Mono Ethylene Glycol (MEG), tseem hu uaethylene glycollos yog ethane-1,2-diol, yog ib qho tseem ceeb ntawm cov tshuaj siv dav hauv kev lag luam petrochemical thoob ntiaj teb. Nws feem ntau yog siv rau hauv polyester (PET) ntau lawm, antifreeze formulations, heat-transfer systems, thiab ntau yam kev lag luam tshuaj.
Vim nws lub cev ruaj khov-xws li qhov chaw txias txias, qhov kub siab kub, thiab ua tiav cov dej tsis zoo-MEG tau dhau los ua cov khoom siv raw hauv cov ntawv thov loj -.
Mono Ethylene Glycol (MEG) yog dab tsi?
Mono Ethylene Glycol (MEG) yog ib qho organic compound nrog cov mis molecular C₂H₆O₂ thiab molecular hnyav ntawm 62.07 g / mol.
Nws yog xim tsis muaj xim, pob tshab, kua nplaum me ntsis ntawm chav tsev kub. Cov molecule muaj ob pawg hydroxyl (–OH), uas muab MEG muaj zog hygroscopicity, siab solubility hauv dej, thiab zoo reactivity nyob rau hauv polymerization txheej txheem.
Mono ethylene glycol ua li cas?
MEG feem ntau yog tsimlos ntawm catalytic hydration ntawm ethylene oxide (EO), uas nws tus kheej yog muab los ntawm ethylene tau nyob rau hauv petrochemical cracking txheej txheem.
Simplified ntau lawm txoj kev:
Ethylene → Ethylene Oxide → Mono Ethylene Glycol
Txoj kev tsim khoom no ua rau Ethane-1,2-diol yog ib qho tseem ceeb ntawm cov khoom lag luam hauv ntiaj teb petrochemical saw.
Cov ntaub ntawv tseem ceeb ntawm MEG
| Khoom | Tus nqi |
|---|---|
| Tshuaj npe | Mono Ethylene Glycol |
| Lub Npe | Ethylene Glycol |
| CAS Nr. | 107-21-1 |
| Molecular Formula | C₂H₆O₂ |
| Molecular Luj | 62,07 g / mol |
| Qhov tshwm sim | Ntshiab, xim tsis muaj kua |
| Boiling Point | 197.3 degree |
| Melting Point | -12.9 ° C |
| Ceev (20 degree) | 1.113 g / cm³ |
| Flash Point | ~ 111℃(kaw khob) |
| Solubility | Tag nrho miscible nrog dej |
| HS Code | 29053100 |
Physical Properties of MEG
Qhov tshwm sim
Ethane-1,2-diol yog cov kua ntshiab, tsis muaj xim nrog cov viscosity nruab nrab. Nws sib tov tau yooj yim nrog dej thiab feem ntau cov kuab tshuaj polar, uas ua rau nws haum rau cov formulations muaj.
Kub Point (197.3 degree)
Cov ntsiab lus kub kub kuj txo cov evaporation poob hauv cov tshuab kaw xws li cua sov- hloov cov kua dej thiab cov tshuab cua txias.
Txias cwj pwm (-12.9 degree)
MEG muaj qhov chaw txias txias, thiab thaum sib xyaw nrog dej, nws ua rau qhov kub thiab txias txias. Qhov no yog lub hauv paus rau nws siv nyob rau hauv antifreeze systems.
Flash Point (~ 111 degree)
Mono Ethylene Glycolyog cais raws li ib tug combustible kua. Nyob rau hauv ib txwm cia tej yam kev mob, nws tsis yog heev flammable tab sis tseem yuav tsum tau khaws cia kom deb ntawm qhov hluav taws kub qhov chaw.
Solubility
MEG yog miscible kiag li nrog dej, ethanol, thiab acetone, ua rau nws hloov tau yooj yim nyob rau hauv cov tshuaj formulations.
Qhov ntom
Nrog rau qhov ceev ntawm ~ 1.113 g / cm³, MEG muab kev coj tus cwj pwm ruaj khov hauv cov tshuab dej.
Hygroscopic xwm
MEG absorbs noo noo los ntawm ib puag ncig, uas muaj txiaj ntsig zoo hauv kev siv roj ua kom lub cev qhuav dej tab sis yuav tsum tau tswj kev cia kom muaj kev huv.
Chemical Properties of MEG
Cov cwj pwm tshuaj lom neeg ntawm MEG feem ntau cuam tshuam nrog nws ob pawg hydroxyl.
Reactivity
Monoethylene Glycol tuaj yeem raug esterification, etherification, oxidation, thiab polycondensation tshua. Nws cov tshuaj tiv thaiv tseem ceeb tshaj plaws yog kev tsim cov polyethylene terephthalate (PET) los ntawm cov tshuaj tiv thaiv nrog purified terephthalic acid (PTA).
Kev ruaj ntseg
MEG tseem nyob ruaj khov nyob rau hauv ib txwm kub thiab siab tej yam kev mob, cia ntev - lub sij hawm cia thiab kev lag luam siv.
Kev sib haum xeeb
Mono Ethylene Glycolmuaj kev sib raug zoo nrog ntau cov organic thiab inorganic cov ntaub ntawv, txhawb kev siv cov kuab tshuaj, resins, coatings, thiab tshuaj intermediates.
Cov ntawv thov kev lag luam ntawm Mono Ethylene Glycol
Kwv yees li 90% ntawm MEG thoob ntiaj teb tau siv hauv polyester ntau lawm. Cov ntim ntxiv yog siv los tiv thaiv kev khov, cov kuab tshuaj, kev kho roj, thiab kev siv hauv kev lag luam.
Polyester (PET) Manufacturing - Daim ntawv thov tseem ceeb
MEG yog cov khoom siv tseem ceeb hauv PET ntau lawm, reacting nrog PTA los ntawm polycondensation.
Cov khoom tseem ceeb PET suav nrog:
- Polyester fibers (textiles, industrial fabrics)
- PET lub raj mis (cov dej haus thiab ntim khoom noj)
- BOPET films ( ntim, cov ntaub ntawv rwb thaiv tsev)
Fiber-qib MEG feem ntau xav kom purity Ntau dua lossis sib npaug li 99.9% kom ntseeg tau tias cov khoom zoo polymer ruaj khov.
Antifreeze & Heat Transfer Systems
MEG- cov dej sib tov yog siv dav hauv kev tswj xyuas thermal.
Daim ntawv thov:
- Automotive cav coolant
- HVAC systems
- Industrial tshav kub exchangers
- Cov tshuab ua tub yees
MEG - cov kua dej ua kom zoo tuaj yeem txo cov ntsiab lus khov thiab txhim kho cov cua sov hauv qhov kaw - lub voj voog.
Solvents & Chemical Intermediates
Ethane-1,2-diol yog siv los ua cov kuab tshuaj kub kub thiab nruab nrab hauv:
- Coatings thiab xim
- Printing inks
- Adhesives
- Plasticizers
- Polyurethane ntau lawm
- Kev tsim cov surfactant
Nws kuj yog siv rau hauv cov roj ntsha dej vim nws muaj zog nqus dej.
Muaj & Tshwj xeeb siv
Cov ntawv me me - nplai muaj xws li:
- Oilfield drilling kua dej
- Tawv ua
- Qhob antifreeze additives
- Humectants (moisture tswj)
- Muaj kev tu cov formulations
Cov ntaub ntawv khaws cia, tuav & kev nyab xeeb
MEG yuav tsum muab khaws cia rau hauv cov thawv kaw nruj nreem nyob rau hauv qhov txias, qhuav, thiab zoo -ventilated tej yam kev mob.
Cov lus pom zoo cia:
- Tsis txhob muaj cov oxidizing muaj zog
- Tsis txhob siab - qhov kub thiab txias
- Siv cov pa roj carbon steel lossis stainless hlau cia tank
- Khaws cov ntim ntim kaw kom txo tau cov dej noo
Ntim Cov Kev Xaiv:
- 230 kg steel nruas
- IBC tanks
- ISO tanks
- Tej nkoj nquam shipping
Puas yog Mono Ethylene Glycol muaj kev phom sij?
Monoethylene Glycol muaj qhov tsis muaj zog thiab tsis muaj tshuaj lom nyob rau hauv cov xwm txheej raug.
Txawm li cas los xij, kev noj tshuaj yog qhov txaus ntshai vim tias nws tau metabolized rau hauv glycolic acid thiab oxalic acid, uas yog tshuaj lom rau tib neeg.
Standard industrial ceev faj:
- Cov hnab looj tes tiv thaiv
- looj tsom iav dub
- Qhov cua txaus
- Spill container systems
- Ua raws li SDS (Safety Data Sheet) cov lus qhia
MEG vs DEG vs TEG (Industrial Comparison)
| Yam khoom | MEG | DEG | TEG |
|---|---|---|---|
| Molecular loj | Tsawg tshaj plaws | Nruab nrab | Loj tshaj plaws |
| viscosity | Tsawg | Nruab nrab | Siab |
| Kev siv tseem ceeb | PET, antifreeze | Cov kuab tshuaj | Plasticizers, lub cev qhuav dej |
| Toxicity | Siab dua | Nruab nrab | qis |
Cov lus nug nquag nug (FAQ)
MEG feem ntau siv rau dab tsi?
Monoethylene Glycol feem ntau yog siv rau hauv PET ntau lawm, tshuaj tiv thaiv kab mob, cua sov- hloov cov kua, thiab kev tsim tshuaj lom neeg.
Puas yog MEG flammable?
MEG yog combustible ntawm qhov kub thiab txias tab sis tsis cais raws li cov nplaim taws heev nyob rau hauv ib txwm muaj mob.
Vim li cas MEG siv los tiv thaiv khov?
Vim tias nws txo qis cov ntsiab lus khov thiab ua rau cov ntsiab lus kub ntawm cov dej-raws li tshuab.
Dab tsi ntawm MEG yog siv rau polyester ntau lawm?
Fiber-qib MEG nrog Ntau dua lossis sib npaug rau 99.9% purity feem ntau yuav tsum tau.
Xaus
Mono Ethylene Glycol (MEG) yog ib qho tseem ceeb petrochemical raw khoom siv thoob plaws polyester manufacturing, antifreeze systems, thiab industrial siv tshuaj.
Nws ua ke ntawm thermal stability, dej miscibility, thiab reactivity ua rau nws yog ib qho tseem ceeb feedstock nyob rau hauv lub ntiaj teb no industrial mov chains.
Nrog kev loj hlob tsis tu ncua ntawm polyester xav tau thiab kev lag luam cua txias tshuab, MEG tseem ruaj khov siab -cov khoom lag luam tshuaj nyob hauv lub ntiaj teb ua lag luam.