, yuav tsum tau ceev faj txog kev nyab xeeb tsim nyog thaum tuav lossis siv THF.
Cov dej xau thiab kev tiv thaiv
Nyob rau hauv qhov xwm txheej ntawm THF xau, cov neeg ua haujlwm hauv thaj chaw cuam tshuam yuav tsum tau khiav tawm tam sim ntawd mus rau qhov chaw nyab xeeb, thiab thaj chaw yuav tsum nruj nruj kom tswj tau qhov nkag. Tiv thaiv cov khoom nchuav los ntawm kev nkag mus rau hauv dej los yog ib puag ncig ib puag ncig. Ncua lossis muaj cov txeej nrog cov xuab zeb lossis lwm yam tsis yog - cov khoom siv absorbable. Rau cov dej nchuav loj, kev tso dej ntau tuaj yeem ua tau zoo, tab sis cov dej ntxuav yuav tsum tau diluted kom zoo thiab tawm mus rau hauv cov dej khib nyiab kom tsis txhob muaj kev sib kis ntawm ib puag ncig.
Kev khaws cia thiab kev thauj mus los ntawm Tetrahydrofuran
Tetrahydrofuran (THF)yuav tsum muab khaws cia rau hauv cov thawv kaw nruj nreem kaw rau hauv qhov chaw txias, qhov dej zoo- qhov chaw muaj cua, kom deb ntawm qhov chaw ntawm tshav kub, sparks, thiab qhib nplaim taws. Nws yuav tsum tau muab cais tawm ntawm oxidizing tus neeg sawv cev, acids, thiab alkalis. Thaum lub sij hawm kev thauj mus los, xyuas kom meej tias cov tsheb tau nruab nrog cov khoom siv tua hluav taws uas tsim nyog thiab cov kev ntsuas ntawd nyob rau hauv qhov chaw tiv thaiv kom tsis txhob raug kub los yog tawg. Ntxiv nrog rau kev ua raws li tag nrho cov cai tswj kev nyab xeeb, kev tuav pov hwm kev nyab xeeb thoob plaws tag nrho cov txheej txheem kev thauj mus los yog qhov tseem ceeb los tiv thaiv kev sib tsoo.