Dimethyl carbonate yog cov organic compound nrog cov tshuaj formula C3H6O3.Nws yog cov khoom siv tshuaj lom neeg tsis tshua muaj tshuaj lom neeg, kev tiv thaiv ib puag ncig zoo thiab ntau yam kev siv.Nws yog ib qho tseem ceeb organic synthesis nruab nrab.Nws muaj cov yam ntxwv ntawm cov pa phem tsawg thiab kev thauj mus los yooj yim.Cov tsos ntawm dimethyl carbonate yog cov kua tsis muaj xim nrog cov ntxhiab tsw;molecular hnyav yog 90.078, insoluble nyob rau hauv dej, miscible nyob rau hauv feem ntau organic solvents, miscible nyob rau hauv acids thiab bases.
Kev siv cov dimethyl carbonate
(1) Hloov phosgene li carbonylating tus neeg sawv cev
DMC muaj qhov chaw zoo sib xws nucleophilic cov tshuaj tiv thaiv.Thaum cov pawg carbonyl ntawm DMC raug tawm tsam los ntawm nucleophile, acyl-oxygen daim ntawv cog lus tau tawg los ua carbonyl compound, thiab cov khoom los ntawm cov khoom yog methanol.Yog li ntawd, DMC tuaj yeem hloov phosgene ua ib qho kev nyab xeeb reagent los ua ke carbonic acid derivatives., Polycarbonate yuav yog thaj chaw uas xav tau ntau tshaj plaws rau DMC.
(2) Hloov dimethyl sulfate ua methylating tus neeg sawv cev
Thaum cov methyl carbon ntawm DMC raug tawm tsam los ntawm nucleophile, nws daim ntawv cog lus alkyl-oxygen tawg, thiab cov khoom methylated kuj tsim, thiab cov tshuaj tiv thaiv tawm los ntawm DMC yog siab dua li ntawm dimethyl sulfate, thiab cov txheej txheem yog yooj yim dua.Cov kev siv tseem ceeb muaj xws li hluavtaws organic intermediates, cov khoom siv tshuaj, tshuaj tua kab, thiab lwm yam.
(3) Tsawg toxicity hnyav
DMC muaj zoo solubility, nqaim melting thiab boiling point ranges, loj nto nro, tsis tshua muaj viscosity, tsis tshua muaj dielectric tas li, siab evaporation kub thiab ceev evaporation tus nqi, yog li nws yuav siv tau raws li ib tug tsawg-tshuaj lom hnyav rau coatings Industrial thiab tshuaj industries.DMC tsis yog tsuas yog muaj toxicity tsawg xwb, tab sis kuj muaj cov yam ntxwv ntawm lub siab flash point, tsis tshua muaj vapor siab thiab qis tawg txwv nyob rau hauv cov huab cua, yog li nws yog ib tug ntsuab hnyav uas ua ke kom huv si thiab kev nyab xeeb.
(4) Roj av additives
DMC muaj cov yam ntxwv ntawm cov pa oxygen siab (txog 53% oxygen cov ntsiab lus hauv cov molecule), cov nyhuv octane zoo heev, tsis muaj theem sib cais, tsis muaj tshuaj lom thiab biodegradability sai, thiab txo cov hydrocarbons, carbon monoxide thiab formaldehyde hauv tsheb tso. .Tsis tas li ntawd, nws tseem overcomes cov shortcomings ntawm cov roj av additives uas yog yooj yim soluble nyob rau hauv dej thiab pa phem qhov chaw hauv av.Yog li, DMC yuav dhau los ua ib qho ntawm cov khoom siv roj av uas muaj peev xwm tshaj plaws los hloov MTBE.
Kev khaws cia thiab kev thauj mus los ntawm Dimethyl Carbonate
Kev ceev faj cia:Nws yog flammable, thiab nws cov vapor sib tov nrog huab cua, uas tuaj yeem tsim cov khoom tawg.Cia nws nyob rau hauv ib qho chaw txias, qhuav, thiab zoo-ventilated uas tsis yog-combustible warehouse.Khaws kom deb ntawm qhov hluav taws kub thiab qhov chaw kub.Lub tsev qiv ntawv kub yuav tsum tsis pub tshaj 37 ℃.Khaws lub thawv kaw kom nruj.Nws yuav tsum tau muab cais los ntawm oxidants, txo cov neeg ua haujlwm, acids, thiab lwm yam, thiab yuav tsum tsis txhob sib xyaw.Siv cov khoom tawg-pov thawj teeb pom kev zoo thiab qhov cua qhov cua.Txwv tsis pub siv cov cuab yeej siv tshuab thiab cov cuab yeej uas ua rau muaj qhov ci ntsa iab.Qhov chaw cia khoom yuav tsum tau nruab nrog cov khoom siv kho mob thaum muaj xwm txheej ceev thiab cov ntaub ntawv tsim nyog, uas yuav tsum tau muab cia rau hauv qhov chaw txias, qhuav thiab zoo-ventilated uas tsis yog-combustible warehouse.
Kev ceev faj txog kev thauj mus los:Packing Marks Flammable Liquid Packaging Method Common ntoo thawv sab nraum ampoules;Ordinary ntoo lub thawv sab nraum lub taub hau iav fwj, lub raj mis uas muaj hlau, lub raj mis yas lossis hlau thoob (cov kaus poom) Kev ceev faj Kev thauj mus los Cov khoom siv tua hluav taws thiab cov khoom siv kho mob thaum muaj xwm ceev yuav tsum tau nruab nrog ntau yam thiab ntau npaum li cas.
Post lub sij hawm: Sep-07-2022