Ethylene Glycol Antimoni

Ethylene Glycol Antimony / Antimony Triglycolate – Katundu wa Fizikokemikali

Kufotokozera kwa Makampani a Ethylene Glycol Antimony

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Kodi malo ogwiritsira ntchito antimony glycol ndi ati komanso momwe amagwiritsidwira ntchito?

I. Madera Ofunikira Kwambiri

Antimony glycolate ndi chothandizira kwambiri, choyera kwambiri, cha organometallic polycondensation, chomwe chimagwiritsidwa ntchito makamaka mumakampani opanga ma polyester, makamaka mu njira zosungunulira polycondensation pogwiritsa ntchito terephthalic acid (PTA) ndi ethylene glycol (EG) ngati zopangira. Makamaka, chimakhudza magawo ang'onoang'ono otsatirawa:

1. Kupanga utomoni wa polyester (PET)
- Zidutswa za polyester zopangidwa ndi ulusi (za ulusi wofunikira wa polyester ndi ulusi)
- Zidutswa za polyester zapamwamba m'mabotolo (za madzi akumwa, zakumwa zoziziritsa kukhosi, mabotolo otentha, ndi zina zotero)
- Ma chips a polyester apamwamba kwambiri (a mafilimu owonera, mafilimu oteteza magetsi, ndi mafilimu opaka)

2. Ma polyester ndi ma copolyester osinthidwa
- Polyester yotsika ya diethylene glycol (DEG)
- Polyester yopaka utoto ya Cationic (CDP)
- Dongosolo lothandizira pang'ono la polybutylene terephthalate (PBT) (limafuna kapangidwe kake)

3. Njira Yobwezeretsanso Polyester ndi Kulimbitsa Kukhuthala
- Kusungunula ndi kukhuthala kwa zinyalala za PET (gawo la SSP lokonzekera)
- Polycondensation catalysis yothandiza kwambiri ya polycondensation ya polyester yobwezeretsedwanso (r-PET)

II. Ntchito Zapadera ndi Ubwino Waukadaulo

Antimony glycolate imalowa m'malo mwa ma catalyst achikhalidwe (monga antimony trioxide ndi antimony acetate) mu polyester polycondensation reactions, ndipo ntchito zake zenizeni ndi kusintha kwa magwiridwe antchito ndi motere:

1. Kuchita bwino kwambiri kwa catalytic polycondensation reaction, kuwonjezera mphamvu zopangira.
- Ntchito: Monga chothandizira chachikulu, chimathandizira gawo la polycondensation pambuyo pa transesterification kapena direct esterification, ndikuwonjezera kwambiri kuchuluka kwa polymerization.
- Zotsatira: Ndi kuchuluka komweko kwa antimoni, nthawi yochitira zinthu imachepetsedwa ndi 10%–15%; kapena mkati mwa nthawi yomweyo, mulingo wa polymerization (DP) ndi kukhuthala kwa mkati (IV) zimakhala zapamwamba, ndipo phindu la malo a chipangizocho limawonjezeka.

2. Chepetsani kuchuluka kwa antimoni komwe kumatsalira mu chinthu chomalizidwa kuti chikwaniritse zofunikira zobiriwira komanso zoteteza chilengedwe.
- Kugwiritsa Ntchito: Chifukwa cha mphamvu yake yayikulu yopangira zinthu, kuchuluka komwe kumafunika kuwonjezera ndi 60%–70% yokha ya zinthu zoyambira (zochokera pa chinthu cha antimony).
- Zotsatira: Kuchuluka kwa Sb komwe kumatsalira mu ma PET chips kumatha kulamulidwa mokhazikika pa ≤150 ppm, ndipo ma tchipisi ena apamwamba a mabotolo amatha kukhala otsika kwambiri mpaka ≤100 ppm, omwe ndi otsika kwambiri kuposa 200–250 ppm ya antimony acetate system, kukwaniritsa zoletsa pakusamutsa zinthu zokhudzana ndi chakudya zomwe zakhazikitsidwa ndi EU, US FDA ndi akuluakulu ena.

3. Sinthani mtundu ndi mawonekedwe a zinthu za polyester
- Ntchito: Antimony glycol imasungunuka kwathunthu ndipo imafalikira mofanana mu reaction system, kupewa kuchulukitsa kwa catalysis kapena kusonkhana kwa zitsulo.
- Zotsatira: Mtengo wa b (yellowness index) wa ma PET chips opangidwa umachepetsedwa ndi mayunitsi 1-2 poyerekeza ndi dongosolo la antimony trioxide, pomwe mtengo wa L (kuwala) umakwera, zomwe zimapangitsa kuti zikhale zoyenera kwambiri popanga mafilimu optical ndi ulusi wowala kwambiri.

4. Chepetsani zotsatira zoyipa ndikuwongolera zizindikiro za khalidwe la malonda.
- Kugwiritsa ntchito: Kuchepetsa zotsatira zoyipa monga ethylene glycol etherification ndikuletsa kupangika kwa diethylene glycol (DEG).
- Zotsatira: Kuchuluka kwa DEG mu PET kumatha kulamulidwa pa ≤0.8% (poyerekeza ndi pafupifupi 1.0%–1.2% mu machitidwe achizolowezi), kukonza malo osungunuka ndi kukhazikika kwa kutentha, ndikuwonjezera magwiridwe antchito ozungulira ndi kupanga mowolowa manja.

5. Konzani bwino spinnability mukamaliza kukonza kuti muchepetse kusweka kwa chitsulo.
- Ntchito: Zotsalira za catalytic ndi zofanana komanso zopyapyala kwambiri mu kukula kwa tinthu tating'onoting'ono (palibe chinthu chopachikidwa pambuyo posungunuka), ndipo sizimatseka chophimba cha fyuluta cha chozunguliracho.
- Zotsatira: Kusweka kwa ulusi wa polyester kumachepetsedwa ndi kupitirira 30%, mphamvu ya ulusi ndi kufanana kwa kutalika kumawonjezeka, ndipo kuchuluka kwa zinthu zabwino kwambiri kumatha kufika 100%.

6. Kugwiritsa ntchito mosavuta komanso kusinthasintha kwa chipangizocho
- Kugwiritsa Ntchito: Ikhoza kusungunuka mwachindunji mu ethylene glycol kuti ikonze njira yolumikizirana yolumikizirana (kuchuluka kwa 2%–5%), zomwe zimathandiza kuyeza ndi kudyetsa mosalekeza komanso molondola.
- Zotsatira: Zimapewa chiopsezo cha mvula yomwe imabwera chifukwa cha hydrolysis ya antimony acetate, komanso zimachotsa kufunika kwa njira yopera ndi kufalitsa antimony trioxide, zomwe zimapangitsa kuti ikhale yoyenera zomera zazikulu za polyester (zotulutsa zamtundu umodzi tsiku lililonse za matani mazana ambiri kapena kuposerapo).

III. Zolemba Zowonjezera (Malangizo Osankha)

Poyerekeza ndi antimony acetate, antimony glycol ili ndi kutentha kwakukulu ndipo siitha kusungunuka kapena kuwola pang'ono pa kutentha kwa polycondensation pamwamba pa 300°C, motero imachepetsa kuyika kwa antimony m'mapaipi opumira.
- Poyerekeza ndi antimony trioxide: Antimony glycol ili ndi kusungunuka kwa >10% (gawo lalikulu, 80℃) mu ethylene glycol, pomwe antimony trioxide ili ndi kusungunuka kochepera 0.1%, motero kufalikira kwake ndi ntchito yake yoyambirira ndizabwino kwambiri kuposa yomaliza.
- Zoletsa kugwiritsa ntchito: Sizoyenera machitidwe opanda antimoni (monga mabotolo ena otentha ndi ma phukusi azachipatala), koma zingagwiritsidwe ntchito ngati yankho losinthira pakuchepetsa antimoni.