I-Dimethyl carbonate yi-organic compound kunye ne-chemical formula C3H6O3.Yimpahla ekrwada yeekhemikhali enetyhefu ephantsi, iipropathi ezigqwesileyo zokusingqongileyo kunye noluhlu olubanzi losetyenziso.Yinto ebalulekileyo ye-organic synthesis ephakathi.Ineempawu zongcoliseko oluncinci kunye nokuhamba lula.Imbonakalo ye-dimethyl carbonate lulwelo olungenambala kunye nevumba elimnandi;ubunzima be-molecular yi-90.078, i-insoluble emanzini, i-miscible kwiintlobo ezininzi ze-solvents eziphilayo, ezixutywe kwii-acids kunye neziseko.
Ukusetyenziswa kwe-dimethyl carbonate
(1)Faka endaweni ye-phosgene njenge-arhente ye-carbonylating
I-DMC ineziko elifanayo le-nucleophilic reaction.Xa iqela le-carbonyl le-DMC lihlaselwa yi-nucleophile, i-acyl-oxygen bond iyaphulwa ukuze yenze i-carbonyl compound, kwaye i-by-product yi-methanol.Ngoko ke, i-DMC ingathatha indawo ye-phosgene njenge-reagent ekhuselekileyo yokwenza i-carbonic acid derivatives., I-Polycarbonate iya kuba yindawo enemfuno enkulu ye-DMC.
(2)Faka endaweni ye-dimethyl sulfate njenge-agent ye-methylating
Xa i-methyl carbon ye-DMC ihlaselwa yi-nucleophile, ibhondi yayo ye-alkyl-oksijeni iphukile, kwaye imveliso ye-methylated nayo iveliswa, kwaye imveliso yokusabela ye-DMC iphezulu kune-dimethyl sulfate, kwaye inkqubo ilula.Ukusetyenziswa okuphambili kubandakanya i-synthetic organic intermediates, iimveliso zamayeza, iimveliso ze-pesticide, njl.
(3)isinyibilikisi esinetyhefu ephantsi
I-DMC inokunyibilika okugqwesileyo, ukunyibilika okumxinwa kunye noluhlu lwamanqaku abilayo, ukuxinezeleka okukhulu komphezulu, i-viscosity ephantsi, i-dielectric engaguqukiyo, ubushushu obuphezulu bomphunga kunye nesantya somphunga okhawulezayo, ngoko ke inokusetyenziswa njengesinyibilikisi esinetyhefu esezantsi yokwaleka kuShishino kunye namashishini axuba amayeza.I-DMC ayikho nje i-toxicity ephantsi, kodwa ineempawu ze-flash point, uxinzelelo oluphantsi lomphunga kunye nomda ophantsi wokuqhuma emoyeni, ngoko ke i-solvent eluhlaza edibanisa ukucoceka kunye nokhuseleko.
(4)Izongezo zepetroli
I-DMC ineempawu zomxholo weoksijini ephezulu (ukuya kuthi ga kwi-53% yomxholo weoksijini kwimolekyuli), isiphumo esihle kakhulu sokuphucula i-octane, akukho kwahlukana kwesigaba, ubuthi obuphantsi kunye nokubola kwe-biodegradability, kunye nokunciphisa inani le-hydrocarbons, i-carbon monoxide kunye ne-formaldehyde kwi-exhaust yemoto. .Ukongeza, iphinda yoyise iintsilelo zezongezo zepetroli eziqhelekileyo ezinyibilika ngokulula emanzini kwaye zingcolise imithombo yamanzi aphantsi komhlaba.Ke ngoko, i-DMC iya kuba sesinye sezona zongezo zepetroli ezinokuthi zithathe indawo yeMTBE.
Ukugcinwa kunye nokuThuthwa kweDimethyl Carbonate
ImiQathango yoGcino:Iyatsha, kwaye umphunga wayo uxutywa nomoya, onokuthi wenze umxube oqhumayo.Yigcine kwindawo epholileyo, eyomileyo, nengena umoya ococekileyo ongatshiyo.Zigcine kude nomlilo kunye nemithombo yobushushu.Ubushushu bethala leencwadi akufunekanga budlule kwi-37℃.Gcina isikhongozeli sivalwe ngokuqinileyo.Kufuneka igcinwe ngokwahlukileyo kwi-oxidants, i-agent yokunciphisa, i-acids, njl., kwaye akufanele ixutywe.Sebenzisa izibane ezingagqabhukiyo kunye nezixhobo zokungenisa umoya.Ukuthintela ukusetyenziswa kwezixhobo zoomatshini kunye nezixhobo ezithandwa ziintlantsi.Indawo yokugcina kufuneka ixhotyiswe ngokuvuza kwezixhobo zonyango olungxamisekileyo kunye nezixhobo ezifanelekileyo zokukhusela, ezimele zigcinwe kwindawo epholileyo, eyomileyo kunye neyomoya engenakho ukutsha.
ImiQathango yezoThutho:Amanqaku okuPakisha Indlela yokuPakisha okutshayo kolwelo Ibhokisi yomthi eqhelekileyo ngaphandle kwee-ampoules;Ibhokisi yeplanga eqhelekileyo ngaphandle kweebhotile zeglasi ezijijwayo, iibhotile zeglasi ezinecapped, iibhotile zeplastiki okanye imigqomo yentsimbi (iitoti) Amanyathelo okhuseleko Izithuthi zothutho Izixhobo zokucima umlilo kunye nokuvuza kwezixhobo zonyango olungxamisekileyo kufuneka zixhotyiswe ngeentlobo ezihambelanayo kunye nobuninzi.
Ixesha lokuposa: Sep-07-2022