Vim li cas MEG Monoethylene Glycol (CAS 107-21-1) Siv hauv Polyester Ntau Lawm?

MEG Monethylene Glycol (CAS 107-21-1)yog ib qho tseem ceeb raw khoom nyob rau hauv lub teb ntawm polyester manufacturing, raws li nws reacts nrog Purified Terephthalic Acid (PTA) los yog Dimethyl Terephthalate (DMT) los tsim Polyethylene Terephthalate (PET). Cov ntaub ntawv polymeric no tau siv dav hauv kev tsim khoom ntawm textiles, ntim khoom, thiab ntau yam khoom siv.

MEG (Monoethylene Glycol) yog dab tsi?

MEG (Monoethylene Glycol) yog xim tsis muaj xim, hygroscopic, thiab qis -volatility organic compound uas yog cov tsev neeg diol. Nws cov qauv molecular nta ob pawg hydroxyl ({2}}OH) ua haujlwm, uas ua rau nws muaj cov tshuaj lom neeg tshwj xeeb hauv esterification thiab polycondensation cov tshuaj tiv thaiv. Cov tshuaj formula rau MEG yog C₂H₆O₂, thiab nws tus lej CAS yog 107-21-1.

Puas yog Ethylene Glycol thiab Monoethylene Glycol tib yam?

Yog lawm, lawv yog cov tib yam nkaus xwb. "Monoethylene glycol" tsuas yog nws lub npe tshuaj meej meej, npaj kom paub qhov txawv ntawm ntau yam -unit compounds xws li diethylene glycol (DEG) lossis triethylene glycol (TEG).

Basic Chemical Information

Kev tsim khoom

MEG Monoethylene Glycol tshuaj ua haujlwm tseem ceeb raw khoom rau polyester fiber, resin thiab antifreeze cov khoom, manufactured chiefly los ntawm ethylene oxidation thiab tom qab hydration cov tshuaj tiv thaiv.

1. Ethylene Oxidation

Ethylene gas undergoes catalytic oxidation nrog oxygen nyob rau hauv silver oxide catalyst, ntawm 200 - 300℃thiab 10-30 atm kom yield ethylene oxide. Kev tswj nruj nruj tiv thaiv kev tsis txaus siab tshaj-oxidation.

2. Ethylene Oxide Hydration

Cov dej ntws tawm hauv cov kua qaub nruab nrab ntawm 50-70℃thiab 1-3 atm. Cov tshuaj tiv thaiv tsim MEG, nrog rau DEG thiab TEG raws li cov khoom lag luam thib ob.

3. Kev sib cais thiab kev huv

Distillation thev naus laus zis cais MEG tsim nyog los ntawm cov khoom sib xyaw. Sib cais los ntawm - cov khoom siv rov ua dua tshiab rau lwm qhov kev lag luam siv.

4. Kev soj ntsuam zoo thiab ntim khoom

Cov khoom tiav dhau los ua pov thawj zoo, tom qab ntawd ua kom txias, ntim thiab warehouses rau kev lag luam ncig.
MEG ntau lawm nta muaj zog noj. Bio-raws li cov ntaub ntawv ethylene tau siv ntau zuj zus los tsim cov bios ruaj khov-MEG thiab qis dua kev cia siab rau cov peev txheej petrochemical.

Vim li cas MEG mono ethylene glycol siv hauv Polyester ntau lawm?

Mono ethylene glycol yog qhov tseem ceeb rau kev tsim polyester vim tias nws ua haujlwm zoo nrog PTA lossis DMT los tsim cov ester txuas uas tsim PET polymer chains.

Cov txheej txheem tseem ceeb muaj peb kauj ruam:

• Esterification / transesterification
• Polycondensation
• Molecular saw kev loj hlob

Hauv cov tshuaj tiv thaiv yooj yim:
nHOCH2​CH2OH+nHOOC−C6H4​−COOH →[−OCH2​CH2​OCOC6H4​CO−]n+2nH2​O

• MEG muab cov pab pawg hydroxyl
• Terephthalic acid muab cov pab pawg carboxylic acid
• Lawv rov ua dua cov ntaub ntawv PET polymer chains

Monethylene Glycolmuaj ib tug symmetrical difunctional qauv, ua rau nws zoo tagnrho raw khoom rau zus tau tej cov high - zog, linear polyester polymers.

Vim li cas MEG glycol zoo tagnrho rau PET Manufacturing

Bifunctional Molecular Structure:
MEG (HO-CH₂-CH₂-OH) muaj ob pawg reactive hydroxyl. Nws cov qauv yooj yim, symmetrical ua rau nws hnov ​​​​mob ntawm ob qho kawg thaum lub sijhawm polymerization, txhawb nqa cov saw txuas ntxiv thiab siab -molecular- hnyav polymer tsim.
Qhov no yog qhov tseem ceeb rau PET lub zog fiber ntau, yaj viscosity, thermal stability, thiab kev ua haujlwm txhua yam.

Siab Reactivity nrog PTA & DMT:
MEG glycol reacts zoo nrog purified terephthalic acid (PTA) thiab dimethyl terephthalate (DMT). Qhov no xa cov esterification sai dua, tswj cov polymer loj hlob, tsawg dua byproducts, thiab ua tau zoo -scale ua.
Nws qhov me me me me me kuj tseem txhim kho kev nthuav dav thiab cov tshuaj tiv thaiv kinetics hauv polyester reactors.

Thermal thiab Mechanical Stability

Polyesters ua ke nrog MEG nthuav tawm cov khoom sib npaug xws li:

CAS 107-21-1 MEG Raw Khoom Muag hauv Suav teb

Lub luag haujlwm hauv Polyester Production

Monoethylene glycol (MEG) yog ib qho tseem ceeb ntawm cov khoom siv raw hauv cov txheej txheem tsim polyester. Los ntawm cov tshuaj tiv thaiv polycondensation, nws ua ke nrog terephthalic acid los ua ib qho ntev - chain polymers.

• Polyester Fibers:Molten PET yog extruded los ntawm spinnerets los tsim fibers, uas yog tom qab siv nyob rau hauv zus tau tej cov textiles thiab khaub ncaws.
• PET Plastics:Nws tuaj yeem ua tiav rau hauv PET resin, uas yog siv dav hauv kev tsim cov fwj yas, ntim zaj duab xis, thiab ntim khoom noj.

Lwm qhov chaw thov:
Txawm hais tias polyester ntau lawm tseem yog qhov loj tshaj plaws thoob ntiaj teb daim ntawv thov sector rau MEG, nws kuj plays lub luag haujlwm tseem ceeb hauv cov hauv qab no:

• Antifreeze thiab Coolants:Vim nws qhov qis qis qis thiab kub kub siab, MEG yog ib qho tseem ceeb ntawm cov tshuab cua txias.
• De-Cov kua dej icing:Nws yog siv los tsim cov dav hlau de- cov tshuaj icing nrog rau de- kev kho mob icing ntawm tshav dav hlau khiav.
• Industrial Intermediates:Nws ua haujlwm raws li cov khoom siv raw rau kev tsim khoom ntawm ntau yam khoom, nrog rau cov resins, plasticizers, thiab hydraulic kua.

Hais txog peb

Raws li ib tug ua chaw tsim tshuaj paus thiab exporter ntawm tshuaj solvent,TIANJIN GNEE BIOTECH CO., LTD.muab siab -cov tshuaj muaj txiaj ntsig zoo. Peb muab rau cov neeg siv khoom thoob plaws kev lag luam tshuaj, tshuaj, thiab cov khoom siv, ua kom zoo ib yam, txhim khu kev qha logistics, thiab kev txhawb nqa kev tshaj lij.

Peb cov khoom siv tshuaj muaj ntawv pov thawj thoob ntiaj teb (REACH, ISO, FMQS, HALAL) rau kev lees paub thoob ntiaj teb. Peb muaj warehouses nyob rau hauv coreports xws li Qingdao, Tianiin, thiab Shanghai, nrog ib tug 15-hnub kev pab xa khoom.

Lwm Yam Kub- Muag Khoom

Gneebio Khoom ntim khoom

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