Tetrahydrofuran

Tetrahydrofuran, chidule cha THF, ndi mankhwala achilengedwe a heterocyclic. Ali m'gulu la ether, ndi mankhwala a aromatic compound furan compound complete hydrogenation.

Tetrahydrofuran ndi imodzi mwa ma ether amphamvu kwambiri a polar. Imagwiritsidwa ntchito ngati chosungunulira chapakati cha polar mu zochita za mankhwala ndi kutulutsa. Ndi madzi osasinthasintha omwe alibe mtundu kutentha kwa chipinda ndipo ali ndi fungo lofanana ndi ether. Imasungunuka m'madzi, ethanol, ether, acetone, Chemicalbook benzene ndi zosungunulira zina zambiri zachilengedwe, zomwe zimadziwika kuti "Universal solvent". Pa kutentha kwa chipinda ndi madzi zimatha kusakanikirana pang'ono, bizinesi ina yosaloledwa ya reagent ndikugwiritsa ntchito mfundo iyi ku tetrahydrofuran reagent water profiteer. Chifukwa cha chizolowezi cha THF chopanga peroxides mu kusungira, antioxidant BHT nthawi zambiri imawonjezeredwa kuzinthu zamafakitale. Chinyezi ≦0.2%. Chili ndi mawonekedwe a poizoni wochepa, kutentha kochepa komanso kusinthasintha kwabwino.

Kapangidwe ka mankhwala:Madzi owonekera opanda mtundu, okhala ndi fungo la etha. Osakanikirana ndi madzi, mowa, ketone, benzene, ester, etha, ndi ma hydrocarbon.

Ntchito zazikulu:

1. Zipangizo zopangira spandex synthesis reaction:

Tetrahydrofuran yokha ikhoza kukhala polycondensation (ndi cationic ring-opening repolymerization) mu polytetramethylene ether diol (PTMEG), yomwe imadziwikanso kuti tetrahydrofuran homopolyl. PTMEG ndi toluene diisocyanate (TDI) zopangidwa ndi kukana kukalamba, kukana mafuta, kutentha kochepa, mphamvu yayikulu ya rabara yapadera; Zida zotchinga za polyester za Block polyether zinakonzedwa ndi dimethyl terephthalate ndi 1, 4-butanediol. PTMEG yokhala ndi kulemera kwa maselo a 2000 ndi p-methylene bis (4-phenyl) diisocyanate (MDI) kuti ipange polyurethane elastic fiber (SSPANDEX fiber), rabara yapadera ndi zinthu zina zapadera zokutira. Ntchito yofunika kwambiri ya THF ndikupanga PTMEG. Malinga ndi ziwerengero zoyambira, pafupifupi 80% ya THF yapadziko lonse lapansi imagwiritsidwa ntchito popanga PTMEG, ndipo PTMEG imagwiritsidwa ntchito kwambiri popanga spandex fiber.

2. Chosungunulira chomwe chimagwira ntchito bwino kwambiri:

Tetrahydrofuran ndi chosungunulira chabwino kwambiri chomwe chimagwiritsidwa ntchito kwambiri, makamaka choyenera kusungunula PVC, polyvinylidene chloride ndi butyl aniline, chomwe chimagwiritsidwa ntchito kwambiri ngati chophimba pamwamba, chophimba choletsa kuwononga, inki yosindikizira, tepi ndi chophimba cha filimu, ndipo Chemicalbook mu electroplating aluminiyamu madzi imatha kulamulira makulidwe ndi kuwala kwa aluminiyamu. Chosungunulira cha tepi, chophimba pamwamba pa PVC, kuyeretsa PVC reactor, kuchotsa filimu ya PVC, chophimba cha cellophane, inki yosindikizira pulasitiki, chophimba cha polyurethane cha thermoplastic, zomatira, zomwe zimagwiritsidwa ntchito kwambiri mu chophimba pamwamba, chophimba choteteza, inki, zotulutsa ndi zochizira pamwamba pa chikopa chopangidwa.

3. Amagwiritsidwa ntchito ngati zipangizo zopangira zinthu zachilengedwe monga mankhwala:

Popanga tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyl lactone ndi pyrrolidone. Mu makampani opanga mankhwala, imagwiritsidwa ntchito popanga coughbixin, rifumycin, progesterone ndi mankhwala ena a mahomoni. Tetrahydrothiophenol imapangidwa ndi hydrogen sulfide treatment, yomwe ingagwiritsidwe ntchito ngati fungo mu mpweya wamafuta (chowonjezera chozindikiritsa), komanso ndiyo solvent yayikulu mumakampani opanga mankhwala.

4. Ntchito Zina:

Chosungunulira cha chromatographic (gel permeation chromatography), chomwe chimagwiritsidwa ntchito popangira kukoma kwa gasi wachilengedwe, chosungunulira cha acetylene extraction, chokhazikitsa kuwala kwa polymer, ndi zina zotero. Chifukwa cha kugwiritsidwa ntchito kwakukulu kwa tetrahydrofuran, makamaka m'zaka zaposachedwa, kukula kwachangu kwa mafakitale a polyurethane, kufunikira kwa PTMEG m'dziko lathu kukuwonjezeka, ndipo kufunikira kwa tetrahydrofuran kukuwonetsanso kukula kwachangu.

Ngozi:Tetrahydrofuran ndi ya gulu la madzi oyaka moto a kalasi 3.1 okhala ndi malo ochepa oyaka, oyaka kwambiri, nthunzi imatha kupanga kusakaniza kophulika ndi mpweya, malire ophulika ndi 1.5% ~ 12% (gawo la voliyumu), ndi kuyabwa. Chikhalidwe chake choyaka kwambiri ndi chiopsezo chachitetezo. Chodetsa nkhawa chachikulu cha chitetezo cha THFS ndi kupanga pang'onopang'ono kwa ma peroxide ophulika kwambiri a organic akamakumana ndi mpweya. Kuti achepetse chiopsezochi, ma THFS omwe amapezeka m'masitolo nthawi zambiri amawonjezeredwa ndi 2, 6-di-tert-butylp-cresol (BHT) kuti aletse kupanga ma peroxide a organic. Nthawi yomweyo, THF sayenera kuumitsidwa chifukwa ma peroxide a organic adzakhazikika mu zotsalira za distillation.

Zitetezo zogwirira ntchito:Kugwira ntchito motsekedwa, mpweya wokwanira. Ogwira ntchito ayenera kuphunzitsidwa mwapadera ndikutsatira mosamala njira zogwirira ntchito. Akulimbikitsidwa kuti ogwira ntchito azivala chigoba cha gasi chofanana ndi fyuluta (theka la chigoba), magalasi oteteza chitetezo, zovala zoteteza kutentha, ndi magolovesi osapsa ndi mafuta. Sungani kutali ndi moto, gwero la kutentha, musasute fodya kuntchito. Gwiritsani ntchito makina ndi zida zopumira mpweya zosaphulika. Pewani nthunzi kuti isatuluke mumlengalenga wa kuntchito. Pewani kukhudzana ndi ma oxidants, ma acid ndi maziko. Kuthamanga kwa madzi kuyenera kulamulidwa panthawi yodzaza, ndipo payenera kukhala chipangizo chothira pansi kuti mupewe kusonkhana kwa magetsi. Pogwira ntchito, kunyamula ndi kutsitsa zinthu pang'ono kuyenera kuchitika kuti mupewe kuwonongeka kwa ma CD ndi ziwiya. Mukhale ndi zida zosiyanasiyana komanso kuchuluka kwa zida zoyatsira moto komanso kutayikira kwa zida zochizira mwadzidzidzi. Chidebe chopanda kanthu chingakhale ndi zotsalira zovulaza.

Malangizo Osungira Zinthu:Kawirikawiri katunduyo amakhala ndi choletsa. Sungani m'nyumba yosungiramo zinthu yozizira komanso yopuma mpweya. Sungani kutali ndi moto ndi kutentha. Kutentha kwa nyumba yosungiramo zinthu sikuyenera kupitirira 30℃. Phukusilo liyenera kutsekedwa ndipo lisakhudze mpweya. Liyenera kusungidwa padera ndi oxidizers, acids ndi maziko, ndipo lisasakanizidwe. Malo owunikira ndi mpweya wopumira amagwiritsidwa ntchito. Musagwiritse ntchito zida zamakina ndi zida zomwe zimatha kuphulika. Malo osungiramo zinthu ayenera kukhala ndi zida zothandizira mwadzidzidzi zomwe zimatuluka ndi zinthu zoyenera zogwirira.

Kupaka: 180KG/ng'oma