Tetrahydrofuran

Tetrahydrofuran, chidule cha THF, ndi heterocyclic organic pawiri.Ndi wa kalasi etere, ndi onunkhira pawiri furan wathunthu hydrogenation mankhwala.

Tetrahydrofuran ndi imodzi mwa ma ether amphamvu kwambiri a polar.Amagwiritsidwa ntchito ngati sing'anga polar zosungunulira mu zochita mankhwala ndi m'zigawo.Ndi madzi osungunuka opanda mtundu pa kutentha kwa chipinda ndipo ali ndi fungo lofanana ndi ether.Zosungunuka m'madzi, ethanol, etha, acetone, Chemicalbook benzene ndi zosungunulira zina zambiri, zomwe zimadziwika kuti "universal solvent".Pa firiji ndi madzi akhoza pang'ono miscible, ena oletsedwa reagent malonda ndi ntchito mfundo imeneyi tetrahydrofuran reagent madzi profiteer.Chifukwa cha chizolowezi cha THF kupanga peroxides posungira, antioxidant BHT imawonjezeredwa kuzinthu zamakampani.Chinyezi ≦0.2%.Iwo ali ndi makhalidwe a otsika kawopsedwe, otsika kuwira mfundo ndi fluidity wabwino.

Chemical katundu:madzi owoneka bwino opanda mtundu, okhala ndi fungo la ether.Zosakaniza ndi madzi, mowa, ketone, benzene, ester, ether, ndi ma hydrocarbon.

Ntchito zazikulu:

1. Zopangira za spandex synthesis reaction:

Tetrahydrofuran yokha ikhoza kukhala polycondensation (by cationic ring-opening repolymerization) mu polytetramethylene ether diol (PTMEG), yomwe imadziwikanso kuti tetrahydrofuran homopolyl.PTMEG ndi toluene diisocyanate (TDI) yopangidwa ndi kukana kuvala, kukana mafuta, kutsika kwa kutentha, mphamvu yapamwamba ya rabara yapadera;Block polyether polyester zotanuka zakuthupi zinakonzedwa ndi dimethyl terephthalate ndi 1, 4-butanediol.PTMEG yokhala ndi mamolekyu olemera a 2000 ndi p-methylene bis (4-phenyl) diisocyanate (MDI) kuti apange polyurethane zotanuka CHIKWANGWANI (SPANDEX CHIKWANGWANI), mphira wapadera ndi cholinga china chapadera zokutira zopangira.Kugwiritsa ntchito kofunikira kwambiri kwa THF ndikupanga PTMEG.Malinga ndi ziwerengero zovuta, pafupifupi 80% ya THF yapadziko lonse lapansi imagwiritsidwa ntchito popanga PTMEG, ndipo PTMEG imagwiritsidwa ntchito kwambiri popanga ulusi wa spandex.

2. Zosungunulira zogwira ntchito bwino kwambiri:

Tetrahydrofuran ndi ambiri ntchito zosungunulira zabwino kwambiri, makamaka oyenera Kutha PVC, polyvinylidene mankhwala enaake ndi butyl aniline, chimagwiritsidwa ntchito monga pamwamba ❖ kuyanika, anticorrosive ❖ kuyanika, inki yosindikiza, tepi ndi filimu ❖ kuyanika zosungunulira, ndi Chemicalbook mu electroplating zotayidwa madzi akhoza kumangokhalira kulamulira zotayidwa. makulidwe osanjikiza ndi owala.Zosungunulira kwa ❖ kuyanika tepi, PVC pamwamba ❖ kuyanika, kuyeretsa PVC riyakitala, kuchotsa PVC filimu, cellophane ❖ kuyanika, pulasitiki kusindikiza inki, thermoplastic polyurethane ❖ kuyanika, zomatira, ambiri ntchito zokutira pamwamba, zokutira zoteteza, inki, extractants ndi wothandizila pamwamba mankhwala zikopa kupanga.

3. Amagwiritsidwa ntchito ngati zida zopangira organic synthesis monga mankhwala:

Popanga tetrahydrothiophene, 1.4- dichloroethane, 2.3- dichlorotetrahydrofuran, valerolactone, butyl lactone ndi pyrrolidone.M'makampani opanga mankhwala, amagwiritsidwa ntchito popanga coughbixin, rifumycin, progesterone ndi mankhwala ena a mahomoni.Tetrahydrothiophenol amapangidwa ndi hydrogen sulfide mankhwala, amene angagwiritsidwe ntchito ngati fungo wothandizila mafuta gasi (chizindikiritso chowonjezera), komanso ndi zosungunulira waukulu mu makampani mankhwala.

4. Ntchito Zina:

Chromatographic zosungunulira (gel osakaniza permeation chromatography), ntchito kununkhira kwa gasi, acetylene m'zigawo zosungunulira, polima zinthu kuwala stabilizer, etc. Ndi ntchito lonse la tetrahydrofuran, makamaka m'zaka zaposachedwapa, kukula mofulumira makampani polyurethane, kufunika kwa PTMEG wathu. dziko likuchulukirachulukira, ndipo kufunika kwa tetrahydrofuran kukuwonetsanso kukula kwachangu.

Ngozi:Tetrahydrofuran ndi kalasi 3.1 choyaka madzi ndi otsika kung'anima mfundo, kwambiri kuyaka, nthunzi akhoza kupanga kuphulika osakaniza ndi mpweya, kuphulika malire ndi 1.5% ~ 12% (voliyumu kachigawo), ndi mkwiyo.Chikhalidwe chake choyaka kwambiri chimakhalanso chowopsa.Chodetsa nkhawa kwambiri ndi chitetezo cha THFS ndi kupangika pang'onopang'ono kwa ma organic peroxides ophulika akakhala pamlengalenga.Pofuna kuchepetsa ngoziyi, THFS yomwe imapezeka pamalonda nthawi zambiri imawonjezeredwa ndi 2, 6-di-tert-butylp-cresol (BHT) kuti alepheretse kupanga organic peroxides.Nthawi yomweyo, THF siyenera kuuma chifukwa organic peroxides aziyika mu zotsalira za distillation.

Njira zodzitetezera:ntchito yotsekedwa, mpweya wabwino.Ogwira ntchito ayenera kuphunzitsidwa mwapadera ndikutsata ndondomeko zoyendetsera ntchito.Ndibwino kuti ogwira ntchito azivala chigoba cha gasi wamtundu wa sefa (chigoba cha theka), magalasi oteteza chitetezo, zovala zotsutsana ndi static, ndi magolovesi osamva mafuta a raba.Khalani kutali ndi moto, gwero la kutentha, osasuta fodya kuntchito.Gwiritsani ntchito makina opumira ndi mpweya wosaphulika.Pewani nthunzi kuthawira kumpweya wakuntchito.Pewani kukhudzana ndi okosijeni, zidulo ndi maziko.Kuthamanga kuyenera kuwongoleredwa pakudzaza, ndipo payenera kukhala chipangizo choyikirapo kuti chiteteze kuchulukira kwa electrostatic.Pogwira, kukweza ndi kutsitsa pang'ono kuyenera kuchitidwa pofuna kupewa kuwonongeka kwa zotengera ndi zotengera.Okonzeka ndi lolingana zosiyanasiyana ndi kuchuluka kwa moto zida ndi kutayikira mwadzidzidzi mankhwala zida.Chidebe chopanda kanthu chikhoza kukhala ndi zotsalira zoipa.

Kusamala posungira:Kawirikawiri chinthucho chimakhala ndi inhibitor.Sungani m'nyumba yosungiramo zinthu zoziziritsa kukhosi komanso mpweya wokwanira.Khalani kutali ndi moto ndi kutentha.Kutentha kwa nyumba yosungiramo katundu sikuyenera kupitirira 30 ℃.Phukusi liyenera kusindikizidwa osati kukhudzana ndi mpweya.Iyenera kusungidwa mosiyana ndi oxidizers, acids ndi maziko, ndipo sayenera kusakanikirana.Zowunikira zosaphulika komanso mpweya wabwino zimatengera.Osagwiritsa ntchito zida zamakina ndi zida zomwe zimakonda kuyaka.Malo osungiramo zinthu ayenera kukhala ndi zida zoperekera chithandizo chadzidzidzi zomwe zidatuluka komanso zida zoyenera zogwirira.

Kupaka: 180KG / ng'oma