I-Dimethyl Carbonate yeNdawo yezoShishino Umfanekiso obonakalisiweyo

IDimethyl carbonate yeNdawo yoShishino

I-Dimethyl carbonate (i-DMC) yikhompawundi eguquguqukayo yezinto eziphilayo ebonelela ngeenzuzo ezininzi kumashishini ahlukeneyo. I-formula yekhemikhali ye-DMC yi-C3H6O3, eyikhemikhali ekrwada yezinto ezinobuthi obuphantsi, ukusebenza kakuhle kokusingqongileyo kunye nokusetyenziswa okubanzi. Njengophakathi obalulekileyo kwi-organic synthesis, i-molecular structure ye-DMC iqulethe amaqela asebenzayo afana ne-carbonyl, i-methyl kunye ne-methoxy, enika iipropati ezahlukeneyo ezisebenzayo. Iimpawu ezikhethekileyo ezifana nokhuseleko, ukulungeleka, ukungcoliseka okuncinci kunye nokukhululeka kokuthutha kwenza i-DMC ibe yinto ekhangayo kubakhiqizi abafuna izisombululo ezizinzileyo.

Thumela i-imeyile kuthi

Iinkcukacha zeMveliso

Iithegi zeMveliso

Isalathiso soBugcisa

Izinto	Iyunithi	Umgangatho	Isiphumo
Imbonakalo	-	Ulwelo olungenambala & elubala
Umxholo	%	Min99.5	99.91
IMethanol	%	Ubukhulu be-0.1	0.006
Ukufuma	%	Ubukhulu be-0.1	0.02
Ubumuncu (CH3COOH)	%	Ubukhulu 0.02	0.01
Ukuxinana @20ºC	g/cm³	1.066-1.076	1.071
Umbala, Pt-Co	APHA Umbala	Ubukhulu be-10	5

Ukusetyenziswa

Enye yeenzuzo eziphambili ze-DMC kukukwazi ukubuyisela i-phosgene njenge-agent ye-carbonylating, inikezela ngenye indlela ekhuselekileyo kunye neyokusingqongileyo. I-Phosgene ibeka umngcipheko omkhulu kwimpilo yabantu nakwi-ecosystem ngenxa yobutyhefu bayo. Ngokusebenzisa i-DMC endaweni ye-phosgene, abavelisi abanako nje ukuphucula imigangatho yokhuseleko, kodwa baphinde bafake isandla kwinkqubo yokuvelisa eluhlaza, ecocekileyo.

Ukongeza, i-DMC inokusebenza njengendawo ebalaseleyo ye-methylating agent dimethyl sulfate. I-Dimethyl sulfate yi-compound enetyhefu kakhulu eyenza ingozi enkulu kubasebenzi kunye nokusingqongileyo. Ukusebenzisa i-DMC njenge-agent ye-methylating kuphelisa le mingcipheko ngelixa ibonelela ngeziphumo ezifanayo. Oku kwenza ukuba i-DMC ilunge kumashishini avelisa amayeza, iikhemikhali ze-agrochemicals, kunye nezinye iikhemikhali ezibaluleke kakhulu kwi-methyl.

Ukongeza kwiinzuzo ezikhankanywe ngasentla, i-DMC iphinda iphumelele njenge-solvent ye-toxicity ephantsi, iyenze ibe yinto ekhangayo kwizicelo ezahlukeneyo. Ubuthi bayo obuphantsi buqinisekisa indawo yokusebenza ekhuselekileyo, ukunciphisa umngcipheko wokuvezwa kwabasebenzi kunye nabathengi kwizinto ezinobungozi. Ngaphaya koko, ukunyibilika okugqwesileyo kwe-DMC kunye nokuhambelana okubanzi kunye nezixhobo ezahlukeneyo kuyenza ibe sisithako esibalulekileyo kwimveliso eyongeziweyo yepetroli. Ukusebenzisa i-DMC njengesinyibilikisi sezongezo zepetroli kuphucula ukusebenza kakuhle kokutsha kwepetroli, okunciphisa ukukhutshwa kunye nokuphucula ukusebenza kwe-injini.

Ukuqukumbela, i-dimethyl carbonate (i-DMC) yindlela eguquguqukayo kunye nezinzileyo kwiikhompawundi zemveli. Ukhuseleko lwayo, ukukhululeka, ubuthi obuphantsi kunye nokuhambelana kwenza i-DMC ilungele uluhlu olubanzi lwezicelo. Ngokutshintsha i-phosgene kunye ne-dimethyl sulfate, i-DMC inikezela ngokukhuselekileyo, ukhetho oluluhlaza ngaphandle kokunciphisa ukusebenza. Ingaba isetyenziswe njenge-carbonylating agent, i-methylating agent, okanye i-solvent-toxicity ephantsi, i-DMC iyisisombululo esithembekileyo kumashishini ajonge ukunyusa iimveliso kunye neenkqubo ngelixa unciphisa impembelelo yokusingqongileyo.

Ngaphambili: I-Acetone Cyanohydrin Ye-Methyl Methacrylate / Polymethyl Methacrylate

Okulandelayo: I-1, 1, 2, 2-Tetrachloroethane yokusetyenziswa kwe-Solvent

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