Tetrahydrofuran

Tetrahydrofuran, i-THF efinyeziweyo, i-heterocyclic organic compound.Yeyodidi lwe-ether, yimveliso ye-hydrogenation enevumba elimnandi.

I-Tetrahydrofuran yenye yezona zomeleleyo ze-polar ethers.Isetyenziswe njenge-solvent ye-polar ephakathi kwi-chemical reactions kunye ne-extraction.Lulwelo olungenambala oluguquguqukayo olukwiqondo lobushushu begumbi kwaye lunevumba elifana ne-ether.Inyibilika emanzini, i-ethanol, i-ether, i-acetone, i-Chemicalbook benzene kunye nezinye izinyibilikisi ezininzi eziphilayo, ezaziwa ngokuba "zinyibilikisi zendalo yonke".Kwiqondo lokushisa kunye namanzi anokuthi axutywe ngokuyinxenye, ishishini elithile elingekho mthethweni le-reagent kukusebenzisa le ngongoma kwi-tetrahydrofuran reagent water profiteer.Ngenxa yokutyekela kwe-THF ukwenza iiperoxides kwindawo yokugcina, i-antioxidant BHT yongezwa ngokuqhelekileyo kwiimveliso zoshishino.Umxholo wokufuma ≦0.2%.Ineempawu zobutyhefu obuphantsi, indawo ebilayo ephantsi kunye nolwelo oluhle.

Iimpawu zemichiza:ulwelo olungenambala olucacileyo, olunevumba leether.Ixutywe namanzi, utywala, iketone, benzene, ester, ether, kunye neehydrocarbons.

Usetyenziso oluphambili:

1. Imathiriyeli ekrwada ye-spandex synthesis reaction:

I-Tetrahydrofuran ngokwayo ingaba yi-polycondensation (nge-cationic ring-opening repolymerization) kwi-polytetramethylene ether diol (PTMEG), eyaziwa ngokuba yi-tetrahydrofuran homopolyl.I-PTMEG kunye ne-toluene diisocyanate (TDI) eyenziwe ngokuxhatshazwa kokugqoka, ukumelana neoli, ukusebenza kweqondo lokushisa eliphantsi, amandla aphezulu erabha ekhethekileyo;I-Block polyether polyester i-elastic material yalungiswa nge-dimethyl terephthalate kunye ne-1, i-4-butanediol.I-PTMEG ene-molecular weight ye-2000 kunye ne-p-methylene bis (4-phenyl) diisocyanate (MDI) ukwenza i-polyurethane elastic fiber (i-SPANDEX fiber), i-rubber ekhethekileyo kunye neenjongo ezikhethekileyo zokugqoka izinto eziluhlaza.Olona setyenziso lubalulekileyo lweTHF kukuveliswa kwePTMEG.Ngokwezibalo ezirhabaxa, malunga ne-80% ye-THF yehlabathi jikelele isetyenziselwa ukuveliswa kwe-PTMEG, kwaye i-PTMEG isetyenziselwa ukuveliswa kwe-spandex fiber.

2. Ukunyibilika nokusebenza okugqwesileyo:

I-Tetrahydrofuran sisixhobo sokunyibilikisa esisetyenziswa ngokuqhelekileyo, silungele ukunyibilikisa i-PVC, i-polyvinylidene chloride kunye ne-butyl aniline, esetyenziswa ngokubanzi njengendawo yokugquma, i-anticorrosive coating, inki yokuprinta, iteyiphu kunye ne-solvent yokugquma ifilimu, kunye ne-Chemicalbook kwi-electroplating aluminiyam engamanzi inokulawulwa ngokungenamthetho kwe-aluminium. umaleko ubukhulu kunye eqaqambileyo.I-solvent ye-tape yokugqoka, i-PVC yokugqoka i-PVC, ukucoca i-PVC i-reactor, ukususa ifilimu ye-PVC, i-cellophane yokugqoka, i-inki yokushicilela iplastiki, i-thermoplastic polyurethane yokugqoka, i-adhesive, esetyenziswa ngokuqhelekileyo kwiingubo zomphezulu, iingubo zokukhusela, i-inki, i-extractants kunye ne-arhente yonyango yomphezulu wesikhumba sokwenziwa.

3. Isetyenziswa njengemathiriyeli ekrwada kwi-organic synthesis efana namayeza:

Ukuveliswa kwe-tetrahydrothiophene, i-1.4-dichloroethane, i-2.3-dichlorotetrahydrofuran, i-valerolactone, i-butyl lactone kunye ne-pyrrolidone.Kumashishini amayeza, isetyenziselwa ukuhlanganiswa kwe-coughbixin, i-rifumycin, i-progesterone kunye namanye amachiza ehomoni.I-Tetrahydrothiophenol iveliswa ngonyango lwe-hydrogen sulfide, enokusetyenziswa njenge-odor agent kwi-fuel gas (i-identification additive), kwaye ikwayi-solvent ephambili kwishishini lamachiza.

4. Olunye Usetyenziso:

I-solvent ye-Chromatographic (i-gel permeation chromatography), esetyenziselwa i-flavour yegesi yendalo, i-acetylene extraction solvent, i-polymer material light stabilizer, njl. Ngokusetyenziswa okubanzi kwe-tetrahydrofuran, ngokukodwa kwiminyaka yamuva, ukukhula ngokukhawuleza kweshishini le-polyurethane, imfuno ye-PTMEG yethu. ilizwe liyanda, kwaye imfuno ye-tetrahydrofuran ikwabonisa ukukhula okukhawulezayo.

Ingozi:I-Tetrahydrofuran yeyeklasi ye-3.1 yolwelo olunokutsha kunye ne-flash point ephantsi, enokutsha ngokugqithisileyo, umphunga unokwenza umxube oqhumayo kunye nomoya, umda wokudubula yi-1.5% ~ 12% (iqhezu lomthamo), ngokucaphuka.Ubume bayo obunokutsha kakhulu bukwayingozi yokhuseleko.Eyona nto ixhalabisayo yokhuseleko nge-THFS kukwenziwa kancinci kweeperoxide zeorganic eziqhuma kakhulu xa zisemoyeni.Ukunciphisa lo mngcipheko, i-THFS efumanekayo yorhwebo idla ngokuncediswa nge-2, 6-di-tert-butylp-cresol (BHT) ukuthintela ukuveliswa kweeperoxides eziphilayo.Kwangaxeshanye, iTHF akufuneki yomiswe kuba iiperoxides zeorganic ziya kugxilwa kwintsalela yedistillation.

Imiqathango yokusebenza:ukusebenza okuvaliweyo, umoya ogcweleyo.Abanini-zithuthi kufuneka baqeqeshwe ngokukodwa kwaye bathobele ngokungqongqo iinkqubo zokusebenza.Kwenziwa isincomo sokuba abaqhubi banxibe isigqubuthelo segesi semaski (isiqingatha semaski), iiglasi ezikhuselayo, iimpahla ezichasene ne-static, kunye neeglavu ezixhathisa irabha kwi-oyile.Gcina kude nomlilo, umthombo wobushushu, ungatshayi kwindawo yokusebenza.Sebenzisa izixhobo zokungenisa umoya ezingagqabhukiyo kunye nezixhobo.Thintela umphunga ukuba ungaphumi kwindawo yokusebenzela.Kuphephe ukudibana nee-oxidants, iiasidi kunye neziseko.Umlinganiselo wokuhamba kufuneka ulawulwe ngexesha lokuzaliswa, kwaye kufuneka kubekho isixhobo sokumisa ukuthintela ukuqokelela kwe-electrostatic.Xa uphatha, ukulayishwa okulula kunye nokuthululwa kufuneka kwenziwe ukuthintela umonakalo wokupakisha kunye nezikhongozeli.Ixhotyiswe ngeentlobo ezihambelanayo kunye nobuninzi bezixhobo zomlilo kunye nokuvuza kwezixhobo zonyango olungxamisekileyo.Isikhongozeli esingenanto sinokuqulatha intsalela eyingozi.

Izilumkiso zokugcina:Ngokuqhelekileyo imveliso ine-inhibitor.Gcina kwindawo epholileyo nengena umoya.Zigcine kude nomlilo nobushushu.Ubushushu bendawo yokugcina impahla akufanele budlule kwi-30℃.Iphakheji kufuneka itywinwe kwaye ingadibanisi nomoya.Kufuneka igcinwe ngokwahlukileyo kwi-oxidizers, i-acids kunye neziseko, kwaye akufanele ixutywe.Izibane ezikhusela uqhushumbo kunye nezixhobo zokungenisa umoya ziyamkelwa.Musa ukusebenzisa izixhobo zoomatshini kunye nezixhobo ezithanda ukuba yintlantsi.Indawo yokugcina kufuneka ixhotyiswe ngezixhobo zonyango olungxamisekileyo oluvuzayo kunye nezixhobo ezifanelekileyo zokubamba.

Ukupakishwa: 180KG / igubu