Dimethyl carbonate yog ib qho tseem ceeb organic compound siv dav hauv kev lag luam tshuaj, tshuaj, khoom siv hluav taws xob thiab lwm thaj chaw. Kab lus no yuav qhia cov txheej txheem ntau lawm thiab npaj txoj kev tshem tawm ntawm cov carbonate.

1, cov txheej txheem ntau lawm ntawm Dosethyl Carbonate

Cov txheej txheem ntau lawm ntawm Dosethyl carbonate tuaj yeem faib ua ob hom: tshuaj siv tshuaj thiab kev siv lub cev.

1) Txuj Ci Tshuaj

Cov tshuaj lom neeg synthesis cov tshuaj tiv thaiv ntawm detethyl carbonate yog: CH3OH + CE2 → CH3OCO2CH3

Methanol yog cov khoom siv raw rau kev txav mus rau ntawm cov pa roj carbonate, thiab cov pa roj carbonate yog cov reactant. Cov kev tiv thaiv txheej txheem yuav tsum muaj cov catalyst.

Muaj ntau hom catalysts, suav nrog sodium hydroxide, calcium oxide, tooj liab oxide, thiab carbonate. Carbonate Ester muaj cov txiaj ntsig catalytic zoo tshaj, tab sis xaiv ntawm catalalyst tseem yuav tsum xav txog cov yam ntxwv xws li tus nqi thiab ib puag ncig.

Cov txheej txheem ntau lawm ntawm Dosethyl carbonate feem ntau yog cov kauj ruam xws li cov kev tswj hwm, thiab lwm yam kev hloov pauv, thiab cov tshuaj tiv thaiv kev xav tau los txhim kho cov txiaj ntsig thiab purity.

2) lub cev kev

Muaj ob txoj kev lub cev tseem ceeb rau kev ua cov khoom siv tshem tawm Chetethyl Carbonate: Txoj kev ua haujlwm thiab cov txheej txheem compression.

Cov txheej txheem nqus tau siv methanol ua cov nqus dej thiab reacts nrog CO2 ntawm tsawg kub los tsim dimethyl carbonate. Qhov nqus tau tuaj yeem rov qab siv tau, thiab cov pa roj carbon dioxide tau tsim los ntawm cov tshuaj tiv thaiv kuj tseem tuaj yeem rov ua dua tshiab, tab sis cov tshuaj tiv thaiv qeeb thiab qeeb zog noj muaj zog.

Txoj Cai LuasTus siv cov khoom siv lub cev ntawm CO2 los mus ntsib Methanol nyob rau hauv kev tsim lub siab, yog li ua tiav kev npaj ntawm Dimethyl Carbonate. Hom no muaj tus nqi nrawm nrawm, tab sis yuav tsum muaj cov khoom siv hluav taws xob ntau thiab muaj nuj nqis.

Cov saum toj no ob txoj kev muaj lawv tus kheej thiab tsis zoo, thiab tuaj yeem raug xaiv los ntawm daim ntawv thov kev xav tau thiab cov nyiaj txiag.

2, npaj txoj kev ntawm Detethyl Carbonate

Muaj ntau txoj hauv kev npaj Dutethyl Carbonate, thiab cov hauv qab no yog ob txoj kev feem ntau:

1) Methanol Txuj Ci

Qhov no yog cov txheej txheem feem ntau siv rau kev npaj Detethyl Carbonate. Cov kauj ruam kev ua haujlwm tshwj xeeb yog raws li hauv qab no:

(1) ntxiv methanol thiab potassium carbonate / sodium carbonate, thiab cua sov kom cov tshuaj tiv thaiv kub thaum nplawm;

(2) Maj mam ntxiv CO2, txuas ntxiv nplawm, thiab txias cia tom qab cov tshuaj tiv thaiv tiav;

(3) Siv kev sib cais ua haujlwm rau kev sib xyaw ua ke sib xyaw thiab tau txais dimethyl carbonate.

Nws yuav tsum tau sau tseg tias qhov kub, lub siab, cov tshuaj tiv thaiv lub sijhawm, raws li cov hom thiab cov txheej txheem kev tiv thaiv zoo los txhim kho cov txiaj ntsig thiab kev coj dawb huv.

2) Cov pa oxygen oxidation txoj kev

Ntxiv nrog rau cov qauv methanol, cov pa oxygen oxidation txoj kev yog cov feem ntau siv rau kev npaj ntawm dimethyl carbonate. Txoj kev no yooj yim ua haujlwm thiab tuaj yeem ua tiav ntau lawm.

Cov kauj ruam kev ua haujlwm tshwj xeeb yog raws li hauv qab no:

(1) Ntxiv Methanol thiab catalyst, ua kom sov rau cov tshuaj tiv thaiv kub thaum nplawm;

(2) Ntxiv cov pa roj rau cov tshuaj tiv thaiv kab mob thiab txuas ntxiv kho;

(3) cais, distill, thiab purify cov tshuaj tiv thaiv sib xyaw kom tau dimethyl carbonate.

Nws yuav tsum tau sau tseg tias cov pa oxygen oxygen oxidation txheej xws li tus nqi ntsuas kub, nrog rau kev sib npaug ntawm cov tshuaj tiv thaiv, txhawm rau txhim kho cov txiaj ntsig thiab kev coj dawb huv.

Los ntawm kev qhia ntawm tsab xov xwm no, peb tuaj yeem kawm paub txog cov txheej txheem ntau lawm thiab kev npaj ntawm Dimethyl Carbonate. Los ntawm cov qauv molecular kom cov ncauj lus piav ntxaws ntxaws ntawm cov txheej txheem kev hloov pauv thiab txheej txheem ntau lawm, peb tau muab txoj kev paub thiab muaj tseeb. Kuv vam tias tsab xov xwm no tuaj yeem txhawb cov neeg nyeem kev kawm thiab kev tshawb fawb hauv daim teb no.