Dulmar guud:

Dimethyl carbonate, oo loo yaqaan DMC, waa dareere aan midab lahayn oo hufan oo leh ur xun heerkulka qolka. Cufnaanta qaraabada ah (d204) waa 1.0694, barta dhalaalku waa 4℃, barta karkaraya waa 90.3℃, barta iftiimintuna waa 21.7℃ (furitaanka) 16.7℃ (Afka xiran), tusmada refractive (nd2Chemicalbook0)1.3687, waa dab-shidmi kara, ma aha sun. Waxaa lagu qasi karaa ku dhawaad ​​​​dhammaan dareerayaasha dabiiciga ah sida alkoholka, ketones, iyo esters qayb kasta, waana mid yar ku milma biyaha. Waxaa loo isticmaali karaa sidii reagent methylating. Marka la barbardhigo reagents-ka kale ee methylating, sida methyl iodide iyo dimethyl sulfate, dimethyl carbonate waa sun yar oo aan baaba'ayn karin.

Sifooyinka Kiimikada

Dareere aan midab lahayn oo hufan oo leh ur daran. Kuma milmo biyaha, kuna milma dareere dabiici ah sida ethanol iyo ether.

isticmaal

1. Nooc cusub oo dareere ah oo sun yar ayaa beddeli kara toluene, xylene, ethyl acetate, butyl acetate, acetone ama methyl ethyl ketone iyo dareere kale oo ku jira warshadaha rinjiga iyo dhejiska. Waa badeeco kiimiko cagaaran oo deegaanka u fiican.

2. Waa walax methylating wanaagsan, walax carbonylating ah, walax hydroxymethylating ah iyo walax methoxylating ah. Waxaa si weyn loogu isticmaalaa beeraha antioxidants-ka cuntada, wakiilada ilaalinta dhirta iyo beeraha kale. Waa walax kiimiko ceeriin ah oo si weyn loo isticmaalo.

3. Beddel ku habboon kiimikooyinka aadka u sunta ah sida phosgene, dimethyl sulfate, Chemicalbook methyl chloroformate, iwm.

4. Isku qas polycarbonate, diphenyl carbonate, isocyanate, iwm.

5. Daawada, waxaa loo isticmaalaa in lagu sameeyo daawooyinka ka hortagga caabuqa, daawooyinka xanuunka yareeya iyo kuwa xanuunka yareeya, daawooyinka fitamiinada, iyo daawooyinka habdhiska neerfaha dhexe.

6. Marka laga hadlayo sunta cayayaanka, waxaa inta badan loo isticmaalaa in lagu soo saaro methyl isocyanate, ka dibna lagu soo saaro daawooyin gaar ah oo kaarbamate ah iyo sunta cayayaanka (anisole).

7. Waxyaabaha lagu daro shidaalka, elektrolytka batteriga lithium, iwm.

Habka wax soo saarka waxaa lagu helaa falgalka methyl chloroformate iyo methanol. methyl chloroformate-ka ceeriin ee loo isticmaalo falgalka waxaa lagu helaa falgalka methanol iyo phosgene. Inta lagu jiro diyaarinta, badeecadan phosgenation-ka waxaa sidoo kale lagu samayn karaa iyadoo lagu darayo methanol xad dhaaf ah iyo dib u soo celinta falgalka iyada oo aan la kala saarin si loo sameeyo dimethyl carbonate. Falgalka kor ku xusan waxaa loo yaqaan habka phosgene-ka dhaqameed ee ku jira Buugga Kimikada. Habka transesterification-ka wuxuu ku lug leeyahay falgalka transesterification-ka ee u dhexeeya ethylene carbonate ama propylene carbonate iyo methanol si loo soo saaro dimethyl carbonate. Habkani wuxuu leeyahay wax soo saar sare, qalab daxal yar, iyo xaalado falgal oo khafiif ah. Si kastaba ha ahaatee, isha walxaha ceeriin waxaa xaddidaya horumarinta warshadaha batroolka iyo heerka isticmaalka walxaha waa hooseeyaa.

Macluumaadka Xiriirka