Dimethyl carbonate ke motsoako oa bohlokoa oa manyolo o sebelisoang haholo indastering ea lik'hemik'hale, meriana, lisebelisoa tsa elektroniki le masimo a mang. Sehlooho sena se tla hlahisa mokhoa oa tlhahiso le mokhoa oa ho lokisetsa dimethyl carbonate.

1. Ts'ebetso ea tlhahiso ea dimethyl carbonate

Ts'ebetso ea tlhahiso ea dimethyl carbonate e ka aroloa ka mefuta e 'meli: mokhoa oa lik'hemik'hale le mokhoa oa' mele.

1) Mokhoa oa lik'hemik'hale

The chemical synthesis reaction equation of dimethyl carbonate ke: CH3OH+CO2 → CH3OCO2CH3

Methanol ke thepa e tala bakeng sa dimethyl carbonate, 'me khase ea carbonate ke eona e sebetsang. Ts'ebetso ea karabelo e hloka catalyst.

Ho na le li-catalyst tse fapaneng, ho kenyelletsa sodium hydroxide, calcium oxide, koporo oxide le carbonate. Carbonate ester e na le phello e ntle ka ho fetisisa ea catalytic, empa khetho ea catalyst e boetse e hloka ho nahana ka lintlha tse kang litšenyehelo le tikoloho.

Ts'ebetso ea tlhahiso ea dimethyl carbonate haholo-holo e kenyelletsa mehato e kang ho hloekisoa ha methanol, oxidation ea oksijene, karabelo ea ho futhumatsa, karohano / distillation, joalo-joalo Nakong ea ts'ebetso ea ho itšoara, ho laola ka thata li-parameter tse kang mocheso, khatello le nako ea ho itšoara ho hlokahala ho ntlafatsa chai le bohloeki.

2）Mokhoa oa ’mele

Ho na le mekhoa e 'meli ea mantlha ea 'mele ea ho hlahisa dimethyl carbonate: mokhoa oa ho monya le mokhoa oa ho hatella.

Mokhoa oa ho monya o sebelisa methanol joalo ka mohanyetsi mme o sebetsana le CO2 ka mocheso o tlase ho hlahisa dimethyl carbonate. Mokelikeli o ka sebelisoa hape, 'me carbon dioxide e hlahisoang ke karabelo e ka boela ea sebelisoa hape, empa lebelo la ho arabela le lieha le tšebeliso ea matla e phahame.

Molao oa khatello o sebelisa thepa ea 'mele ea CO2 ho kopana le methanol tlas'a khatello e phahameng, ka tsela eo ho finyella ho lokisoa ha dimethyl carbonate. Mokhoa ona o na le sekhahla sa karabelo e potlakileng, empa o hloka lisebelisoa tsa khatello ea matla a holimo mme o theko e boima.

Mekhoa e 'meli e ka holimo e na le melemo le melemo ea eona,' me e ka khethoa ho latela litlhoko tsa kopo le maemo a moruo.

2. Mokhoa oa ho itokisa oa dimethyl carbonate

Ho na le mekhoa e fapaneng ea ho lokisa dimethyl carbonate, 'me e latelang ke mekhoa e' meli e sebelisoang hangata:

1) Mokhoa oa Methanol

Ena ke mokhoa o sebelisoang haholo ho lokisa dimethyl carbonate. Mehato e khethehileng ea ts'ebetso ke e latelang:

(1) Eketsa methanol le potassium carbonate/sodium carbonate, le mocheso ho mocheso o arabelang ha o ntse o hlohlelletsa;

(2) Butle-butle eketsa CO2, tsoela pele ho susumetsa, 'me u pholile ka mor'a hore karabelo e phethoe;

(3) Sebelisa funnel ea karohano ho arola motsoako le ho fumana dimethyl carbonate.

Hoa lokela ho hlokomeloa hore mocheso, khatello, nako ea ho itšoara, hammoho le mofuta le boholo ba catalyst li hloka ho laoloa nakong ea ts'ebetso ea ho arabela ho ntlafatsa chai le bohloeki.

2) Mokhoa oa oksijene ea oksijene

Ntle le mokhoa oa methanol, mokhoa oa oksijene oxidation o boetse o sebelisoa hangata bakeng sa ho lokisa dimethyl carbonate. Mokhoa ona o bonolo ho sebetsa mme o ka finyella tlhahiso e tsoelang pele.

Mehato e khethehileng ea ts'ebetso ke e latelang:

(1) Eketsa methanol le catalyst, mocheso ho mocheso o arabelang ha o ntse o hlohlelletsa;

(2) Kenya khase ea oksijene tsamaisong ea karabelo 'me u tsoele pele ho sisinyeha;

(3) Arola, senya, 'me u hloekise motsoako oa karabelo ho fumana dimethyl carbonate.

Hoa lokela ho hlokomeloa hore mokhoa oa oksijene oxidation o hloka ho laola litekanyetso tse kang tekanyo ea phepelo le mocheso oa karabelo ea khase ea oksijene, hammoho le karolo ea likarolo tsa karabelo, ho ntlafatsa chai le bohloeki.

Ka kenyelletso ea sengoloa sena, re ka ithuta ka ts'ebetso ea tlhahiso le mekhoa ea ho lokisa ea dimethyl carbonate. Ho tloha ho sebopeho sa limolek'hule ho ea ho tlhaloso e qaqileng ea ts'ebetso ea karabelo le mokhoa oa tlhahiso, re fane ka mokhoa o pharaletseng le o nepahetseng oa tsebo. Ke tšepa hore sengoloa sena se ka khothatsa ho ithuta le lipatlisiso tsa babali lefapheng lena.