Dimethyl Carbonate (DMC): Ekintu ekikulu eky’obutwa obutono, ekikola obulungi ennyo mu kemiko ow’olubeerera

Enkola za Physicochemical n’okutegeera kwa Molekyulu

Ebirungi ebiri mu nsengeka
Obutwa obutono: Nga LD15 (mu kamwa, envunza) ya 6400 mg/kg, DMC esinga nnyo obukuumi okusinga ebirungo eby’ekinnansi ebikola methylation (okugeza, dimethyl sulfate, LD5 = 140 mg/kg), ng’egoberera amateeka ga EU REACH ku bucaafu bw’ebiramu obutawangaala.
Okuddamu okukola:
Methylation: Ekibinja kya methoxy (−OCH3 ) kisobozesa okutambuza ekibinja kya methyl mu ngeri ey’obukuumi, nga kidda mu kifo ky’ebikozesebwa ebirala eby’obutwa.
Carbonylation: Ekibinja kya carbonyl (−CO−) kyanguyiza okuwanyisiganya ester n’okusengejja aminolysis, nga kiwagira okusengejja kwa polycarbonate okutaliimu phosphgene.
Obuziba: Nga erina enkyukakyuka ya dielectric eya 3.1, DMC etabula bulungi n’omwenge, ketones, ne esters, ate nga esaanuuka ekitundu mu mazzi (1.6 g/100 mL ku 20°C).

Ebikulu Ebikwata ku Mubiri
Ekifo ky’okufumba kwa DMC ekya 90.5°C kigifuula esaanira okukola ensengekera za bbugumu erya wakati n’okuzzaawo ekizimbulukusa, nga kyetaagisa amasoboza matono ebitundu 30% okusinga enkola ezesigamiziddwa ku benzene. Viscosity yaayo entono (0.664 mPa・s) eyongera ku flowability mu applications nga lithium battery electrolytes, ate vaporization enthalpy ya 363 kJ/kg ekakasa emiwendo egy’ekigero egy’okukala ku coatings ne adhesives. Weetegereze: Obuwanvu bwayo obw’okubwatuka (3.1–20.5% vol) kyetaagisa enkola z’empewo eziyitibwa 防爆 (eziziyiza okubwatuka).

Enkola ez’enjawulo mu makolero

Ebiyiiya mu kusengejja ebimera ebirabika obulungi (Green Synthesis Innovations).
Okukola Polycarbonate (PC):
Enkola Etaliimu Phosgene: DMC ekolagana ne bisphenol A (BPA) ng’eyita mu transesterification okukola diphenyl carbonate (DPC), oluvannyuma n’efuulibwa polimeeri n’efuuka PC. Enkola eno etumbula obulungi bwa atomu okutuuka ku bitundu 92% (vs. 65% ku makubo ga phosphgene ag’ennono) era emalawo ebiva mu butwa.
Omulimu gw’ebintu: Ebivaamu PC resins biwa ≥90% ekitangaala okutambuza, ebbugumu okukyusakyusa ebbugumu lya 135°C, n’amaanyi 10% waggulu okukuba okusinga phosgene-derived PC, ekozesebwa mu electronics casings ne automotive headlamp covers.
Eddagala & Agrochemicals:
Enkola za Methylation: Edda mu kifo kya dimethyl sulfate mu kukola eddagala ly’emisuwa (okugeza, nifedipine) n’eddagala eriweweeza ku kweraliikirira (okugeza, sertraline), okulongoosa amakungula ebitundu 15–20% nga methanol y’ekivaamu kyokka.
Enkola ya Carbonylation: Ekozesebwa mu kukola carbaryl (eddagala ly’ebiwuka) okwewala okukulukuta kwa HCl, okukendeeza ku nsaasaanya ebitundu 25%.

Amaanyi Amapya & Ebikozesebwa
Ebirungo ebikola amasannyalaze mu bbaatule ya Lithium:
Nga etabuddwa ne ethylene carbonate (EC) ne ethyl methyl carbonate (EMC), DMC ekola obusannyalazo obukwatagana nga bulina obutambuzi bwa ayoni okutuuka ku 1.2 mS/cm. Kino kyongera ku bulamu bwa bbaatule okutuuka ku mirundi 1,200 (okukuuma obusobozi ≥85%), nga kituukana n’etteeka lya EU erya Battery Regulation (2023/0051) olw’obutwa obutono. Yatwalibwa dda mu kukola bbaatule za Tesla 4680.
Ebintu Ebivunda Ebiramu:
Ebintu ebikolebwa mu DMC ne bikwatagana ne propylene oxide okukola polypropylene carbonate (PPC), binywa 40% CO2 ne bivunda mu myezi 6–12, ne bikola ku kasasiro w’obuveera mu bikozesebwa ku mmeeza ne firimu z’ebyobulimi ezikozesebwa omulundi gumu.

Ebizigo & Ebisiiga
Eco-Friendly Solvents: Edda mu kifo kya toluene/xylene mu langi za OEM ez’emmotoka, okutuuka ku VOC content ≤50 g/L (wansi nnyo ku mutindo gwa GB 24409-2020). Obudde bw’okukala bukendeezebwa okutuuka ku ssaawa 2, ng’obukaluba bwa firimu butuuka ku 2H.
Formaldehyde-Free Adhesives: Ekozesebwa mu furniture panel bonding, DMC-based polyurethane adhesives zirina formaldehyde ow’obwereere ≤0.01 mg/m3 (E0 grade), okuyamba IKEA okukendeeza ku formaldehyde emissions ne 500+ ttani buli mwaka.

Ebirungi mu butonde & Okusoomoozebwa mu by'ekikugu

Ebikulu mu kuyimirizaawo
Ebyenfuna bya Atomu: Ebivaamu nga methanol bisobola okuddamu okukozesebwa nga biyita mu kusengejja, ekikendeeza ku buzito bwa COD mu mazzi amakyafu ebitundu 70% bw’ogeraageranya n’enkola ez’ennono.
Carbon Capture: Okusengejja PC ezitali za phosphgene kusala ku carbon footprint ebitundu 45%, ate buli ttani ya DMC ekolebwa enywa ttani 0.6 eza CO2 okuva mu ggaasi w’amasannyalaze, ekiwagira CCU (carbon capture and utilization).

Ensalo z’obuyiiya
Okukendeeza ku nsaasaanya: Enkola ya CO2 direct synthesis (nga tukozesa methanol, CO2, ne Pd-based catalysts) esala ku nsaasaanya y’ebintu ebisookerwako ebitundu 30%, ng’ekkolero lya Sinopec ery’okugezesa lituuka ku kukola ku kiloton.
Ultra-Purity Solutions: Tekinologiya wa membrane separation-adsorption atuuka ku DMC ey’omutindo gw’ebyuma nga erina ion z’ebyuma ≤1 ppb n’obulongoofu ≥99.999%, ng’atuukana n’omutindo gwa SEMI C87 ogw’okwoza semiconductor.
Safe Logistics: Microencapsulated DMC (esiigibwa mu SiO2 nanoshells) esitula ekifo ky’okumasamasa okutuuka ku 60°C, ekakasiddwa TÜV Rheinland olw’obukuumi bw’entambula.

Ebikwata ku nsonga eno

Olupapula lw’okulondoola omutindo

Lwaki Londa DMC Yaffe?

Amaanyi Ana Amakulu
Okukakasa Obulongoofu:
Enkola yaffe ey’okukyusa esterification egenda mu maaso n’okufumbisa emirundi esatu etuwa DMC ey’omutindo gw’amakolero (≥99.5%) n’ogw’ebyuma (≥99.99%), nga methanol ≤100 ppm. Omusango: Kasitoma wa bbaatule ng’akozesa DMC yaffe yatuuka ku 98.7% mu kusooka okucaajinga-okufulumya obulungi (industry avg. 95%).
Obusobozi bw'okulongoosa:
Ebisengejjero ebikoleddwa ku mutindo gwa asidi (≤0.001 mgKOH/g), obunnyogovu (≤50 ppm), ne perokisayidi (≤5 ppm). Okugeza, twakola DMC eya asidi omutono ennyo (0.0005 mgKOH/g) okusobola okukola eddagala erikwata asidi.
Enkola y’ebyenfuna ebyekulungirivu:
Ebiva mu methanol biddamu okukozesebwa ne bifuuka syngas (CO+H2) okukola DMC, ne bituuka ku bulung’amu bw’ebintu ebitundu 95% n’okukendeeza ku bucaafu bwa CO2 ttani 3 buli ttani ya DMC. Ebipapula bya kasasiro byozebwa nga biyita mu supercritical CO2 okusobola okuddamu okukozesebwa ebitundu 95%.
Okugoberera amateeka mu nsi yonna:
Egoberera GB/T 1628-2020, ASTM D7056, ne JIS K 1551. Ebiwandiiko bya GHS ebikoleddwa ku mutindo ne MSDS bituukana n’ebisaanyizo by’ekitundu (okugeza, India BIS, Brazil INMETRO), ekisobozesa okukkiriza emisolo okumala essaawa 72.

Okutandikawo Chemistry ey’Obuwangaazi

Dimethyl Carbonate eddaamu okubumba amakolero ng'eyita mu mpisa zaayo "ezitali za butwa, ezikola obulungi, era ezisobola okuddamu okukozesebwa". Twewaayo okukola enkola eziyiiya n’okugonjoola ebizibu ebitaliimu kaboni, nga tuwa obuyambi okuva ku nkomerero okutuuka ku nkomerero okuva ku bikozesebwa ebisookerwako okutuuka ku kukozesebwa. Okulonda DMC yaffe kitegeeza okukolagana n’okuyimirizaawo —nga buli ttonsi livuga okukendeeza obucaafu, okukozesa obulungi amaanyi, n’okutumbula tekinologiya, awamu ne tuzimba ebiseera eby’omu maaso eby’eddagala ebirabika obulungi.