I-Tetrahydrofuran

I-Tetrahydrofuran, okufingqiwe ngokuthi i-THF, iyinhlanganisela ephilayo ye-heterocyclic. Ingokwesigaba se-ether, ingumkhiqizo we-aromatic compound furan compound complete hydrogenation.

I-Tetrahydrofuran ingenye yama-ether anamandla kakhulu e-polar. Isetshenziswa njenge-solvent ephakathi nendawo ekuphenduleni kwamakhemikhali nasekukhipheni. Iwuketshezi oluguquguqukayo olungenambala ekushiseni kwegumbi futhi inephunga elifana ne-ether. Incibilika emanzini, i-ethanol, i-ether, i-acetone, i-Chemicalbook benzene nakwezinye izinyibilikisi eziningi eziphilayo, ezaziwa ngokuthi "i-solvent yendawo yonke". Emazingeni okushisa egumbi nasemanzini kungaxubana kancane, ibhizinisi elithile elingekho emthethweni le-reagent lisebenzisa leli phuzu ukwenza i-tetrahydrofuran reagent water profiteer. Ngenxa yokuthambekela kwe-THF kokwenza ama-peroxide agcinwe, i-antioxidant BHT ivame ukungezwa emikhiqizweni yezimboni. Okuqukethwe komswakama ≦0.2%. Inezici zobuthi obuphansi, iphuzu lokubila eliphansi kanye nokugeleza okuhle.

Izakhiwo zamakhemikhali:uketshezi olusobala olungenambala, olunephunga le-ether. Luxutshwe namanzi, utshwala, i-ketone, i-benzene, i-ester, i-ether, nama-hydrocarbon.

Izinhlelo zokusebenza eziyinhloko:

1. Izinto zokusetshenziswa zokusabela kokwenziwa kwe-spandex:

I-Tetrahydrofuran ngokwayo ingaba yi-polycondensation (ngokusebenzisa i-cationic ring-opening repopolymerization) ibe yi-polytetramethylene ether diol (PTMEG), eyaziwa nangokuthi i-tetrahydrofuran homopolyl. I-PTMEG kanye ne-toluene diisocyanate (TDI) zenziwe ngokumelana nokuguguleka, ukumelana nowoyela, ukusebenza okuphansi kwezinga lokushisa, amandla aphezulu erabha ekhethekile; Izinto ze-polyester elastic ze-block polyester zalungiswa nge-dimethyl terephthalate kanye ne-1, 4-butanediol. I-PTMEG enesisindo sama-molecule esingu-2000 kanye ne-p-methylene bis (4-phenyl) diisocyanate (MDI) ukwenza i-polyurethane elastic fiber (SSPANDEX fiber), irabha ekhethekile kanye nezinye izinto zokusetshenziswa ezikhethekile zokumboza. Ukusetshenziswa okubaluleke kakhulu kwe-THF ukukhiqizwa kwe-PTMEG. Ngokwezibalo ezilinganiselwe, cishe u-80% we-THF yomhlaba wonke usetshenziselwa ukukhiqizwa kwe-PTMEG, kanti i-PTMEG isetshenziswa kakhulu ekukhiqizweni kwe-spandex fiber.

2. Isinyibilikisi esisebenza kahle kakhulu:

I-Tetrahydrofuran iyi-solvent enhle kakhulu esetshenziswa kakhulu, efanelekile kakhulu ekuncibilikiseni i-PVC, i-polyvinylidene chloride kanye ne-butyl aniline, esetshenziswa kabanzi njenge-surface coating, i-anticorrosive coating, i-printing inkino, i-tape kanye ne-film coating solvent, kanti i-Chemicalbook ekufakeni i-electroplating i-aluminium liquid ingaba ukulawula ngokungakhethi ubukhulu besendlalelo se-aluminium kanye nokukhanya. I-solvent ye-tape coating, i-PVC surface coating, ukuhlanza i-PVC reactor, ukususa ifilimu ye-PVC, i-cellophane coating, i-plastic printing inkino, i-thermoplastic polyurethane coating, i-glue, evame ukusetshenziswa ekumbozweni kobuso, ezimbozweni ezivikelayo, i-inki, ama-extractants kanye nama-ejenti okwelapha ubuso besikhumba sokwenziwa.

3. Kusetshenziswa njengezinto zokusetshenziswa zokwenziwa kwezinto eziphilayo njengemithi:

Ekukhiqizweni kwe-tetrahydrothiophene, i-1.4-dichloroethane, i-2.3-dichlorotetrahydrofuran, i-valerolactone, i-butyl lactone kanye ne-pyrrolidone. Embonini yemithi, isetshenziswa ekwakhiweni kwe-coughbixin, i-rifumycin, i-progesterone kanye neminye imithi yama-hormone. I-Tetrahydrothiophenol ikhiqizwa ngokwelashwa kwe-hydrogen sulfide, engasetshenziswa njenge-agent yephunga kugesi kaphethiloli (isengezo sokuhlonza), futhi iyisisombululo esiyinhloko embonini yemithi.

4. Ezinye Izindlela Zokusebenzisa:

I-chromatographic solvent (i-gel permeation chromatography), esetshenziselwa ukunambitheka kwegesi yemvelo, i-acetylene extraction solvent, i-polymer material light stabilizer, njll. Ngokusetshenziswa kabanzi kwe-tetrahydrofuran, ikakhulukazi eminyakeni yamuva nje, ukukhula okusheshayo kwemboni ye-polyurethane, isidingo se-PTMEG ezweni lethu siyakhula, futhi isidingo se-tetrahydrofuran sibonisa nomkhuba wokukhula okusheshayo.

Ingozi:I-Tetrahydrofuran ingeye-liquid evuthayo yekilasi 3.1 ene-flash point ephansi, evuthayo kakhulu, umhwamuko ungakha ingxube eqhumayo nomoya, umkhawulo wokuqhuma ungu-1.5% ~ 12% (ingxenye yevolumu), kanye nokucasuka. Isimo sayo esivuthayo kakhulu siyingozi futhi. Ukukhathazeka okukhulu ngokuphepha nge-THFS ukwakheka kancane kwama-peroxide e-organic aqhumayo kakhulu lapho evezwa emoyeni. Ukuze kuncishiswe le ngozi, ama-THFS atholakala kwezentengiselwano avame ukuhambisana ne-2, 6-di-tert-butylp-cresol (BHT) ukuvimbela ukukhiqizwa kwama-peroxide e-organic. Ngesikhathi esifanayo, i-THF akufanele yomiswe ngoba ama-peroxide e-organic azogxila ensaleleni ye-distillation.

Izinyathelo zokuphepha zokusebenza:Ukusebenza okuvaliwe, ukuphefumula okugcwele. Abaqhubi kumele baqeqeshwe ngokukhethekile futhi balandele ngokuqinile izinqubo zokusebenza. Kunconywa ukuthi abaqhubi bagqoke imaski yegesi efana nesihlungi (imaski eyingxenye), izibuko zokuvikela zokuphepha, izingubo ezilwa nokungaguquguquki, namagilavu ​​​​enjoloba angangeni mafutha. Gcina kude nomlilo, umthombo wokushisa, kungabikho ukubhema endaweni yokusebenza. Sebenzisa izinhlelo zokungenisa umoya ezingaqhumi kanye nemishini. Vimbela umusi ukuthi ungaphumi uye emoyeni wendawo yokusebenza. Gwema ukuthintana nama-oxidants, ama-acid kanye nezisekelo. Izinga lokugeleza kufanele lilawulwe ngesikhathi sokugcwalisa, futhi kufanele kube nedivayisi yokumisa ukuvimbela ukunqwabelana kwe-electrostatic. Lapho kuphathwa, ukulayisha okulula kanye nokukhipha kufanele kwenziwe ukuvimbela umonakalo emaphaketheni nasezitsheni. Kuhlonyiswe ngezinhlobonhlobo ezifanele kanye nenani lemishini yomlilo kanye nemishini yokwelapha ephuthumayo evuzayo. Isitsha esingenalutho singase sibe nezinsalela eziyingozi.

Izinyathelo zokuphepha zokugcina:Ngokuvamile impahla inesivimbeli. Gcina endaweni yokugcina izinto epholile, enomoya opholile. Gcina kude nomlilo nokushisa. Izinga lokushisa lendawo yokugcina izinto akufanele lidlule ku-30°C. Iphakethe kufanele livalwe futhi lingathintani nomoya. Kufanele ligcinwe ngokwehlukana nama-oxidizer, ama-acid kanye nezisekelo, futhi akufanele lixutshwe. Kusetshenziswa izibani ezingaqhumi kanye nezindawo zokungenisa umoya. Ungasebenzisi imishini namathuluzi emishini avame ukuba nenhlansi. Indawo yokugcina izinto kufanele ifakwe imishini yokwelapha ephuthumayo evuzayo kanye nezinto zokubamba ezifanele.

Ukupakisha: 180KG/isigubhu