I-Tetrahydrofuran

I-Tetrahydrofuran, ngesifinyezo i-THF, yi-heterocyclic organic compound. Ikwiklasi ye-ether, yimveliso ye-aromatic compound furan compound complete hydrogenation.

I-Tetrahydrofuran yenye yezona ether zinamandla kakhulu ze-polar. Isetyenziswa njenge-solvent ephakathi kwi-polar reactions kunye ne-extract. Lulwelo oluguquguqukayo olungenambala kubushushu begumbi kwaye lunevumba elifana ne-ether. Inyibilika emanzini, kwi-ethanol, kwi-ether, kwi-acetone, kwi-Chemicalbook benzene nakwezinye izinyibilikisi ze-organic, ezaziwa ngokuba yi-"universal solvent". Kubushushu begumbi namanzi zinokuxutywa kancinci, ishishini elithile elingekho mthethweni le-reagent lisebenzisa eli nqaku ukwenza i-tetrahydrofuran reagent water profiteer. Ngenxa yokuthambekela kwe-THF ekwenzeni iiperoxides kwindawo yokugcina, i-antioxidant BHT idla ngokufakwa kwiimveliso zoshishino. Umxholo womswakama ≦0.2%. Ineempawu zetyhefu ephantsi, iqondo lokubila eliphantsi kunye nokugeleza okuhle.

Iimpawu zekhemikhali:ulwelo olucacileyo olungenambala, olunevumba le-ether. Luxutywe namanzi, utywala, i-ketone, i-benzene, i-ester, i-ether, kunye nee-hydrocarbons.

Izicelo eziphambili:

1. Izinto ezikrwada zempendulo yokwenziwa kwe-spandex:

I-Tetrahydrofuran ngokwayo inokuba yi-polycondensation (nge-cationic ring-opening repolysis) ibe yi-polytetramethylene ether diol (PTMEG), eyaziwa ngokuba yi-tetrahydrofuran homopolyl. I-PTMEG kunye ne-toluene diisocyanate (TDI) zenziwe ngokuxhathisa ukuguguleka, ukumelana neoyile, ukusebenza okuphantsi kobushushu, amandla aphezulu ngerabha ekhethekileyo; Izinto ze-polyester elastic ze-block polyester zalungiswa nge-dimethyl terephthalate kunye ne-1, 4-butanediol. I-PTMEG enobunzima beemolekyuli obuhambelanayo be-2000 kunye ne-p-methylene bis (4-phenyl) diisocyanate (MDI) ukwenza i-polyurethane elastic fiber (SSPANDEX fiber), irabha ekhethekileyo kunye nezinye izinto ezisetyenziswayo zokugquma. Eyona ndlela ibalulekileyo yokusebenzisa i-THF kukuvelisa i-PTMEG. Ngokwezibalo ezirhabaxa, malunga ne-80% ye-THF yehlabathi isetyenziselwa ukuvelisa i-PTMEG, kwaye i-PTMEG isetyenziselwa kakhulu ukuvelisa i-spandex fiber.

2. Isinyibilikisi esisebenza kakuhle kakhulu:

I-Tetrahydrofuran sisinyibilikisi esisetyenziswa kakhulu, esifanelekileyo ngakumbi ekunyibilikiseni i-PVC, i-polyvinylidene chloride kunye ne-butyl aniline, esetyenziswa kakhulu njenge-surface coating, i-anticorrosive coating, i-printing ink, i-tape kunye ne-film coating solvent, kunye ne-Chemicalbook kwi-electroplating aluminium liquid inokuba lulawulo olungenamkhethe lobukhulu be-aluminium layer kunye nokukhanya. Isinyibilikisi se-tape coating, i-PVC surface coating, ukucoca i-PVC reactor, ukususa ifilimu ye-PVC, i-cellophane coating, i-plastic printing ink, i-thermoplastic polyurethane coating, i-adhesive, esetyenziswa kakhulu kwi-surface coating, i-protective coating, i-inki, i-extractants kunye ne-arhente zonyango lomphezulu wesikhumba esenziweyo.

3. Isetyenziswa njengezinto zokwenza imveliso yezinto eziphilayo ezifana namayeza:

Kwimveliso ye-tetrahydrothiophene, i-1.4-dichloroethane, i-2.3-dichlorotetrahydrofuran, i-valerolactone, i-butyl lactone kunye ne-pyrrolidone. Kwishishini lezemithi, isetyenziswa ekuhlanganiseni i-coughbixin, i-rifumycin, i-progesterone kunye namanye amayeza eehomoni. I-Tetrahydrothiophenol iveliswa ngonyango lwe-hydrogen sulfide, engasetyenziswa njenge-agent yevumba kwigesi yamafutha (isongezo sokuchonga), kwaye ikwayeyona nyibilikisi iphambili kwishishini lezemithi.

4. Ezinye iindlela zokusetyenziswa:

I-chromatographic solvent (i-gel permeation chromatography), esetyenziselwa incasa yegesi yendalo, i-acetylene extraction solvent, i-polymer material light stabilizer, njl. Ngokusetyenziswa ngokubanzi kwe-tetrahydrofuran, ingakumbi kwiminyaka yakutshanje, ukukhula ngokukhawuleza kweshishini le-polyurethane, imfuno ye-PTMEG kwilizwe lethu iyanda, kwaye imfuno ye-tetrahydrofuran ikwabonisa indlela yokukhula ngokukhawuleza.

Ingozi:I-Tetrahydrofuran ikwi-class 3.1 inflammable liquid ene-flash point ephantsi, etsha kakhulu, umphunga unokwenza umxube oqhumayo nomoya, umda wokuqhuma yi-1.5% ~ 12% (inxalenye yomthamo), kunye nokucaphuka. Uhlobo lwayo olutsha kakhulu nalo luyingozi yokhuseleko. Eyona ngxaki inkulu yokhuseleko nge-THFS kukwakheka kancinci kwee-organic peroxides eziqhumayo kakhulu xa zichatshazelwe emoyeni. Ukunciphisa lo mngcipheko, ii-THFS ezithengiswayo zihlala zongezwa nge-2, 6-di-tert-butylp-cresol (BHT) ukuthintela ukuveliswa kwee-organic peroxides. Kwangaxeshanye, i-THF akufuneki yomiswe kuba ii-organic peroxides ziya kugxilwa kwi-distillation residue.

Amanyathelo okhuseleko okusebenza:ukusebenza okuvaliweyo, umoya ophumayo ngokupheleleyo. Abaqhubi kufuneka baqeqeshwe ngokukodwa kwaye balandele ngokungqongqo iinkqubo zokusebenza. Kucetyiswa ukuba abaqhubi banxibe imaski yegesi efana nesihluzo (isiqingatha semaski), iiglasi zokukhusela ukhuseleko, iimpahla ezichasene nokungashukumi, kunye neeglavu zerabha ezingashukumiyo kwioyile. Gcina kude nomlilo, umthombo wobushushu, kungabikho kutshaya kwindawo yokusebenza. Sebenzisa iinkqubo zomoya ezithintela ukuqhuma kunye nezixhobo. Thintela umphunga ukuba ungaphumi uye emoyeni emsebenzini. Kuphephe ukudibana nee-oxidants, ii-asidi kunye neziseko. Isantya sokuhamba kufuneka silawulwe ngexesha lokuzaliswa, kwaye kufuneka kubekho isixhobo sokumisa umhlaba ukuthintela ukuqokelelana kwe-electrostatic. Xa uphatha, umthwalo ophantsi kunye nokukhulula kufuneka kwenziwe ukuthintela umonakalo kwiphakheji kunye neekhonteyina. Ixhotyiswe ngeentlobo ezahlukeneyo kunye nobuninzi bezixhobo zomlilo kunye nokuvuza kwezixhobo zonyango olungxamisekileyo. Isikhongozeli esingenanto sinokuba nentsalela eyingozi.

Amanyathelo okukhusela ukugcina:Ngokwesiqhelo imveliso inesithinteli. Gcina kwindawo yokugcina izinto epholileyo, enomoya opholileyo. Gcina kude nomlilo nobushushu. Ubushushu bendawo yokugcina izinto akufuneki budlule kwi-30℃. Iphakheji kufuneka ivalwe kwaye ingadibani nomoya. Kufuneka igcinwe ngokwahlukileyo kwi-oxidizers, ii-asidi kunye neziseko, kwaye akufuneki ixutywe. Izixhobo zokukhanyisa kunye nokungenisa umoya ezithintela ukuqhuma ziyasetyenziswa. Musa ukusebenzisa izixhobo zoomatshini kunye nezixhobo ezinokubangela i-spark. Indawo yokugcina izinto kufuneka ixhotyiswe ngezixhobo zonyango olungxamisekileyo oluvuzayo kunye nezinto ezifanelekileyo zokubamba.

Ukupakisha: 180KG/idrama