Ukubuka konke:

I-Dimethyl carbonate, ebizwa ngokuthi i-DMC, iwuketshezi olungenambala, olubonakalayo olunephunga elimnandi ekushiseni kwegumbi. Ubuningi obuhlobene (d204) bungu-1.0694, iphuzu lokuncibilika lingu-4℃, iphuzu lokubila lingu-90.3℃, kanti iphuzu lokushelela lingu-21.7℃ (ukuvula) 16.7℃ (Umlomo ovaliwe), inkomba yokubuyisa (nd2Chemicalbook0)1.3687, iyasha, ayinabo ubuthi. Ingaxutshwa cishe nazo zonke izinyibilikisi eziphilayo ezifana nama-alcohols, ama-ketone, nama-ester nganoma iyiphi indlela, futhi incibilika kancane emanzini. Ingasetshenziswa njenge-methylating reagent. Uma kuqhathaniswa nezinye izisunguli ze-methylating, njenge-methyl iodide kanye ne-dimethyl sulfate, i-dimethyl carbonate ayinabo ubuthi futhi ayiboli.

Izakhiwo Zamakhemikhali

Uketshezi olungenambala nolubonakalayo olunephunga elibi. Aluncibiliki emanzini, luncibilika ezinyibilikisini eziphilayo ezifana ne-ethanol ne-ether.

sebenzisa

1. Uhlobo olusha lwesinyibilikisi esinobuthi obuphansi lungathatha indawo ye-toluene, i-xylene, i-ethyl acetate, i-butyl acetate, i-acetone noma i-methyl ethyl ketone kanye nezinye izinyibilikisi embonini yopende ne-adhesive. Luwumkhiqizo wamakhemikhali oluhlaza okwesibhakabhaka onobungani nemvelo.

2. I-ejenti enhle ye-methylating, i-ejenti ye-carbonylating, i-ejenti ye-hydroxymethylating kanye ne-ejenti ye-methoxylating. Isetshenziswa kabanzi emikhakheni yama-antioxidants okudla, ama-ejenti okuvikela izitshalo kanye neminye imikhakha. Iyinto eluhlaza yamakhemikhali esetshenziswa kabanzi.

3. Indawo engcono kakhulu yamakhemikhali anobuthi obukhulu njenge-phosgene, i-dimethyl sulfate, i-Chemicalbook methyl chloroformate, njll.

4. Hlanganisa i-polycarbonate, i-diphenyl carbonate, i-isocyanate, njll.

5. Kwezokwelapha, isetshenziselwa ukuhlanganisa imithi yokulwa nokutheleleka, imithi yokulwa nokuvuvukala kanye nemithi yokunciphisa ubuhlungu, imithi yamavithamini, kanye nemithi yesimiso sezinzwa esiyinhloko.

6. Ngokuphathelene nezibulala-zinambuzane, isetshenziswa kakhulu ukukhiqiza i-methyl isocyanate, bese ikhiqiza imithi ethile ye-carbamate kanye nezibulala-zinambuzane (i-anisole).

7. Izithasiselo zephethiloli, i-electrolyte yebhethri le-lithium, njll.

Indlela yokukhiqiza itholakala ngokusabela i-methyl chloroformate kanye ne-methanol. I-methyl chloroformate yezinto zokusetshenziswa ezisetshenziswa ekusabeleni itholakala ngokusabela kwe-methanol kanye ne-phosgene. Ngesikhathi sokulungiselela, lo mkhiqizo we-phosgenation ungakhiwa futhi ngokungeza i-methanol eyengeziwe bese uvuselela ukusabela ngaphandle kokuhlukaniswa ukuze kuhlanganiswe i-dimethyl carbonate. Ukusabela okungenhla kubizwa ngokuthi indlela yendabuko ye-phosgene ku-Chemicalbook. Indlela ye-transesterification ihilela ukusabela kwe-transesterification phakathi kwe-ethylene carbonate noma i-propylene carbonate kanye ne-methanol ukukhiqiza i-dimethyl carbonate. Le ndlela inesivuno esikhulu, imishini ebolile ephansi, kanye nezimo zokusabela ezithambile. Kodwa-ke, umthombo wezinto zokusetshenziswa unqunyelwe ukuthuthukiswa kwemboni ye-petrochemical kanye nesilinganiso sokusetshenziswa kwezinto siphansi.

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