Tetrahydrofuran (THF): Nkolo lowu nga ni swilo swo tala wa Maendlelo ya tikhemikhali lama kongomeke
Nxopaxopo wo Enta wa Swihlawulekisi swa Physicochemical
Vumaki byo Hlawuleka bya Molekhuli
Xivumbeko xa THF xi katsa ring ya cyclic ether leyi nga na athomo ya oxygen, leswi tumbuluxaka swihlawulekisi swa nkoka leswi landzelaka:
Polar Solvency: Dipole moment ya 2.75 D yi endla leswaku hydrogen bonding na ti polar molecules loko yirikarhi yi solvating nonpolar compounds hiku tirhisa induced dipole interactions, leswi endlaka leswaku yiva kahle eka ti reaction to hambana hambana.
Ring Reactivity: Ring ya ether yi hundza eka acid-catalyzed ring-opening, leswi olovisaka reactions yofana na alkylation na polymerization. Ku cinca loku i ka nkoka swinene eka ku endla ti polymers tofana na polytetramethylene ether glycol (PTMEG).
Swihlawulekisi swa Miri
Thermal Stability: Ku vila eka 66°C naku titimela eka -108.5°C, THF yitshama yiri mati eka mahiselo yo anama, leyi lulameleke eka ti reactions ta mahiselo yale hansi xikan’we na maendlelo ya xihatla ya evaporation.
Swihlawulekisi swa Vutleketli: Viscosity yale hansi (0.55 mPa·s) xikan’we na high surface tension (26.4 mN/m) swi engetelela vuswikoti bya yona byo tsakamisa, leswinga swa nkoka swinene eka switirhisiwa swo basisa naku peta.
Xitsundzuxo xa Vuhlayiseki: Yi pfurha swinene (flash point -17.2°C) naswona yi endla swihlanganisi leswi pfurhaka na moya (1.8–12.4% vol), leswi lavaka magoza yo tika yo sivela ndzilo.
Switirhisiwa swa Nkoka Eka Tiindasitiri Hinkwato
Vuhumelerisi bya Polymer na Resin
Ku Endliwa ka Polyurethane (PU): .
Vuhumelerisi bya PTMEG: THF i xitirhisiwa xosungula xoka xinga tirhisiwa eka ku endla polytetramethylene ether glycol (PTMEG), xiphemu xa nkoka xo olova eka ti fibre ta spandex na ti thermoplastic polyurethanes (TPUs). Ku tlula 90% wa THF ya misava hinkwayo yitirhisiwa eka sekithara leyi, laha thani yin’wana na yin’wana ya spandex yi lavaka ~0.8 tons ya THF.
PU Adhesives: Yi hlanganisiwile na DMF, THF yi tumbuluxa swinamarheti leswi omaka hiku hatlisa, leswi tiyeke swinene swa swiambalo swa milenge nale ndzeni ka mimovha, leswi nyikaka 35% wa swilo swo tiya na 40% wa ku oma hiku hatlisa kutlula tisisiteme ta DMF to basa.
Epoxy na Ti-Resin to Endliwa:
Tanihi co-solvent eka ti epoxy formulations, THF yi antswisa ku hlangana naku hunguta viscosity, leswi endlaka leswaku kuva na switirhisiwa swa coating leswi kongomeke eka electronics na aerospace.
Tikhemikhali ta Organic na to Hlawuleka
Swiendlo swa Grignard:
THF yi tiyisisa ti organometallic intermediates (xikombiso, RMgX) hiku tirhisana na ti magnesium ions, leswi tlakusaka mbuyelo wa reaction hi 15–20% loko ku pimanyisiwa na diethyl ether. Xikombiso: Eka ku endliwa ka ibuprofen, magoza ya Grignard lawa ya simekiweke eka THF ya fikelela ≥99.5% wa ku basa na ≤0.3% wa swikumiwa swa le tlhelo.
Tielektroliti ta Betiri ya Lithiyamu:
THF yi ndlandlamuxa ku fambisa ka ti electrolytes leti simekiweke eka lithium hexafluorophosphate (LiPF3) (≥10 mS/cm), ku antswisa vutomi bya xirhendzevutani ku tlula 1,000 wa minkarhi (ku hlayisiwa ka vuswikoti ≥85%) eka tibetiri ta nsimbi ya lithium.
Tinsimu ta Thekinoloji ya le Henhla na yo Hlawuleka
Ku basisiwa ka Semiconductor: THF yi susa masalela ya photoresist eka vumaki bya microelectronics, ku fikelela ku thyakisa ka ion ya nsimbi ≤10 ppb eka maendlelo ya sub-14 nm.
Pharmaceutical Crystallization: Yitirhisiwa eka recrystallizing antibiotics na steroids, ti THF-water systems ti humesa ti crystals leti fanaka (50–200 μm) letingana ≥99.9% wa vutengi.
Ku Humesiwa ka Swikumiwa swa Ntumbuluko: Hiku hlawula ku n’okisela ti lipophilic compounds (xikombiso, CBD, paclitaxel) hi 25% wa vutengi byale henhla kutlula ti nonpolar solvents, loko yirikarhi yi hunguta ku onhaka ka mahiselo hiku tirhisa ku lulamisiwa ka mahiselo yale hansi.
Swihlawulekisi swa kona
| Vito ra Xiendliwa | Asidi ya Propionic | |||||||||
| Fomula ya Tikhemikhali | C3H6O2 | |||||||||
| Ndzilo wa Molekhuli | 74,08 g/mol | |||||||||
| Xivumbeko | Mati lama nga erivaleni lama nga riki na muhlovo | |||||||||
| Ndhawu yo N’oka | -20.8°C | |||||||||
| Ndhawu yo Vila | 141,1°C | |||||||||
| Rendzo | 0.993 g/cm3 | |||||||||
| CAS NO | 79 - 09 - 4. Xitsonga | |||||||||
| Khodi ya HS | 29155000 | |||||||||
| EINECS NO | 201 - 176 - 3. Xihlamusela-marito xa Xitsonga | |||||||||
| Xikombelo | Yi cheriwa eka tipulasitiki, pharma, swakudya, swintshuxekisi na swinun’hweriso | |||||||||
Xiphephana xa Vulawuri bya Khwalithi
| Vito ra Xiendliwa | Asidi ya Propionic | ||||||
| NCHUMU | NKOKA WA XIYIMO XA LE HENHLA (%) . | NKOKA WA XIKAMBELANTWISISO (%) . | |||||
| Nhlayo ya Propionic Acid, w/%≥ | 99.5 | 99.9 | |||||
| Ku tsindziyela (20/20°C) . | 0.993-0.997 | 0.996 | |||||
| Nhlayo ya ku vila/°C | 138.5-142.5 | 139.4-141.1 | |||||
| Masalela ya ku khuluka,w/%≤ | 0.01 | 0.006 | |||||
| Mati,w/%≤ | 0.15 | 0.02 | |||||
| Aldehyde,w/%≤ | ≤0.05 | 0.04 | |||||
| oxidization yo olova,w/%≤ | ≤0.05 | 0.01 | |||||
| Pb mg/kg≤ | 2.0.0 | ≤2.0 | |||||
| Tanihi mg/kg≤ | 3.0.0 | ≤3.0 | |||||
| Mahetelelo | Landzelela swipimelo swa GB 1886.210-2016 | ||||||
Ku tekeriwa enhlokweni ka Vuhlayiseki na ku Cinca ka Vumaki
Makhombo ya Rihanyo na Ntivo-mbango
Chefu: Ku hefemula ka nhlayo yale henhla (>500 ppm) swinga vanga ntshikilelo wa CNS; ku hlangana nkarhi wo leha swi nga khumba ntirho wa xivindzi/tinso. Swi lava nsirhelelo wa ku hefemula (APF≥10) na magilavu lama nga ngheniwiki hi tikhemikhali.
Vuyelo bya mbango: Yi onhaka hi swilo leswi hanyaka emisaveni (hafu ya vutomi ≤5 wa masiku) kambe yi na chefu eka vutomi bya le matini (LC50 fish=110 mg/L). Mati ya thyaka yafanele ku endliwa vutshunguri bya xiyimo xale henhla (COD≤50 mg/L) loko yanga se humesiwa.
Tinhlamulo ta Vulawuri na ta Xithekiniki
Tigredi ta Vutengi: .
Industrial (≥99%): Eka ku hlanganisiwa hiku angarhela, ku pfumelela ≤0.5% ya mati/aldehydes.
Elektroniki (≥99.9%): Ti-ion ta nsimbi ≤1 ppb, leti fambisanaka na SEMI C8 eka ku tirhisiwa ka semiconductor.
Mirhi (≥99.5%): Yi pfumeleriwile hi FDA, ti aldehydes ≤10 ppm eka vuhumelerisi bya mirhi.
Ku Landzelela milawu ya Misava Hinkwayo:
EU REACH: Yi siveriwa eka switirhisiwa leswi hlanganaka na swakudya (ku rhurha ≤0.05 mg/kg).
US OSHA: PEL-TWA 200 ppm (590 mg/m3), leswi lavaka ku vekiwa tihlo ka moya wa le ntirhweni.
Ha Yini Hi Hlawula THF Ya Hina?
Ku basa loku nga tinyiketeliki: Maendlelo yale henhla ya triple-distillation ya humesa electronic-grade THF eka 99.99% wa vutengi, na ≤10 ppm ya ndzhongho na ≤1 ppm aldehydes, leswi tiyisisaka ku ringanana ka batch-to-batch (ku hambana ≤±0.02%).
Switshuxo swa Custom: Swivumbeko leswi lulamisiweke eka nhlayo ya mati (50–1000 ppm), ti levele ta peroxide (≤10 ppm), na pH (5.0–7.0), kufana na low-peroxide THF eka ti sensitive pharmaceutical syntheses.
Vutleketli lebyi Fambiwaka hi Vuhlayiseki: Vuhlayiselo lebyi funengetiweke hi nitrogen xikan’we na maendlelo ya vutleketli lawa yanga pfurhaka switiyisisa ku khomiwa loku hlayisekeke kusukela eka vuhumelerisi kuya eka ku rhumeriwa.
Vutshila bya Vulawuri: . Ku landzelerisa ka misava hinkwayo ka swipimelo swa SEMI, ACS, na FDA, leswi seketeriwaka hi MSDS leyi nga cinciwaka ku nghena eka makete hi ndlela leyi nga na swiphiqo.
Ntirhisano wa Vutshila bya Tikhemikhali
Ku ringanisela ko hlawuleka ka THF ka solvency, reactivity, na process adaptability swiyi veka tani hi ribye ra xisekelo eka tikhemikhali ta manguva lawa. Ku tinyiketela ka hina eka swikumiwa swa vutengi bya le henhla, vutumbuluxi bya xithekiniki, na ku landzelela milawu swi nyika matimba eka vaxavi eka tipulasitiki, swa elektroniki, na mirhi ku fambisa ku humelela hi vutihlamuleri. Hlawula THF ya hina ku pfula ku kongoma, matirhelo, na ku tshamiseka eka xitirhisiwa xin’wana na xin’wana.