Tetrahydrofuran

Tetrahydrofuran, oo loo soo gaabiyo THF, waa unug dabiici ah oo heterocyclic ah.Waxaa iska leh fasalka etherka, waa isku-dhafka caraf udgoon ee furan oo dhammaystiran wax soo saarka hydrogenation.

Tetrahydrofuran waa mid ka mid ah ether-yada ugu xoogan.Waxaa loo isticmaalaa sida dareere dhexdhexaad ah oo dabaylaha ah ee falcelinta kiimikada iyo soo saarista.Waa dareere aan midab lahayn oo isbeddelaya heerkulka qolka wuxuuna leeyahay ur la mid ah etherka.Ku milmay biyaha, ethanol, ether, acetone, kiimikooyinka benzene iyo kuwa kale ee ugu badan ee dareeraha organic, oo loo yaqaan "qalal caalami ah".Heerkulka qolka iyo biyuhu waxay noqon karaan qayb la khalkhal galin karo, qaar ka mid ah ganacsiyada reagent-ka ee sharci darrada ah waa in loo isticmaalo bartan tetrahydrofuran reagent biyaha faa'iido doonka ah.Sababtoo ah u janjeera THF si ay u sameeyaan peroxides kaydinta, antioxidant BHT waxaa caadi ahaan lagu daraa alaabta warshadaha.Waxyaabaha qoyaanka ah ≦0.2%.Waxay leedahay sifooyinka sunta hoose, dhibicda karkarinta hoose iyo dheecaanka wanaagsan.

Waxyaabaha kiimikaad:dareere hufan oo aan midab lahayn, oo leh caraf ether ah.Lagu qaso biyo, aalkolo, ketone, benzene, ester, ether, iyo hydrocarbons.

Codsiyada ugu muhiimsan:

1. Walxaha ceeriin ee falcelinta falcelinta spandex:

Tetrahydrofuran lafteedu waxay noqon kartaa kondensation (iyada oo loo marayo repolymerization furitaanka giraanta cationic) ee polytetramethylene ether diol (PTMEG), oo sidoo kale loo yaqaan tetrahydrofuran homopolyl.PTMEG iyo toluene diisocyanate (TDI) oo ka samaysan caabbinta xirashada, caabbinta saliidda, waxqabadka heerkulka hooseeya, xoogga sare ee caag gaar ah;Waxyaabaha laastikada ah ee polyether-ka ah waxaa lagu diyaariyey dimethyl terephthalate iyo 1, 4-butanediol.PTMEG oo leh miisaan kelli qaraabo ah 2000 iyo p-methylene bis (4-phenyl) diisocyanate (MDI) si ay u sameeyaan polyurethane elastic fiber (SPANDEX fiber), caag gaar ah iyo qaar ka mid ah ujeedo gaar ah daahan alaabta ceeriin.Isticmaalka ugu muhiimsan ee THF waa soosaarka PTMEG.Marka loo eego tirakoobyada qallafsan, qiyaastii 80% THF-da caalamiga ah waxaa loo isticmaalaa wax soo saarka PTMEG, PTMEG waxaa inta badan loo isticmaalaa soosaarka fiber spandex.

2. Ku milma waxqabad aad u wanaagsan:

Tetrahydrofuran waa dareere aad loo isticmaalo oo caadi ahaan loo isticmaalo, gaar ahaan ku habboon milanka PVC, chloride polyvinylidene iyo butyl aniline, oo si ballaaran loo isticmaalo sida daahan dusha sare, daahan anticorrosive, khad daabacan, cajalad iyo dareeraha daahan filimka, oo leh buug-kimiko ee dareeraha aluminium electroplating waxay noqon kartaa xakamaynta aluminium. dhumucda lakabka iyo dhalaalaya.Qalab loogu talagalay daahan cajaladda ah, daahan dusha PVC, nadiifinta reactor PVC, ka saarida filimka PVC, daahan cellophane, qalin daabacaadda caag ah, daahan polyurethane thermoplastic, koollada, caadi ahaan loo isticmaalo daahan dusha, daahan ilaalinta, khad, saarayaasha iyo wakiilada daaweynta dusha maqaarka synthetic.

3. Waxaa loo isticmaalaa sida alaabta ceeriin ee isku dhafka dabiiciga ah sida daawooyinka:

Si loo soo saaro tetrahydrothiophene, 1.4-dichloroethane, 2.3-dichlorotetrahydrofuran, valerolactone, butyl lactone iyo pyrrolidone.Warshadaha dawooyinka, waxaa loo isticmaalaa isku-dhafka qufaca, rifumycin, progesterone iyo daawooyinka hoormoonka qaarkood.Tetrahydrothiophenol waxaa soo saaray daawaynta hydrogen sulfide, taas oo loo isticmaali karo wakiilka ur ee gaaska shidaalka (wax lagu daro), sidoo kale waa dareeraha ugu weyn ee warshadaha dawooyinka.

4. Isticmaalka Kale:

Chromatographic dareere ah (gel permeation chromatography), loo isticmaalo dhadhan gaaska dabiiciga ah, dareere soo saaridda acetylene, polymer wax stabilizer iftiinka, iwm Iyadoo codsiga ballaaran ee tetrahydrofuran, gaar ahaan sannadihii la soo dhaafay, koritaanka degdegga ah ee warshadaha polyurethane, baahida loo qabo PTMEG ee our. waddanku wuu sii kordhayaa, iyo baahida loo qabo tetrahydrofuran waxay sidoo kale muujinaysaa korriin degdeg ah.

Khatarta:Tetrahydrofuran waxaa iska leh dareere guban kara fasalka 3.1 oo leh barta iftiimaya oo hooseeya, aad u ololaysa, uumiga wuxuu samayn karaa isku dhafka walxaha qarxa ee hawada, xadka qaraxa waa 1.5% ~ 12% (jajab mugga), oo leh xanaaq.Dabeecaddeeda aadka u gubanaysa sidoo kale waa khatar badbaado.Walaaca ugu weyn ee nabdoonaanta ee THFS waa samaynta gaabis ah ee peroxides organic aadka u qarxa marka ay la kulmaan hawada.Si loo yareeyo khatartan, THFS ganacsi ahaan la heli karo ayaa inta badan lagu kabaa 2, 6-di-tert-butylp-cresol (BHT) si loo joojiyo soo saarista peroxides organic.Isla mar ahaantaana, THF waa in aan la qalajin sababtoo ah peroxides organic waxay ku ururin doontaa hadhaaga nadiifinta.

Taxadirka hawlgalka:hawlgal xiran, hawo buuxda.Hawl-wadeenadu waa inay ahaadaan kuwo si gaar ah u tababaran oo si adag ugu hoggaansamaan nidaamka hawlgalka.Waxaa lagu talinayaa in hawl-wadeenadu xidhaan maaskaro gaas nooca shaandhada ah (maaskaro badh), muraayadaha badbaadada, dharka lidka-static, iyo galoofyada saliidda caagga u adkaysta.Ka fogow dabka, isha kulaylka, sigaar la'aan goobta shaqada.Isticmaal hababka hawo-qaadista ee aan qarxin iyo qalabka.Ka ilaali uumiga inuu u baxsado hawada goobta shaqada.Iska ilaali taabashada oksaydhiyeyaasha, acids iyo saldhigyada.Heerka socodka waa in la xakameeyo inta lagu jiro buuxinta, waana in uu jiro qalab dhulka hoostiisa ah si looga hortago koronto-ururinta.Marka la qabanayo, rarista fudud iyo dejinta waa in la sameeyaa si looga hortago burbur ku yimaada baakadaha iyo weelasha.Lagu qalabeeyay noocyada u dhigma iyo tirada qalabka dabka iyo qalabka daawaynta degdega ah ee daadsan.Weel madhan waxa ku jiri kara hadhaa waxyeello leh.

Taxaddar kaydinta:Caadiyan badeecadu waxay leedahay ka hortag.Ku kaydi bakhaar qabow oo hawo leh.Ka ilaali dabka iyo kulaylka.Heerkulka bakhaarka waa in aanu dhaafin 30 ℃.Xirmada waa in la xiraa oo aan la xiriirin hawada.Waa in si gooni ah loo kaydiyaa oksidizers, acids iyo bases, waana in aan la isku qasin.Nalalka aan qarxin iyo tas-hiilaadka hawo ayaa la qaatay.Ha isticmaalin qalabka farsamada iyo qalabka u nugul dhinbiilka.Aagga kaydinta waa in lagu qalabeeyaa qalabka daawaynta degdega ah ee daadsan iyo agab ku habboon.

Baakadaha: 180KG/durbaan