Dimethyl carbonate CAS 616-38-6
Dimethyl carbonate, yotchedwa DMC, ndi madzi opanda mtundu, owonekera bwino okhala ndi fungo lopweteka kutentha kwa chipinda. Kuchuluka kwake (d204) ndi 1.0694, malo ake osungunuka ndi 4°C, malo ake owira ndi 90.3°C, malo ake owunikira ndi 21.7°C (otseguka) ndi 16.7°C (otsekedwa), refractive index yake (nd20) ndi 1.3687, ndipo imatha kuyaka komanso siimayambitsa poizoni. Itha kusakanikirana ndi zinthu zonse zachilengedwe monga ma alcohols, ma ketones, ndi ma esters mwanjira iliyonse ndipo imasungunuka pang'ono m'madzi. Itha kugwiritsidwa ntchito ngati methylating agent. Poyerekeza ndi zinthu zina za methylating, monga methyl iodide ndi dimethyl sulfate, dimethyl carbonate ndi yopanda poizoni ndipo imatha kuwonongeka.
| CHINTHU | BATIRIGALADI | GALADI YA MAINDASIRI | |
| Maonekedwe | Madzi opanda utoto, owonekera bwino, opanda zonyansa zooneka ndi makina | ||
| Zamkati ≥ | 99.99% | 99.95% | 99.9% |
| Chinyezi ≤ | 0.005% | 0.01% | 0.05% |
| Methanol Yambiri≤ | 0.005% | 0.05% | 0.05% |
| Kuchulukana (20°C)g/ml | 1.071±0.005 | 1.071±0.005 | 1.071±0.005 |
| Mtundu ≤ | 10 | 10 | 10 |
Dimethyl carbonate (DMC) ili ndi kapangidwe kapadera ka mamolekyu (CH3O-CO-OCH3). Kapangidwe kake ka mamolekyu kali ndi magulu a carbonyl, methyl, methoxy ndi carbonylmethoxy. Chifukwa chake, ingagwiritsidwe ntchito kwambiri muzochita za organic synthesis monga carbonylation, methylation, methoxylation ndi carbonylmethylation. Ili ndi ntchito zambiri. Imagwiritsidwa ntchito makamaka ngati carbonylation ndi methylation reagent, chowonjezera cha mafuta, komanso zopangira polycarbonate (PC). Kupanga kwakukulu kwa DMC kwachitika limodzi ndi njira yopangira polycarbonate yopanda phosgene. Ntchito zake ndi izi:
1. Mtundu watsopano wa zosungunulira zopanda poizoni ungalowe m'malo mwa zosungunulira monga toluene, xylene, ethyl acetate, butyl acetate, acetone kapena butanone m'mafakitale opanga utoto ndi zomatira. Ndi mankhwala obiriwira obiriwira omwe ndi abwino kwa chilengedwe.
2. Mankhwala abwino ochepetsa methylation, othandizira kupanga carbonylating, othandizira kupanga hydroxymethylating ndi othandizira kupanga methoxylating. Amagwiritsidwa ntchito kwambiri m'magawo a ma antioxidants a chakudya, othandizira kuteteza zomera, ndi zina zotero. Ndi mankhwala opangidwa ndi mankhwala omwe amagwiritsidwa ntchito kwambiri.
3. Cholowa m'malo mwa mankhwala oopsa kwambiri monga phosgene, dimethyl sulfate, ndi methyl chloroformate.
4. Kupanga polycarbonate, diphenyl carbonate, isocyanate, ndi zina zotero.
5. Mu zamankhwala, imagwiritsidwa ntchito popanga mankhwala oletsa kutupa, mankhwala oletsa kutupa ndi ochepetsa ululu, mankhwala ophera mavitamini, ndi mankhwala a dongosolo la mitsempha.
6. Mu mankhwala ophera tizilombo, amagwiritsidwa ntchito makamaka popanga methyl isocyanate, kenako kupanga mankhwala enaake a carbamate ndi mankhwala ophera tizilombo (anisole).
7. Zowonjezera mafuta, ma electrolyte a lithiamu batire, ndi zina zotero.
200kg/ng'oma
Dimethyl carbonate CAS 616-38-6
Dimethyl carbonate CAS 616-38-6
