Dimethyl Carbonate (DMC): Ekintu ky’omutaano ekiine obutwa bukye, kandi ekiine omugasho gw’amaani omu kuhangaho eby’obuhangwa

Ebintu by‘omubiri n‘eby‘obuhangwa n‘okwetegyereza kwa molekyu

Ebirungi by'enkora
Obutwa bukye: LD50 (omu kanwa, enkyenzi) ya 6400 mg/kg, DMC neekira oburinzi bw‘amaani kukira eby‘okurya by‘obuhangwa ebirikukora nk‘eby‘okurya (nk‘eky‘okureeberaho, dimethyl sulfate, LD55 = 140 mg/kg), erikukuratira ebiragiro bya EU REACH aha bihingwa ebitarikugumaho.
Okugarukamu:
Methylation: Ekibiina kya methoxy (−OCH3 ) nikibaasisa okuhingisa ekibiina kya methyl ekiine oburinzi, kuhindura ebindi ebirimu obutwa.
Okuhindura kaboni: Ekibiina kya kaboni (−CO−) nikihwera omu kuhindura kwa ester n’okuhindura aminolysis, nikishagika okukora kwa polycarbonates okutarimu phosgene.
Okushohoza: N’omubaro gw’amashanyarazi ogutarikuhinduka ogwa 3.1, DMC neejwanzya gye n’eby’okunywa, ketones, na esters, obwo erikushohoza ekicweka omu maizi (1.6 g/100 mL ahari 20°C).

Ebikuru eby'omubiri
DMC neefuka 90.5°C neegihindura nungi omu kugarukamu kw’obutagatsi bwagati n’okugaruzaho ebirungo, erikwetenga amaani makye 30% kukira emiringo erikwegamira ahari benzene. Obutafaari bwayo obukye (0.664 mPa・s) nibutunguura okusheesheka omu mirimo nk’eby’amashanyarazi bya battery ya lithium, obwo enthalpy y’okusheeshasheesha eya 363 kJ/kg erikuhamya emihendo y’okwoma eri ahagati y’ebintu ebirikujwara n’ebikwato ebirikuhamya. Yetegyereze: Omubaro gwayo gw‘okuturika (3.1–20.5% vol) nigwetengyesa enkora z‘okutaho omuyaga 防爆 (ezitarikuturika).

Emikozeso y'amakorero etari emwe n'emwe

Ebihangirwe bya Green Synthesis
Okukora ebiriisa (PC):
Omuringo ogutarimu Phosgene: DMC neekwatagana na bisphenol A (BPA) kurabira omu kuhindura ebiriisa kubaasa kureetaho diphenyl carbonate (DPC), erikuheza ehinduka PC. Omuringo ogu nigutunguura obushoboorozi bwa atomu kuhika ahari 92% (vs. 65% ahabw’emihanda y’obuhangwa eya phosgene) kandi nigumaraho obutwa oburikuruga omu nkora.
Okukora kw’ebintu: Ebirugire omu PC resins nibireetaho ≥90% y’okurabira omu mushana, obutagatsi bw’okuhindura obutagatsi bwa 135°C, n’amaani g’okuteera 10% kukira PC erikuruga omu phosgene, erikukoresibwa omu bikwato by’ebyoma n’ebikingirizo by’amatara g’emotoka.
Emibazi n'eby'obuhingi n'oburiisa:
Ebirikubaho omu kuhindura ebiriisa: Nikigaruzaho dimethyl sulfate omu kuhanga emibazi y‘omutima (nk‘eky‘okureeberaho, nifedipine) n‘emibazi y‘okurwanisa okushoberwa (nk‘eky‘okureeberaho, sertraline), nikitunguura eby‘okurya n‘ebicweka 15–20% n‘ekirungo kya methanol nk‘ekintu kyonka ekirikurugamu.
Okukozesa Carbonylation: Nikikozesibwa omu kukora carbaryl (omubazi gw’okurwanisa obukooko) okwetantara okusheeshasheesha kwa HCl, okukyendeeza aha sente n’ebicweka 25 ahari igana.

Amashanyarazi n'ebintu bisya
Amashanyarazi ga battery ya Lithium:
DMC neejwanzya n’ekiriisa kya ethylene carbonate (EC) n’ekiriisa kya ethyl methyl carbonate (EMC), neereetaho ebiriisa by’amashanyarazi ebiine obushoboorozi bw’okutwara ioni kuhika ahari 1.2 mS/cm. Eki nikiyongyera aha myaka y‘okukoresa battery kuhika aha mirundi 1,200 (okuguma n‘obushoboorozi ≥85%), ekirikuhikiiriza ebiragiro bya EU ebya battery (2023/0051) ahabw‘obutwa bukye. Ekaba eherize kukozesebwa omu kukora battery za Tesla 4680.
Ebintu ebirabaasa kusheenyuka:
Ebikwatsirwe hamwe na propylene oxide kubaasa kukora polypropylene carbonate (PPC), ebintu ebirikwegamira ahari DMC nibinywa 40% CO2 kandi nibisheenya omu myezi 6–12, nibishoboorora aha kasasiro y’ebiveera omu bikoreso by’okukoresa omurundi gumwe n’omu firimu z’eby’obuhingi.

Ebirikusiiga n'ebirikuhamya
Ebirungo ebitarikushiisha eby’obuhangwa: Nikihindura toluene/xylene omu rangi z’emotoka eza OEM, nikihikiiriza ebiri omu VOC ≤50 g/L (ahansi munonga y’omutindo gwa GB 24409-2020). Obwire bw’okwozya nibukyendeera kuhika aha shaaha 2, obugumire bwa firimu nibuhika ahari 2H.
Ebikwato ebitarimu Formaldehyde: Ebirikukoresibwa omu kukwatira hamwe ebipande by’ebintu by’omu nju, ebikwato by’okuhamya ebiri omu polyurethane ebirikwegamira ahari DMC biine formaldehyde eya busha ≤0.01 mg/m3 (E0 grade), ekirikuhwera IKEA kukyendeeza aha nshaho ya formaldehyde na tani 500+ buri mwaka.

Ebirungi by'obuhangwa n'ebizibu by'eby'emikono

Ebikuru omu kugumizamu
Eby’entaasya ya Atomic: Ebintu ebirikuruga omu maizi nka methanol nibibaasa kugaruka kukoresibwa kurabira omu kusheeshasheesha, okukyendeeza aha mugugu gwa COD omu maizi g’ebishaka n’ebicweka 70 ahari igana waagyeragyeranisa n’emiringo y’obuhangwa.
Okukwata Kaboni: Okukora kwa PC okutari kwa phosgene nikusharaho ekigyere kya kaboni n’ebicweka 45%, obwo buri tani ya DMC erikukorwaho erikurya tani 0.6 za CO2 kuruga omu gaasi y’omuriro gw’amashanyarazi, erikushagika CCU (okukwata kaboni n’okugikozesa).

Enshonda z'okukora ebintu bisya
Okukyendeeza aha sente: Omuringo gw’okukora CO2 obutoosha (okukoresa methanol, CO2, na Pd-based catalysts) nigukyendeeza aha sente z’ebintu ebitari bimwe na bimwe n’ebicweka 30%, n’ekyombeko ky’okugyezesa ekya Sinopec nikihikiiriza okukora ebiri aha rurengo rwa kiloton.
Ultra-Purity Solutions: Tekinologiya y‘okwahukana-okushohoza ebiri omu nkora y‘ebyoma neehikiiriza DMC ey‘omutindo gw‘ebyoma n‘ebyoma ≤1 ppb n‘obushemeire ≥99.999%, erikuhikiiriza emitindo ya SEMI C87 ey‘okuboneza semiconductor.
Ebikwato ebiine oburinzi: DMC erimu oburinzi obukye (erimu SiO2 nanoshells) neetunguura omwanya gw’okumurikira kuhika ahari 60°C, erikuhamibwa TÜV Rheinland ahabw’obukuumi bw’okutwara ebintu.

Ebirikushobororwaho

Orupapura rw'okurinda omutindo

Ahabw’enki Nitutoorana DMC Yeitu?

Amaani ana agakuru
Okuhamya obushemeire:
Omuringo gwaitu gw’okugumizamu n’okuhindura ebiriisa n’okushohoza emirundi eshatu nigureeta DMC ey’omutindo gw’amakorero (≥99.5%) n’ey’omutindo gw’ebyoma (≥99.99%), erimu methanol ≤100 ppm. Enshonga: Omuguzi wa battery orikukoresa DMC yaitu akatunga 98.7% y‘okubanza kushashura-okushohoza (industry avg. 95%).
Obushoborozi bw'okukora nk'oku orikwenda:
Ebirungo ebitebeekanisiibwe ahabw‘omuhendo gwa asidi (≤0.001 mgKOH/g), obutagatsi (≤50 ppm), n‘ebiriisa (≤5 ppm). Nk‘eky‘okureeberaho, tukakora DMC erimu asidi nkye munonga (0.0005 mgKOH/g) ahabw‘okukora emibazi erikwehurira asidi.
Eky'okureeberaho ky'eby'entaasya:
Ebirugire omu methanol nibigaruka bihindurwa syngas (CO+H2) ahabw’okukora DMC, kuhikiiriza 95% y’ebintu ebirungi n’okukyendeeza aha CO2 erikuruga omu itaka na tani 3 ahari buri tani ya DMC. Ebipapura bya kasasiro nibibonezibwa kurabira omu supercritical CO2 ahabw‘okugaruka kukoresibwa 95%.
Okukuratira ebiragiro omunsi yoona:
Okukuratira ebiragiro bya GB/T 1628-2020, ASTM D7056, na JIS K 1551. Ebihandiiko bya GHS ebitebeekanisiibwe nk‘oku orikwenda na MSDS nibihikiiriza ebyetaago by‘omu kicweka (nk‘eky‘okureeberaho, India BIS, Brazil INMETRO), ekirikubaasisa okushohoza eby‘okurya omu shaaha 72.

Okutandikaho eby'obuhangwa ebitarikuhwaho

Dimethyl Carbonate neehindura amakorero kurabira omu mitwarize yaayo "etari y'obutwa, erikukora gye, kandi erikubaasa kugaruka kukoresibwa". Nitwehayo omu nkora z‘okukora ebintu bisya n‘okushoboorora enshonga ezitarimu kaboni nyingi, turikuha obushagiki kuruga aha muheru kuhika aha muheru kuruga aha bikoreso ebitari bimwe na bimwe kuhika aha kukozesa. Okutoorana DMC yaitu nikimanyisa okukoragana n’okugumizamu—ahu buri itonzyo ririkureetaho okukyendeeza aha kusheeshasheesha, okukoresa gye amaani, n’okutunguuka omu bya tekinologiya, hamwe kwombeka eby’omumaisho eby’eby’obuhangwa ebirimu ebishaka.