Dimethyl carbonate bụ ihe dị mkpa organic ogige a na-ejikarị na ụlọ ọrụ kemịkalụ, ọgwụ, ngwá electronic na ubi ndị ọzọ. Isiokwu a ga-ewebata usoro mmepụta na usoro nkwadebe nke dimethyl carbonate.

1. Production usoro nke dimethyl carbonate

Usoro mmepụta nke dimethyl carbonate nwere ike kewaa ụzọ abụọ: usoro kemịkal na usoro anụ ahụ.

1) Usoro kemịkalụ

Usoro mmeghachi omume kemịkalụ nke dimethyl carbonate bụ: CH3OH+CO2 → CH3OCO2CH3

Methanol bụ akụrụngwa maka dimethyl carbonate, na carbonate gas bụ reactant. Usoro mmeghachi omume chọrọ ihe na-akpali akpali.

E nwere ihe dị iche iche na-akpali akpali, gụnyere sodium hydroxide, calcium oxide, ọla kọpa oxide, na carbonate. Carbonate ester nwere mmetụta catalytic kachasị mma, mana nhọrọ nke ihe na-eme ka ọ dị mkpa ka a tụlee ihe ndị dị ka ọnụ ahịa na gburugburu ebe obibi.

The mmepụta usoro nke dimethyl carbonate tumadi na-agụnye nzọụkwụ ndị dị otú ahụ dị ka methanol ọcha, oxygen oxidation, kpo oku mmeghachi omume, nkewa / distillation, wdg N'oge mmeghachi omume usoro, nlezianya akara nke parameters dị ka okpomọkụ, nrụgide, na mmeghachi omume oge a chọrọ iji melite mkpụrụ na ịdị ọcha.

2) Usoro anụ ahụ

Enwere ụzọ abụọ isi anụ ahụ maka imepụta dimethyl carbonate: usoro nnabata na usoro mkpakọ.

Usoro absorption na-eji methanol dị ka onye na-amịkọrọ ihe ma na-emeghachi omume na CO2 na obere okpomọkụ iji mepụta dimethyl carbonate. Enwere ike ịmegharị ihe ntinye ahụ, na carbon dioxide nke mmeghachi omume ahụ na-emepụta nwekwara ike ịmegharị ya, ma ọnụ ọgụgụ mmeghachi omume na-adị ngwa ngwa na ike oriri dị elu.

Iwu mkpakọ na-eji ihe anụ ahụ nke CO2 bata na methanol n'okpuru nrụgide dị elu, si otú a na-enweta nkwadebe nke dimethyl carbonate. Usoro a nwere mmeghachi omume ngwa ngwa, mana ọ chọrọ akụrụngwa mkpakọ dị elu ma dị oke ọnụ.

Ụzọ abụọ a dị n'elu nwere uru na ọghọm nke onwe ha, a pụkwara ịhọrọ ya dabere na mkpa ngwa na ihe akụ na ụba.

2. Nkwadebe usoro nke dimethyl carbonate

Enwere ụzọ dị iche iche maka ịkwadebe dimethyl carbonate, na ndị a bụ ụzọ abụọ a na-ejikarị eme ihe:

1) Methanol usoro

Nke a bụ usoro a na-ejikarị akwadebe dimethyl carbonate. Usoro ọrụ ndị a kapịrị ọnụ bụ ndị a:

(1) Tinye methanol na potassium carbonate / sodium carbonate, na okpomọkụ na mmeghachi omume okpomọkụ mgbe ị na-akpali;

(2) Jiri nwayọọ tinye CO2, nọgide na-akpali akpali, ma dị jụụ mgbe emechara mmeghachi omume ahụ;

(3) Jiri oghere nkewa kewaa ngwakọta wee nweta dimethyl carbonate.

Ekwesiri ighota na okpomọkụ, nrụgide, oge mmeghachi omume, yana ụdị na ọnụọgụ nke ihe na-eme ka ọ dị mkpa ka a na-achịkwa n'oge usoro mmeghachi omume iji meziwanye mkpụrụ na ịdị ọcha.

2) Oxygen oxidation usoro

Na mgbakwunye na usoro methanol, a na-ejikarị usoro oxygen oxidation maka nkwadebe nke dimethyl carbonate. Usoro a dị mfe iji rụọ ọrụ ma nwee ike nweta mmepụta na-aga n'ihu.

Usoro ọrụ ndị a kapịrị ọnụ bụ ndị a:

(1) Tinye methanol na catalyst, okpomọkụ na mmeghachi omume okpomọkụ mgbe ị na-akpali;

(2) Tinye oxygen gas na usoro mmeghachi omume ma nọgide na-akpali;

(3) Kewapụ, distill, ma sachaa ngwakọta mmeghachi omume iji nweta dimethyl carbonate.

Ekwesiri iburu n'uche na usoro oxygen oxidation na-achọ nchịkwa nchịkwa dị ka ọnụego ọkọnọ na mmeghachi omume okpomọkụ nke ikuku oxygen, yana oke nke mmeghachi omume mmeghachi omume, iji meziwanye mkpụrụ na ịdị ọcha.

Site na mmalite nke isiokwu a, anyị nwere ike ịmụta banyere usoro mmepụta na ụzọ nkwadebe nke dimethyl carbonate. Site na usoro ihe omimi na nkọwa zuru ezu nke usoro mmeghachi omume na usoro mmepụta, anyị enyela usoro ihe ọmụma zuru oke na nke ziri ezi. Enwere m olileanya na akụkọ a nwere ike kpalie ndị na-agụ akwụkwọ na-amụ na nyocha na ngalaba a.