Isishwankathelo:

I-Dimethyl carbonate, ebizwa ngokuba yi-DMC, lulwelo olungenambala, olucacileyo olunevumba elibi kubushushu begumbi. Ubuninzi (d204) yi-1.0694, iqondo lokunyibilika yi-4℃, iqondo lokubila yi-90.3℃, kwaye iqondo lokukhanya yi-21.7℃ (ukuvula) 16.7℃ (Umlomo ovaliweyo), isalathisi sokurhawuzelela (nd2Chemicalbook0)1.3687, inokutsha, ayinatyhefu. Ingaxutywa phantse nazo zonke izinyibilikisi zendalo ezifana neealcohols, iiketones, kunye nee-esters nangayiphi na indlela, kwaye inyibilika kancinci emanzini. Ingasetyenziswa njenge-methylating reagent. Xa ithelekiswa nezinye ii-methylating reagents, ezifana ne-methyl iodide kunye ne-dimethyl sulfate, i-dimethyl carbonate ayinabungozi kwaye iyabola.

Iipropati zeKhemikhali

Ulwelo olungenambala nolucacileyo olunevumba elibi. Alunyibiliki emanzini, lunyibilika kwizinyibilikisi zendalo ezifana ne-ethanol kunye ne-ether.

sebenzisa

1. Uhlobo olutsha lwesinyibilikisi esingenatyhefu ingathabatha indawo ye-toluene, i-xylene, i-ethyl acetate, i-butyl acetate, i-acetone okanye i-methyl ethyl ketone kunye nezinye izinyibilikisi kwimizi-mveliso yepeyinti kunye ne-adhesive. Yimveliso yekhemikhali eluhlaza enobuhlobo nokusingqongileyo.

2. I-arhente elungileyo ye-methylating, i-arhente ye-carbonylating, i-arhente ye-hydroxymethylating kunye ne-arhente ye-methoxylating. Isetyenziswa kakhulu kwiindawo ze-antioxidants zokutya, ii-arhente zokukhusela izityalo kunye nezinye iindawo. Yinto esetyenziswa kakhulu kwi-chemical green material.

3. Indawo efanelekileyo yokuthatha indawo yeekhemikhali ezinobuthi obuphezulu ezifana ne-phosgene, i-dimethyl sulfate, i-Chemicalbook methyl chloroformate, njl.

4. Yenza i-polycarbonate, i-diphenyl carbonate, i-isocyanate, njl.njl.

5. Kwizonyango, isetyenziselwa ukwenziwa kwamayeza okulwa nosulelo, amayeza okulwa nokuvuvukala kunye namayeza okuthomalalisa iintlungu, amayeza eevithamini, kunye namayeza enkqubo yemithambo-luvo ephakathi.

6. Ngokuphathelele izibulali-zinambuzane, isetyenziswa kakhulu ukuvelisa i-methyl isocyanate, ize emva koko ivelise amayeza athile e-carbamate kunye nezibulali-zinambuzane (i-anisole).

7. Izongezo zepetroli, i-electrolyte yebhetri ye-lithium, njl.njl.

Indlela yokuvelisa ifunyanwa ngokusabela i-methyl chloroformate kunye ne-methanol. I-methyl chloroformate yezinto ezisetyenzisiweyo kwi-reaction ifunyanwa ngokusabela kwe-methanol kunye ne-phosgene. Ngexesha lokulungiselela, le mveliso ye-phosgenation inokwenziwa ngokongeza i-methanol engaphezulu kunye nokubuyisela i-reaction ngaphandle kokwahlukana ukuze kuhlanganiswe i-dimethyl carbonate. Le mpendulo ingentla ibizwa ngokuba yindlela yendabuko ye-phosgene kwiChemicalbook. Indlela ye-transesterification ibandakanya i-transesterification reaction phakathi kwe-ethylene carbonate okanye i-propylene carbonate kunye ne-methanol ukuvelisa i-dimethyl carbonate. Le ndlela inemveliso ephezulu, izixhobo ezibolayo eziphantsi, kunye neemeko zokuphendula ezithambileyo. Nangona kunjalo, umthombo wezinto eziluhlaza uthintelwe kuphuhliso lweshishini le-petrochemical kwaye izinga lokusetyenziswa kwezinto liphantsi.

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