Tetrahydrofuran/CAS:109-99-9

Tetrahydrofuran, oo loo soo gaabiyo THF, waa isku-dhis dabiici ah oo heterocyclic ah. Iyada oo ka tirsan fasalka ether, waa wax soo saar si buuxda u hawo-geliyey oo ka mid ah isku-darka udgoonka furan. Tetrahydrofuran waa mid ka mid ah ether-yada ugu xooggan ee polar-ka, oo loo isticmaalo sidii dareere dhexdhexaad ah oo polarity ah oo ku jira falgallada kiimikada iyo soo saarista. Waa dareere aan midab lahayn oo isbeddelaya heerkulka qolka, oo leh ur la mid ah ether. Waxaa lagu milmaa inta badan dareerayaasha dabiiciga ah sida biyaha, ethanol, ether, acetone, iyo benzene, waxaa loo yaqaan "dareeraha caalamiga ah". Heerkulka qolka, qayb ahaan waa la isku qasi karaa biyaha, ganacsatada reagents-ka sharci-darrada ahna waxay ka faa'iidaystaan ​​​​tan si ay u sameeyaan faa'iido weyn iyagoo ku qasaya reagents-ka tetrahydrofuran biyaha. Sababtoo ah u janjeera THF inay samayso peroxides inta lagu jiro kaydinta, alaabada warshadaha guud ahaan waxay ku daraan antioxidant BHT. Qoyaanka ≤ 0.2%. Waxay leedahay astaamaha sunta yar, dhibic karkaraya oo yar, iyo dareere wanaagsan.

Isticmaalka

1. falgalka isku-darka ee walxaha ceeriin ah ee tetrahydrofuran laftiisu wuxuu noqon karaa polycondensation (iyadoo la adeegsanayo polymerization-ka furitaanka cation-ka) oo loo beddelo polytetramethylene ether glycol (PTMEG), oo sidoo kale loo yaqaan tetrahydrofuran homopolymerization ether. PTMEG iyo toluene diisocyanate (TDI) oo laga sameeyay xoqid, u adkaysta saliidda, waxqabadka heerkulka hooseeya, xoog sare oo ka mid ah caagagga gaarka ah; iyo dimethyl terephthalate iyo 1,4-butanediol oo laga sameeyay walxaha polyether polyether polyester elastomer. Cufnaanta molecular ee qaraabada ah ee PTT waa 2,000. Cufnaanta molecular-ka ee 2000 PTMEG iyo p-methylene bis (4-phenyl) diisocyanate (MDI) oo laga sameeyay fiilooyinka polyurethane ee laastikada ah (spandex, faybarka SPANDEX), cinjirro gaar ah iyo dahaadh gaar ah oo loogu talagalay walxaha ceeriin ah. THF waa isticmaalka ugu muhiimsan ee loo isticmaalo soo saarista PTMEG, sida laga soo xigtay tirakoobyada qallafsan, in ka badan 80% THF-ka adduunka ayaa loo isticmaalaa soo saarista PTMEG, iyo PTMEG, iyo PTMEG, iyo PTMEG, iyo PTMEG, iyo PTMEG, iyo PTMEG, iyo PTMEG, iyo PTMEG. PTMEG, iyo PTMEG waxaa inta badan loo isticmaalaa soo saarista fiilooyinka spandex ee laastikada ah.
2. dareere waxqabad oo aad u fiican tetrahydrofuran waa dareere wanaagsan oo si caadi ah loo isticmaalo, gaar ahaan milmida PVC, polyvinylidene chloride iyo butylaniline, oo si weyn loogu isticmaalo dareere ahaan dahaarka dusha sare, dahaarka ka hortagga daxalka, khad daabacan, cajalado iyo dahaarka filimka ee electro-Chemicalbook Aluminum Plating Liquid waxaa si aan kala sooc lahayn loo xakamayn karaa dhumucda aluminiumka iyo Iftiinka. Dahaarka cajaladda magnetic-ga, dahaarka dusha sare ee PVC, nadiifinta falgalka PVC, ka saarista filimka PVC, dahaarka cellophane, khad daabacan oo balaastig ah, dahaarka polyurethane ee thermoplastic, dareereyaasha dhejiska, si ballaaran loogu isticmaalo dahaarka dusha sare, dahaarka ilaalinta, khad, soosaarayaasha iyo wakiilada daaweynta dusha sare ee maqaar macmal ah oo macmal ah.
3. Waxaa loo isticmaalaa walxo ceeriin ah oo loogu talagalay isku-darka dabiiciga ah sida daawooyinka loo isticmaalo soo saarista tetrahydrothiophene, 1.4 - dichloroethane, 2.3 Waxaa loo isticmaalaa in lagu soo saaro tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyrolactone iyo pyrrolidone. Warshadaha dawooyinka, waxaa loo isticmaalaa isku-darka qufaca, Rifamycin, progesterone iyo qaar ka mid ah daawooyinka hoormoonka. Tetrahydrothiophenol waxaa soo saara daaweynta hydrogen sulfide, kaas oo loo isticmaali karo ur ahaan gaaska shidaalka (ku-darka aqoonsiga), waana dareeraha ugu weyn ee warshadaha dawooyinka.
4. Adeegsiyo Kale Dareeraha Chromatographic (jel permeation chromatography), oo loo isticmaalo dhadhanka gaaska dabiiciga ah, dareeraha loogu talagalay soo saarista acetylene, iyo xasiliyeyaasha iftiinka ee agabka polymer-ka. Iyada oo la adeegsanayo ballaaran ee tetrahydrofuran, gaar ahaan kobaca degdegga ah ee warshadaha spandex ee Shiinaha sannadihii ugu dambeeyay, ayaa ka dhigaya baahida Shiinaha ee PTMEG inay sii kordhayso, baahida ka dhalatay tetrahydrofuran sidoo kale waa isbeddel si dhakhso ah u koraya.

Baakadeynta iyo Rarista

180KG/Durbaan ama sida looga baahan yahay macaamiisha.
Waxaa lagu keeni karaa bad iyo hawada

Hayso oo kaydi

Muddada shelf-ka: 24 bilood laga bilaabo taariikhda la sameeyay ee baakadaha asalka ah ee aan la furin lagu kaydiyay meel qabow oo qalalan oo ka fog iftiinka qorraxda tooska ah, biyaha.
Bakhaar hawo leh, Qallajin heerkul hooseeya, Ka soocan oksaydhiyeyaasha, asiidhyada.