Dimethyl carbonate CAS 616-38-6
Dimethyl carbonate, oo loo yaqaan DMC, waa dareere aan midab lahayn oo hufan oo leh ur xun heerkulka qolka. Cufnaantiisa qaraabada ah (d204) waa 1.0694, dhibicdeeda dhalaalku waa 4°C, dhibicdeeda karkaraya waa 90.3°C, dhibicdeeda iftiimaysa waa 21.7°C (furan) iyo 16.7°C (xiran), tusmada falcelinteeda (nd20) waa 1.3687, waana dab-shid iyo sun la'aan. Waxaa lagu qasi karaa ku dhawaad dhammaan dareerayaasha dabiiciga ah sida alkoholka, ketones, iyo esters qayb kasta waana ku milmi karaa biyo yar. Waxaa loo isticmaali karaa sidii wakiil methylating ah. Marka la barbardhigo wakiilada kale ee methylating, sida methyl iodide iyo dimethyl sulfate, dimethyl carbonate waa sun yar waana la burburin karaa.
| SHAYGA | BATARIDARAJADA | Darajada Warshadaha | |
| Muuqaalka | Dareere aan midab lahayn, hufan, ma jiraan wax wasakh farsamo oo muuqda | ||
| Mawduuca ≥ | 99.99% | 99.95% | 99.9% |
| Qoyaanka ≤ | 0.005% | 0.01% | 0.05% |
| Methanol-ka ≤ | 0.005% | 0.05% | 0.05% |
| Cufnaanta (20°C) g/ml | 1.071±0.005 | 1.071±0.005 | 1.071±0.005 |
| Midab≤ | 10 | 10 | 10 |
Dimethyl carbonate (DMC) waxay leedahay qaab-dhismeed molecular gaar ah (CH3O-CO-OCH3). Qaab-dhismeedkeeda molecular wuxuu ka kooban yahay carbonyl, methyl, methoxy iyo kooxaha carbonylmethoxy. Sidaa darteed, si weyn ayaa loogu isticmaali karaa falcelinta isku-darka dabiiciga ah sida carbonylation, methylation, methoxylation iyo carbonylmethylation. Waxay leedahay isticmaal aad u ballaaran. Inta badan waxaa loo isticmaalaa sidii reagent carbonylation iyo methylation, lagu daro gaaska, iyo walxo cayriin ah oo loogu talagalay isku-darka polycarbonate (PC). Wax soo saarka baaxadda leh ee DMC wuxuu la yimid habka isku-darka aan phosgene ahayn ee polycarbonate. Isticmaalkeedu waa sida soo socota:
1. Nooc cusub oo dareere ah oo sun yar ayaa beddeli kara dareereyaasha sida toluene, xylene, ethyl acetate, butyl acetate, acetone ama butanone warshadaha rinjiga iyo dhejiska. Waa badeeco kiimiko cagaaran oo deegaanka u fiican.
2. Waa wakiil methylating wanaagsan, wakiil kaarboonylating ah, wakiil hydroxymethylating ah iyo wakiil methoxylating ah. Waxaa si weyn loogu isticmaalaa beeraha antioxidants-ka cuntada, wakiilada ilaalinta dhirta, iwm. Waa walxo kiimiko ceeriin ah oo si weyn loo isticmaalo.
3. Beddel ku habboon daawooyinka aadka u sunta badan sida phosgene, dimethyl sulfate, iyo methyl chloroformate.
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 fiitamiinada, iyo daawooyinka habdhiska neerfaha dhexe.
6. Sunta cayayaanka, waxaa inta badan loo isticmaalaa in lagu soo saaro methyl isocyanate, ka dibna lagu soo saaro daawooyinka qaarkood ee carbamate iyo sunta cayayaanka (anisole).
7. Waxyaabaha lagu daro shidaalka, elektrolytyada baytariga lithium, iwm.
200kg/durbaan
Dimethyl carbonate CAS 616-38-6
Dimethyl carbonate CAS 616-38-6
