Dimethyl carbonate ke motsoako oa manyolo o nang le foromo ea lik'hemik'hale C3H6O3.Ke lisebelisoa tse tala tsa lik'hemik'hale tse nang le chefo e tlaase, thepa e babatsehang ea tšireletso ea tikoloho le mefuta e mengata ea tšebeliso.Ke motsoako oa bohlokoa oa organic synthesis bohareng.E na le litšobotsi tsa tšilafalo e fokolang le lipalangoang tse bonolo.Ponahalo ea dimethyl carbonate ke mokelikeli o se nang 'mala o monko o monate;boima ba molek'hule ke 90.078, ha bo khonehe ka metsing, bo kopantsoeng ka har'a metsoako e mengata ea lintho tse phelang, bo fapaneng ka li-acids le metheo.
Tšebeliso ea dimethyl carbonate
(1) Kenya sebaka sa phosgene joalo ka moemeli oa carbonylating
DMC e na le setsi se ts'oanang sa nucleophilic reaction.Ha sehlopha sa carbonyl sa DMC se hlaseloa ke nucleophile, tlamo ea acyl-oksijene e robeha ho etsa motsoako oa carbonyl, 'me sehlahisoa ke methanol.Ka hona, DMC e ka nka sebaka sa phosgene e le reagent e bolokehileng ea ho kopanya lihlahisoa tsa carbonic acid., Polycarbonate e tla ba sebaka se nang le tlhokahalo e kholo ka ho fetisisa ea DMC.
(2) Fetola dimethyl sulfate e le methylating agent
Ha methyl carbon ea DMC e hlaseloa ke nucleophile, tlamo ea eona ea alkyl-oksijene e robehile, 'me sehlahisoa sa methylated se boetse se hlahisoa,' me lihlahisoa tsa DMC li phahame ho feta tsa dimethyl sulfate, 'me mokhoa ona o bonolo.Lisebelisoa tsa mantlha li kenyelletsa li-intermediate tsa maiketsetso tsa organic, lihlahisoa tsa meriana, lihlahisoa tsa chefo e bolaeang likokoanyana, jj.
(3) solvent e tlaase ea chefo
DMC e na le solubility e ntle haholo, moqotetsane oa ho qhibiliha le libaka tse belang, tsitsipano e kholo ea holim'a metsi, viscosity e tlase, mocheso o tlase oa dielectric, mocheso o phahameng oa mouoane le sekhahla sa mouoane o potlakileng, ka hona e ka sebelisoa e le mokelikeli o nang le chefo e tlase bakeng sa liphahlo tsa indasteri le liindasteri tsa meriana.DMC ha e na chefo feela, empa e boetse e na le litšobotsi tsa boemo bo phahameng ba flash, khatello e tlaase ea mouoane le moeli o fokolang oa ho phatloha moeeng, kahoo ke solvent e tala e kopanyang bohloeki le polokeho.
(4) Li-additives tsa peterole
DMC e na le thepa ea oksijene e ngata (ho fihla ho 53% ea oksijene ka har'a molek'hule), phello e ntle ea ho matlafatsa octane, ha ho na karohano ea mekhahlelo, chefo e tlase le biodegradability e potlakileng, 'me e fokotsa bongata ba hydrocarbon, carbon monoxide le formaldehyde ho tsoa koloing. .Ho feta moo, e boetse e hlola mefokolo ea li-additives tse tloaelehileng tsa peterole tse qhibilihang habonolo metsing le ho silafatsa mehloli ea metsi a ka tlas'a lefatše.Ka hona, DMC e tla fetoha e 'ngoe ea li-additives tsa peterole tse ka nkelang MTBE sebaka.
Polokelo le Lipalangoang tsa Dimethyl Carbonate
Litlhokomelo tsa Polokelo:E ea cha, 'me mouoane oa eona o kopana le moea, o ka etsang motsoako o phatlohang.E boloke sebakeng sa polokelo se pholileng, se omeletseng, se nang le moea o motle se sa cheng.Qoba hole le mehloli ea mollo le mocheso.Mocheso oa laebrari ha oa lokela ho feta 37 ℃.Boloka setshelo se koetsoe ka thata.E lokela ho bolokoa ka thoko ho li-oxidants, li-reduction agents, acid, joalo-joalo, 'me ha ea lokela ho tsoakoa.Sebelisa mabone a thibelang ho phatloha le lisebelisoa tsa moea.Thibela tšebeliso ea thepa ea mochini le lithulusi tse atisang ho ba le litlhase.Sebaka sa polokelo se lokela ho ba le lisebelisoa tsa phekolo ea tšohanyetso tse lutlang le lisebelisoa tse loketseng tsa ho boloka, tse lokelang ho bolokoa sebakeng sa polokelo se pholileng, se omeletseng le se nang le moea o motle o sa cheng.
Litlhokomelo tsa Lipalangoang:Lipontšo tsa ho Paka Mokhoa oa ho Paka ka Metsi a Chesang Lebokose le tloaelehileng la lehong ka ntle ho li-ampoules;Lebokose le tloaelehileng la lepolanka le ka ntle ho libotlolo tsa khalase tse sekoti, libotlolo tsa khalase tse kentsoeng ka tšepe, libotlolo tsa polasetiki kapa libarele tsa tšepe (likotikoti) Litlhokomelo tsa lipalangoang Likoloi tsa lipalangoang Thepa ea ho tima mollo le ho lutla ha lisebelisoa tsa kalafo ea tšohanyetso li lokela ho ba le mefuta e fapaneng le bongata.
Nako ea poso: Sep-07-2022