Dimethyl Carbonate (DMC): Ade titiriw a awuduru nnim, a ɛyɛ adwuma yiye a wɔde yɛ nnuru a ɛkɔ so daa
Physicochemical Su ne Molekyule Nhumu
Mfaso a Ɛwɔ Nhyehyɛe Mu
Awudisɛm a ɛba fam: Sɛ wɔde LD5 (anom, ɔkraman) yɛ 6400 mg/kg a, DMC yɛ nea ahobammɔ wom kɛse sen nnuru a wɔde yɛ methylation a wɔde di dwuma wɔ amanne kwan so (sɛ nhwɛso no, dimethyl sulfate, LD5 = 140 mg/kg), a ɛne EU REACH mmara a ɛfa efĩ a enni hɔ daa ho no hyia.
Nneɛma a wɔde yɛ ade:
Methylation: Methoxy kuw (−OCH3 ) no ma wotumi de methyl kuw no kɔ baabi foforo a ahobammɔ wom, na ɛsesa awuduru a wɔde si ananmu.
Carbonylation: Carbonyl kuw (−CO−) no ma ester sesa ne aminolysis yɛ mmerɛw, na ɛboa polycarbonate ahorow a phosgene nnim a wɔyɛ no.
Solvency: Esiane sɛ dielectric constant yɛ 3.1 nti, DMC ne alcohols, ketones, ne esters fra yiye, bere a ne fã bi ntumi nwura nsu mu (1.6 g/100 mL wɔ 20°C).
Honam fam Nsɛm Titiriw
DMC no bow a ɛyɛ 90.5°C ma ɛfata ma ɔhyew a ɛwɔ mfinimfini ne solvent a wɔsan nya, a ɛhwehwɛ ahoɔden a ɛba fam 30% sen benzene-based processes. Ne viscosity a ɛba fam (0.664 mPa・s) ma flowability yɛ kɛse wɔ applications te sɛ lithium battery electrolytes, bere a vaporization enthalpy 363 kJ / kg hwɛ hu sɛ drying rates a ɛfata ma coatings ne adhesives. Hyɛ no nsow: Ne tumi a ɛpae (3.1–20.5% vol) no hwehwɛ sɛ wɔde 防爆 (a ɛpae) mframa nhyehyɛe ahorow di dwuma.
Mfiridwuma mu Nneɛma Ahorow a Wɔde Di Dwuma
Green Synthesis Nneɛma Foforo a Wɔde Yɛ Nneɛma
Polycarbonate (PC) a Wɔyɛ:
Phosgene-Free Process: DMC ne bisphenol A (BPA) yɛ adwuma denam transesterification so ma ɛyɛ diphenyl carbonate (DPC), a afei wɔyɛ no polymerized ma ɛbɛyɛ PC. Saa kwan yi ma atom ahoɔden kɔ soro kodu 92% (vs. 65% ma atetesɛm phosgene akwan) na eyi awuduru a efi mu ba no fi hɔ.
Product Performance: PC resins a efi mu ba no ma ≥90% hann transmittance, ɔhyew distortion temperature a ɛyɛ 135°C, ne 10% a ɛkorɔn impact ahoɔden sen phosgene-derived PC, a wɔde di dwuma wɔ electronics casings ne kar kanea anim kataso.
Nnuru & Nnuru a Wɔde Yɛ Nnuru:
Methylation Reactions: Ɛsi dimethyl sulfate ananmu wɔ koma ne ntini mu nnuru (sɛ nhwɛso no, nifedipine) ne nnuru a ekum adwenemhaw (sɛ nhwɛso no, sertraline) a wɔyɛ mu, na ɛma aba a wonya no tu mpɔn 15–20% a methanol yɛ ade biako pɛ a efi mu ba.
Carbonylation Dwumadie: Wɔde di dwuma wɔ carbaryl (nnuru a wɔde kum mmoawa) a wɔyɛ mu na wɔakwati HCl a ɛbɛsɛe, na ɛtew ɛka so 25%.
Ahoɔden Foforo & Nneɛma a Wɔde Yɛ Adwuma
Lithium Battery Nkwammoaa a Wɔde Yɛ Nneɛma:
Wɔde ethylene carbonate (EC) ne ethyl methyl carbonate (EMC) afra DMC mu no, ɛma electrolytes a ɛkari pɛ a ionic conductivity yɛ 1.2 mS/cm. Wei ma battery kyinhyia nkwa nna trɛw kɔ mpɛn 1,200 (tumi a ɛkora so ≥85%), a ɛne EU Battery Mmara (2023/0051) hyia ma awuduru a ɛba fam. Wɔagye atom dedaw wɔ Tesla 4680 battery production mu.
Nneɛma a Nkwammoaa a Ɛtumi Sɛe:
Wɔde propylene oxide afra mu ma ayɛ polypropylene carbonate (PPC), nneɛma a egyina DMC so no twetwe CO2 40% na ɛsɛe wɔ asram 6–12 mu, na ɛdi plastic nwura a ɛwɔ pon so nneɛma a wɔde di dwuma pɛnkoro ne kuayɛ sini mu no ho dwuma.
Nneɛma a Wɔde Kata So & Nneɛma a Wɔde Ntama Ho
Eco-Friendly Solvents: Ɛsesa toluene/xylene wɔ kar OEM paint mu, na ɛma VOC dodow ≤50 g/L (ɛba fam koraa sen GB 24409-2020 gyinapɛn). Wɔtew bere a wɔde bɛyow so ma ɛyɛ nnɔnhwerew 2, na film no denden du 2H.
Formaldehyde-Free Adhesives: Wɔde di dwuma wɔ furniture panel bonding mu, DMC-gyina polyurethane adhesives wɔ free formaldehyde ≤0.01 mg/m3 (E0 grade), boa IKEA ma formaldehyde emissions so 500+ tɔn afe biara.
Nneɛma a Atwa Yɛn Ho Ahyia Ho Mfaso & Mfiridwuma mu Nsɛnnennen
Nsɛntitiriw a Ɛma Nneɛma a Ɛkɔ So Daa
Atom Sikasɛm: Nneɛma a ɛba akyi te sɛ methanol yɛ nea wotumi san de di dwuma denam distillation so, na ɛtew COD adesoa a ɛwɔ nsu fĩ mu so 70% sɛ wɔde toto atetesɛm mu akwan horow ho a.
Carbon Capture: PC a ɛnyɛ phosgene a wɔyɛ no tew carbon footprint so 45%, bere a DMC tɔn biara a wɔyɛ no di CO2 tɔn 0.6 a efi anyinam ahoɔden adwumayɛbea flue gas mu, na ɛboa CCU (carbon capture and utilization).
Nneɛma Foforo Ho Ahye
Ɛka a Wɔtew so: Ɔkwan a wɔfa so yɛ CO2 tẽẽ (a wɔde methanol, CO2, ne Pd-based catalysts di dwuma) no tew nneɛma a wɔde yɛ adwuma no ho ka so 30%, na Sinopec adwumayɛbea a wɔde yɛ nhwehwɛmu no tumi yɛ kiloton-scale production.
Ultra-Purity Solutions: Membrane mpaapaemu-adsorption mfiridwuma nya ɛlɛtrɔnik-grade DMC a dade ions ≤1 ppb ne ahotew ≥99.999%, hyia SEMI C87 gyinapɛn ahorow ma semiconductor ahotew.
Ahobammɔ Nneɛma a Wɔde Kɔ: Microencapsulated DMC (a wɔde SiO2 nanoshells akata so) ma flash point no kɔ soro kodu 60°C, a TÜV Rheinland agye ho adanse sɛ ɛyɛ akwantu ahobammɔ.
Nsɛm a Wɔakyerɛkyerɛ mu
| Aguade no Edin | Propionic Acid a wɔde yɛ nneɛma | |||||||||
| Nnuru a Wɔde Yɛ Nnuru | C3H6O2 na ɛwɔ hɔ | |||||||||
| Molekyul Mu Mu duru | 74.08 g/mol na ɛyɛ adwuma | |||||||||
| Mmaeɛ | Nsu a ɛyɛ mmerɛw a enni kɔla | |||||||||
| Nsuo a Ɛyɛ Nwene | -20.8°C na ɛwɔ hɔ | |||||||||
| Boiling Point a Ɛwɔ Hɔ | 141.1°C na ɛwɔ hɔ | |||||||||
| Muduro | 0.993 g/cm3 na ɛyɛ kɛse | |||||||||
| CAS NO | 79 - 09 - 4. Nkyem | |||||||||
| HS Mmara no | 29155000 na ɛwɔ hɔ | |||||||||
| EINECS NO | 201 - 176 - 3. Nsɛm a wɔka kyerɛ | |||||||||
| Abisadeɛ | Wɔde gu plastic, pharma, aduan, nnuru a wɔde yɛ nnuru ne nnuhuam mu | |||||||||
Quality Control Krataa
| Aguade no Edin | Propionic Acid a wɔde yɛ nneɛma | ||||||
| ADEƐ | STANDARD NSƐM (%) . | SƆHWƐ BALUE (%) . | |||||
| Propionic Acid a ɛwɔ mu, w/%≥ | 99.5 | 99.9 | |||||
| Nsuo a ɛyɛ den (20/20°C) . | 0.993-0.997 na ɛwɔ hɔ | 0.996 na ɛwɔ hɔ | |||||
| Boiling Range/°C a Ɛwɔ Hɔ | 138.5-142.5 na ɛwɔ hɔ | 139.4-141.1 na ɛwɔ hɔ | |||||
| Nsuo a ɛyɛ hyew nkaeɛ,w/%≤ | 0.01 na ɛwɔ hɔ | 0.006 na ɛwɔ hɔ | |||||
| Nsuo,w/%≤ | 0.15 na ɛwɔ hɔ | 0.02 na ɛwɔ hɔ | |||||
| Aldehyde,w/%≤ na ɛwɔ hɔ | ≤0.05 na ɛwɔ hɔ | 0.04 na ɛwɔ hɔ | |||||
| oxidization a ɛnyɛ den,w/%≤ | ≤0.05 na ɛwɔ hɔ | 0.01 na ɛwɔ hɔ | |||||
| Pb mg/kg≤ na ɛwɔ hɔ | 2.0.0 | ≤2.0 na ɛwɔ hɔ | |||||
| Sɛ́ mg/kg≤ no | 3.0.0 | ≤3.0 na ɛwɔ hɔ | |||||
| Awie | Di GB 1886.210-2016 gyinapɛn ahorow so | ||||||
Dɛn Nti na Yɛpaw Yɛn DMC?
Ahoɔden Titiriw Anan
Ahotew ho Awerɛhyem:
Yɛn transesterification nhyehyɛe a ɛkɔ so ne mprɛnsa distillation de mfiridwuma-grade DMC (≥99.5%) ne ɛlɛtrɔnik-grade (≥99.99%), a methanol ≤100 ppm. Asɛm: Batere adetɔfo bi a ɔde yɛn DMC di dwuma no nyaa 98.7% kan charge-discharge efficiency (industry avg. 95%).
Customization Tumi:
Nnuru a wɔayɛ ama acid bo (≤0.001 mgKOH/g), nsu (≤50 ppm), ne peroxides (≤5 ppm). Sɛ nhwɛso no, yɛyɛɛ DMC a acid a ɛba fam koraa (0.0005 mgKOH/g) a yɛde bɛyɛ nnuru a ɛyɛ acid a ɛyɛ mmerɛw.
Sikasɛm a Wɔde Di Dwuma Kwansin Ho Nhwɛso:
Wɔsan de methanol a ɛfiri mu ba no yɛ syngas (CO+H2) de yɛ DMC, na ɛma nneɛma a wɔde yɛ adwuma no yɛ adwuma yie 95% na ɛtew CO2 a wɔtow gu no so tɔn 3 wɔ DMC tɔn biara mu. Wɔnam supercritical CO2 so tew nwura a wɔde ahyɛ mu no ho ma wɔsan de di dwuma 95%.
Wiase Nyinaa Mmara a Wodi So:
Ɛne GB/T 1628-2020, ASTM D7056, ne JIS K 1551. GHS nkyerɛwde ne MSDS a wɔayɛ no sɛnea wɔpɛ no di mpɔtam hɔ ahwehwɛde ahorow ho dwuma (sɛ nhwɛso no, India BIS, Brazil INMETRO), na ɛma wotumi de nnɔnhwerew 72 tumi ma amanneɛbɔ.
Akwampaefo a Wɔyɛ Nnuruyɛ a Ɛkɔ So Daa
Dimethyl Carbonate resakra nnwuma denam ne su ahorow a "ɛnyɛ awuduru, ɛyɛ adwuma yiye, na wotumi de di dwuma bio" so. Yɛhyɛ bɔ sɛ yɛbɛyɛ akwan foforo ne ano aduru a carbon nnim, de mmoa a efi awiei kosi awiei fi nneɛma a wɔde yɛ adwuma so kosi dwumadie so ma. Yɛn DMC a yɛbɛpaw no kyerɛ sɛ yɛne nneɛma a ɛbɛkɔ so atra hɔ daa bɛyɛ biako —baabi a biribiara a ɛtɔ gu fam no ma efĩ so tew, ahoɔden a wɔde di dwuma yiye, ne mfiridwuma mu nkɔso, na ɛka bom kyekye nnuru daakye a ɛyɛ ahabammono.