I-Dimethyl carbonate iyinhlanganisela ye-organic enefomula yamakhemikhali i-C3H6O3.Kuyi-chemical material eluhlaza enobuthi obuphansi, izakhiwo ezinhle kakhulu zokuvikela imvelo kanye nokusetshenziswa okubanzi.Iyingxenye ebalulekile ye-organic synthesis.Inezici zokungcola okuncane kanye nokuhamba kalula.Ukubukeka kwe-dimethyl carbonate kuwuketshezi olungenambala olunephunga elimnandi;Isisindo semolekyuli singu-90.078, asincibiliki emanzini, asihlangani kuzincibilikisi eziningi eziphilayo, ama-asidi nezisekelo ezihlukahlukene.
Ukusetshenziswa kwe-dimethyl carbonate
(1)Faka esikhundleni se-phosgene njenge-ejenti ye-carbonylating
I-DMC inesikhungo esifanayo sokusabela kwe-nucleophilic.Lapho iqembu le-carbonyl le-DMC lihlaselwa yi-nucleophile, isibopho se-acyl-oxygen siyaphulwa ukuze sakhe inhlanganisela ye-carbonyl, futhi umkhiqizo owenziwe yi-methanol.Ngakho-ke, i-DMC ingangena esikhundleni se-phosgene njenge-reagent ephephile ukuze ihlanganise okuphuma kokuphuma kwe-carbonic acid., I-Polycarbonate izoba indawo enesidingo esikhulu kakhulu se-DMC.
(2) Faka esikhundleni se-dimethyl sulfate njenge-ejenti ye-methylating
Lapho i-methyl carbon ye-DMC ihlaselwa yi-nucleophile, isibopho sayo se-alkyl-oksijeni siyaphulwa, futhi umkhiqizo we-methylated nawo ukhiqizwa, futhi isivuno sokusabela se-DMC siphezulu kune-dimethyl sulfate, futhi inqubo ilula.Ukusetshenziswa okuyinhloko kufaka phakathi izinto zokwenziwa ze-organic, imikhiqizo yemithi, imikhiqizo yezibulala-zinambuzane, njll.
(3)isincibilikisi esinobuthi obuphansi
I-DMC inokunyibilika okuhle kakhulu, izigaba zamaphuzu ancibilikayo amancane kanye nalawo abilayo, ukungezwani okukhulu kwendawo, i-viscosity ephansi, i-dielectric engaguquki, izinga lokushisa eliphezulu lokuhwamuka kanye nezinga lokuhwamuka okusheshayo, ngakho-ke ingasetshenziswa njengesinyibilikisi esinobuthi obuphansi bokumboza izimboni zezimboni nezemithi.I-DMC ayigcini nje ngokuba nobuthi obuncane, kodwa futhi inezici ze-flash point, ingcindezi ephansi ye-vapor kanye nomkhawulo ophansi wokuqhuma emoyeni, ngakho-ke iyi-solvent eluhlaza ehlanganisa ukuhlanzeka nokuphepha.
(4)Izithako zikaphethiloli
I-DMC inezakhiwo zokuqukethwe komoyampilo ophezulu (kufika ku-53% okuqukethwe komoyampilo ku-molecule), umphumela omuhle kakhulu wokuthuthukisa i-octane, akukho ukuhlukaniswa kwesigaba, ubuthi obuphansi kanye nokubola kwemvelo ngokushesha, futhi yehlisa inani lama-hydrocarbon, i-carbon monoxide kanye ne-formaldehyde ekukhishweni kwemoto. .Ngaphezu kwalokho, iphinde inqobe ukushiyeka kwezithasiselo zikaphethiloli ezivamile ezincibilika kalula emanzini futhi zingcolise imithombo yamanzi angaphansi komhlaba.Ngakho-ke, i-DMC izoba esinye sezithasiselo zikaphethiloli ezingaba khona esikhundleni se-MTBE.
Ukugcinwa Nokuthuthwa kwe-Dimethyl Carbonate
Imithetho Yesitoreji:Iyakwazi ukuvutha, futhi umhwamuko wayo uhlangana nomoya, okungase kwakhe ingxube eqhumayo.Yigcine endaweni epholile, eyomile, futhi enomoya omuhle ongashi.Gcina kude nomlilo nemithombo yokushisa.Izinga lokushisa lomtapo wolwazi akufanele lidlule ku-37℃.Gcina isiqukathi sivalwe ngokuqinile.Kufanele igcinwe ngokuhlukana nama-oxidants, ama-ejenti anciphisayo, ama-asidi, njll., futhi akufanele ihlanganiswe.Sebenzisa izibani ezingaqhumi kanye nezindawo zokungenisa umoya.Vimbela ukusetshenziswa kwezinto eziwumshini namathuluzi ajwayele ukuba nezinhlansi.Indawo yokugcina impahla kufanele ifakwe izinto zokwelashwa eziphuthumayo ezivuzayo kanye nezinto ezifanele zokuvikela, okufanele zigcinwe endaweni yokugcina impahla epholile, eyomile futhi enomoya omuhle engashi.
Izinyathelo Zokuhamba:Ukupakisha Izimpawu Indlela Yokupakisha Uketshezi Oluvuthayo Ibhokisi elivamile lamapulangwe ngaphandle kwama-ampoule;Ibhokisi elivamile lamapulangwe ngaphandle kwamabhodlela engilazi ayizikulufu, amabhodlela engilazi anekepisi yensimbi, amabhodlela epulasitiki noma imiphongolo yensimbi (amathini) Izinyathelo zokuphepha zokuhamba Izimoto zokuthutha Imishini yokuqeda umlilo kanye nempahla yokwelapha izimo eziphuthumayo evuzayo kufanele ifakwe izinhlobo nenani elihambisanayo.
Isikhathi sokuthumela: Sep-07-2022