Dimethyl Carbonate (DMC): Metung a Low-Toxicity, High-Efficiency Core Material para keng Sustainable Chemistry
Physicochemical Properties ampo Molecular Insights
Structural Advantages
Mababang Toxicity: Atin yang LD₅₀ (oral, rat) a 6400 mg/kg, ing DMC mas ligtas ya kesa kareng tradisyunal a methylation agents (alimbawa, dimethyl sulfate, LD₅₀ = 140 mg/kg), tutuki ya keng EU REACH regulation kareng non-persistent organic pollutants.
Reactivity:
Methylation: Ing methoxy group (-OCH3) papalyarian na ing ligtas a pamaglipat ning methyl group, a papalit kareng toxic a alternatibung paralan.
Carbonylation: Ing carbonyl group (−CO−) sasaup ya keng ester exchange ampo aminolysis, susuporta keng phosgene-free synthesis da reng polycarbonates.
Solvency: Atin yang dielectric constant a 3.1, ing DMC makipaghalo yang masalese kareng alcohol, ketones, ampo esters, kabang partially soluble ya keng danum (1.6 g/100 mL keng 20°C).
Key Physical Data
Ing DMC's boiling point a 90.5°C gagawan neng masanting para kareng medium-temperature a reaksyun ampo solvent recovery, mangailangan yang 30% mas ditak a enerhiya kesa kareng prosesung makabasi keng benzene. Ing kayang mababang viscosity (0.664 mPa・s) papaslag ne ing flowability kareng aplikasyun antimo reng lithium battery electrolytes, kabang ing vaporization enthalpy a 363 kJ/kg sisiguraduan na ing katamtaman a drying rates para kareng coatings ampo adhesives. Tandanan: Ing kayang explosive range (3.1–20.5% vol) mangailangan yang 防爆 (explosion-proof) a sistema ning bentilasyon.
miyayaliwang industrial applications
Green Synthesis Innovations
Polycarbonate (PC) Production:
Phosgene-Free Process: Ing DMC makipag-react ya keng bisphenol A (BPA) kapamilatan ning transesterification para makagawa yang diphenyl carbonate (DPC), na kaybat mi-polymerize ya keng PC. Ing paralan ayni papaslag ne ing atom efficiency angga 92% (vs. 65% para kareng tradisyunal a ruta ning phosgene) ampo papalwal nala deng makalasun a byproducts.
Performance ning Produktu: Ing resulta ning PC resins mag offer yang ≥90% light transmittance, metung a heat distortion temperature a 135°C, ampo 10% mas matas a impact strength kesa keng phosgene-derived PC, a gagamitan da keng electronics casings ampo automotive headlamp covers.
Pharmaceuticals & Agrochemicals:
Methylation Reactions: Papalitan ne ing dimethyl sulfate keng pamaglalang kareng cardiovascular a panulu (alimbawa, nifedipine) ampo antidepressants (alimbawa, sertraline), a magpasanting keng ani 15-20% gamit ing methanol bilang bukud mung byproduct.
Carbonylation Applications: Gagamitan ya keng carbaryl (pesticide) a gagawan para aiwasan ing HCl corrosion, at mabawas ing gastus 25%.
Bayung Enerhiya & Materyales
Lithium Battery Electrolytes:
Ing DMC gawa yang balansing electrolytes a maki ionic conductivity anggang 1.2 mS/cm. Iti palawakan ne ing bie ning baterya angga king 1,200 a besis (capacity retention ≥85%), a makatupad king EU Battery Regulation (2023/0051) para king mababang toxicity. Megamit ne keng Tesla's 4680 a battery production.
Biodegradable Materials:
Copolymerized ya keng propylene oxide para maging polypropylene carbonate (PPC), deng materyales a makabasi keng DMC sisipsip lang 40% CO2 ampo masira la kilub ning 6-12 a bulan, at a-address ing plastic waste keng single-use tableware ampo agricultural films.
Coatings & Adhesives
Eco-Friendly Solvents: Papalitan ne ing toluene/xylene kareng automotive OEM paints, atin yang VOC content ≤50 g/L (mababa ya keng GB 24409-2020 standards). Ing oras ning pamamutut mabawas ya keng 2 oras, ing katigasan ning pelikula miraras yang 2H.
Formaldehyde-Free Adhesives: Gagamitan da keng furniture panel bonding, DMC-based polyurethane adhesives atin lang malayang formaldehyde ≤0.01 mg/m3 (E0 grade), sasaup keng IKEA para mabawas ing formaldehyde emissions 500+ tons balang banua.
Environmental Advantages & Technical Challenges
Sustainability Highlights
Atomic Economy: Deng byproducts kalupa ning methanol malyari lang i-recycle kapamilatan ning distillation, babawasan na ing COD load keng wastewater 70% kumpara kareng tradisyunal a prosesu.
Carbon Capture: Ing non-phosgene PC synthesis babawasan na ing carbon footprint king 45%, kabang ing balang tonelada ning DMC a gagawan na kukunan ne ing 0.6 toneladang CO2 ibat king power plant flue gas, a susuporta king CCU (carbon capture and utilization).
Innovation Frontiers
Pamagbawas keng Gastus: Ing CO2 direct synthesis method (gamit ing methanol, CO2, ampo Pd-based catalysts) babawasan na ing gastus keng raw material keng 30%, ampo ing pilot plant ning Sinopec makagawa yang kiloton-scale production.
Ultra-Purity Solutions: Ing membrane separation-adsorption technology makayabut yang electronic-grade DMC a maki metal ions ≤1 ppb ampo purity ≥99.999%, makatupad kareng SEMI C87 standards para keng pamaglinis kareng semiconductor.
Ligtas a Logistics: Microencapsulated DMC (coated in SiO2 nanoshells) tatas ne ing flash point angga 60°C, certified ning TÜV Rheinland para keng kaligtasan keng transport.
Detalyadu
| lagyu ning produktu | Propionic Acid | |||||||||
| Chemical Formula | C3H6O2 | |||||||||
| Timbang Molecular | 74.08 g/mol | |||||||||
| It sira | alang kule a transparent a likidu | |||||||||
| Melting Point | -20.8°C | |||||||||
| Boiling Point | 141.1°C | |||||||||
| Bayat | 0.993 g/cm3 | |||||||||
| CAS NO | 79 - 09 - 4 | |||||||||
| HS Code | 29155000 | |||||||||
| EINECS NO | 201 - 176 - 3 | |||||||||
| Aplikasyon | Magamit ya keng plastic, pharma, pamangan, solvent ampo pabanglu | |||||||||
Quality Control Sheet
| lagyu ning produktu | Propionic Acid | ||||||
| GAMIT | STANDARD VALUE(%) | TEST VALUE(%) | |||||
| Propionic Acid Content, w/%≥ | 99.5 | 99.9 | |||||
| Density(20/20°C) | 0.993-0.997 | 0.996 | |||||
| Boiling Range/°C | 138.5-142.5 | 139.4-141.1 | |||||
| Evaporation residue,w/%≤ | 0.01 | 0.006 | |||||
| Danum,w/%≤ | 0.15 | 0.02 | |||||
| Aldehyde,w/%≤ | ≤0.05 | 0.04 | |||||
| madaling oxidization, w/%≤ | ≤0.05 | 0.01 | |||||
| Pb mg/kg≤ | 2.0 | ≤2.0 | |||||
| antimong mg/kg≤ | 3.0 | ≤3.0 | |||||
| Katuntunan | Tuki kareng pamantayan ning GB 1886.210-2016 | ||||||
bakit pilinan ing kekatamung DMC?
Apat a Lakas
Purity Assurance:
Ing kekaming patuloy a prosesu ning transesterification a maki triple distillation magdalang industrial-grade DMC (≥99.5%) ampo electronic-grade (≥99.99%), a maki methanol ≤100 ppm. Case: Ing metung a customer ning baterya na gagamit keng kekaming DMC mika 98.7% yang mumunang charge-discharge efficiency (industry avg. 95%).
Kapasidad ning Pamagpasadya:
Tailor-made solutions para keng acid value (≤0.001 mgKOH/g), moisture (≤50 ppm), ampo peroxides (≤5 ppm). Alimbawa, ginawa kaming ultra-low acid DMC (0.0005 mgKOH/g) para keng acid-sensitive pharmaceutical synthesis.
Circular Economy Model:
Deng methanol byproducts mi-recycle la keng syngas (CO+H2) para keng DMC production, maka-achieve yang 95% material efficiency ampo makabawas keng CO2 emissions 3 tons balang tonelada ning DMC. Ing basura a makabalut malinis ya kapamilatan ning supercritical CO2 para 95% a gamitan pasibayu.
Global Compliance:
Tutuki ya keng GB/T 1628-2020, ASTM D7056, ampo JIS K 1551. Deng customized GHS labels ampo MSDS makatupad la kareng regional requirements (alimbawa, India BIS, Brazil INMETRO), a magpasya keng 72-oras a customs clearance.
Pioneering Sustainable Chemistry
Ing Dimethyl Carbonate magbayu ya kareng industriya kapamilatan ning kayang "e makalasun, masanting, at malyaring i-recycle" a katangian. Magcommit kami kareng makabayung prosesu ampo low-carbon a solusyun, mag offer keng end-to-end a suporta manibat kareng raw materials angga na kareng aplikasyun. Ing pamili keng kekaming DMC mangabaldugan yang pamakipagpartner keng sustainability—nung nukarin ing balang patak magdala yang pamagbawas keng polusyun, energy efficiency, ampo ing pamag-asensu ning teknolohiya, kayabe ing pamaglalang keng mas green chemical hinaharap.