Dimethyl Carbonate (DMC): Nchintu chili abuti buniini, chibeleka obotu loko chakubelesya mukupanga misamu iizumanana
Zibeela zya Physicochemical a Molecular Insights
Bubotu bwabupange
Bulowa Busyoonto: A LD₅₀ (mulomo, mbeba) ya 6400 mg/kg, DMC ilikwabilidwe kwiinda misamu ya methylation (nkokuti, dimethyl sulfate, LD₅₀ = 140 mg/kg), kweendelana amilawu ya EU REACH aatala azintu zisofweede zitamani.
Kusanduka:
Methyl: Kabunga ka methoxy (-OCH3) kalakonzya kugwasya kuti kabunga ka methyl kachinche kabotu, akunjila mubusena bwazintu zitali kabotu.
Kuyungizya kaboni: Kabunga ka kaboni (−CO−) kagwasya kuchincha kwa ester a aminolysis, ikugwasyilizya kupanga ma polycarbonates kakunyina phosgene.
Kukonzya kunywika: A dielectric constant ya 3.1, DMC ilasangana kabotu ama alcohol, ketones, ama esters, mpawo kaili kunywika asyoonto mumaanzi (1.6 g/100 mL a 20°C).
Data iiyandika kapati
Busena bwakubila bwa DMC bwa 90.5°C bupa kuti ibeleke kabotu mukuchita zintu muchiindi chakupya aakati-akati akubweedezya zintu, nkaambo kakuyanda manguzu masyoonto a 30% kwiinda nzila zibelesya benzene. Kuyuma kwayo kusyoonto (0.664 mPa・s) kupa kuti kweenda kabotu muzintu zilimbuli lithium battery electrolytes, mpawo enthalpy ya 363 kJ/kg ilasinizya kuyuma kwaakati-akati kwama coatings aadhesives. chidziwiso: Busena bwayo bwakubboloka (3.1–20.5% vol) buyandika 防爆 (kukwabilila kupya) nzila zyakunjizya muya.
Zibelesyo zyamakkampani ziindene-indene
Kupanga zintu zipya zya Green Synthesis
Kupanga Polycarbonate (PC):
Nzila Iitabelesyi Phosgene: DMC ilaswaangana a bisphenol A (BPA) kwiinda mukubelesya transesterification kuti ipange diphenyl carbonate (DPC), eeyo mpawo yasanduka kuba PC. Eeyi nzila ilasumpula bubotu bwa atomu kusika ku 92% (kweezyanisya a 65% munzila zyakale zya phosgene) mpawo igwisya zintu zitali kabotu.
Kuchita kabotu kwachintu: Ma PC resini azwa muli zyeezyi alapa ≥90% mumuni, kupya kwakupya kwa 135°C, antoomwe a 10% manguzu aakuuma kwiinda PC iizwa ku phosgene, iibelesyegwa muzivwunisyo zyamagesi azyakuvwumbilila malambe aamootokala.
Minsamu azyabulimi:
Nchito zya Methylation: Zitola busena bwa dimethyl sulfate mukupanga misamu yamoyo (nkokuti, nifedipine) amisamu iikola (nkokuti, sertraline), ikusumpula zyakulya a 15-20% a methanol mbuli chintu chomwe chizwa.
Kubelesya kwa Carbonylation: Kubelesyegwa mukupanga carbaryl (misamu iijaya tuzunda) kutegwa kutabi kubola kwa HCl, akucesya muulo a 25%.
Nguzu zipya azibelesyo
Lithium Battery Electrolytes:
Kusanganya a ethylene carbonate (EC) antoomwe a ethyl methyl carbonate (EMC), DMC ilapanga ma electrolytes aali kabotu aajisi nguzu zyakutola ma ionic kusika ku 1.2 mS/cm. Eezi ziyungizya buumi bwabbattery kusika kuziindi zili 1,200 (kubamba manguzu ≥85%), kweendelana amilawu ya EU ya Battery Regulation (2023/0051) yakukwabilila kucheya. Yakazuminwa kale mu Tesla's 4680 mabbattery aakupanga.
Zintu Zikonzya kubola:
Kusanganizigwa a propylene oxide kuti kube polypropylene carbonate (PPC), zintu zyeendelezyegwa a DMC zilanyonyoona 40% CO₂ mpawo zilabola mukati kamyezi iili 6-12, akugwisya tombe lyapulasitiki muzibelesyo zyakutebulu zibelesyegwa biyo chiindi chomwe amafilimu aabulimi.
Zivwumbyo azintu zyakunamatika
Zibelesyo zitanyonganyi busena: Zitola busena bwa toluene/xylene mumapenti aa OEM aamyootokala, akujana VOC ≤50 g/L (munsi kapati a GB 24409-2020). Chiindi chakuyuminizya chacheya kusika kumawoola obile, akuyuma kwafilimu kusika ku 2H.
Zinamatizyo zitajisi formaldehyde: Zibelesyegwa mukujatanizya zintu zyamuŋanda, DMC-based polyurethane adhesives zilijisi formaldehyde iitakwe formaldehyde ≤0.01 mg/m3 (E0 grade), kugwasya IKEA kucesya kuzwa kwa formaldehyde a 500+ tons amwaka.
Bubotu bwabusena amapenzi aabusongo
Twaambo Tupati twakuzumanana
Buvubi bwa Atomu: Zintu zipangwa mbuli methanol zilakonzya kubelesegwa lubo kwiinda mukusanzya, ikucesya COD mumaanzi aasofweede a 70% kweelanisigwa anzila zyakale.
Kujata Kaboni: Ikupanga PC iitakwe phosgene kulacesya kaboni footprint a 45%, mpawo toni lyomwe lyomwe lya DMC lipangwa libelesya 0.6 matani aa CO2 kuzwa mumuwo uuzwa mumaanda aapanga magesi, ikugwasyilizya CCU (kujata akubelesya kaboni).
Migaano yakuchita zintu zipya
Kugwisya muulo: Nzila yakupanga CO2 (kubelesya methanol, CO2, antoomwe a Pd-based catalysts) ilagwisya muulo wazintu zitabelesyegwi a 30%, aawo Sinopec's pilot plant yakajana kupanga kwa kiloton.
Nzila zyakumanizya mapenzi: Inzila yakwaandaanya-kwaandaanya zibeela zyabulowa ilakonzya kuchita kuti DMC ibe aama ion aabutale ≤1 ppb alimwi akusalala ≥99.999%, ikuzuzikizya zyeelelo zya SEMI C87 zyakusalazya semiconductor.
Kubamba zintu munzila iikwabilidwe: Microencapsulated DMC (yakavwumbidwe mu SiO2 nanoshells) ilasumpula busena bwakupya kusika ku 60°C, yakasinizyigwa a TÜV Rheinland kuti ilakwabililwa mukweenzya.
Zitondezyo
| Zina lyachintu | Propionic Acid | |||||||||
| Fomula yaKkemikalu | C3H6O2 | |||||||||
| Kulema kwamolekyula | 74.08 g/mol | |||||||||
| Mbuchiboneka | Maanzi aasalala aatakwe mubala | |||||||||
| Busena bwakunyenguluka | -20.8°C | |||||||||
| Busena Bwabilila | 141.1°C | |||||||||
| Bulemu | 0.993 g/cm3 | |||||||||
| CAS NO | 79 - 09 - 4 | |||||||||
| HS Code | 29155000 | |||||||||
| EINECS NO | 201 - 176 - 3 | |||||||||
| Kulembela | Zibelesyegwa mumapulasitiki, misamu, chakulya, zintu zipa kuti zintu zibe kabotu alimwi amafuta aanunkilila | |||||||||
Pepa lyakweendelezya bubotu
| Zina lyachintu | Propionic Acid | ||||||
| CHINTU | MULEMO UULYEELEDE (%) | BULEMU BWAKUSUNKA(%) | |||||
| Propionic Acid Content, w/%≥ | 99.5 | 99.9 | |||||
| Bupati (20/20°C) | 0.993-0.997 | 0.996 | |||||
| Mweelwe wakubila/℃ | 138.5-142.5 | 139.4-141.1 | |||||
| Kuzwa kwamaanzi, w/%≤ | 0.01 | 0.006 | |||||
| maanzi,w/%≤ | 0.15 | 0.02 | |||||
| Aldehyde,w/%≤ | ≤0.05 | 0.04 | |||||
| kusanduka kuuba, w/%≤ | ≤0.05 | 0.01 | |||||
| Pb mg/kg≤ | 2.0 | ≤2.0 | |||||
| Mbuli mg/kg≤ | 3.0 | ≤3.0 | |||||
| Mamanino | Kotobelezya zyeelelo zya GB 1886.210-2016 | ||||||
Nkaambo nzi Nchotweelede Kusala DMC Yesu?
Nguzu zyone
Kusinizya Kusalala:
Nzila yesu yakuzumanana ya transesterification antoomwe akusanzya ziindi zyotatwe ilapa DMC yamumakkampani (≥99.5%) antoomwe aya magesi (≥99.99%), a methanol ≤100 ppm. Kaambo: Sikuula bbattery uubelesya DMC yesu wakajana 98.7% yakusaanguna kuchaja-kugwisya (mweelwe waakati-kati wamakwebo 95%).
Kukonzya kuchincha:
Nzila zipangidwe kabotu zya asidi (≤0.001 mgKOH/g), busi (≤50 ppm), antoomwe a peroxides (≤5 ppm). Mbuli chitondeezyo, twakapanga DMC iijisi asidi nsyoonto kapati (0.0005 mgKOH/g) yakupanga misamu iitakwe asidi.
Chikozyano chaBuvubi Bwazingulukide:
Zintu zizwa mu methanol zilapilusyigwa kuba muya uutegwa syngas (CO+H2) kuti zipangwe DMC, eezi zipa kuti kube 95% yakubelesya kabotu akugwisya CO2 amatani aali 3 mutani lyomwe lya DMC. Mabbokesi aasofweede asalazyigwa kwiinda mukubelesya CO₂ iiyandika kapati kutegwa 95% ibelesyegwe alimwi.
Kutobelezya munyika yoonse:
Kweendelana a GB/T 1628-2020, ASTM D7056, antoomwe a JIS K 1551. Malebuli aa GHS a MSDS aapangidwe kweendelana aziyandikana muchisi (nkokuti, India BIS, Brazil INMETRO), kupa kuti kube kuzumizigwa kwamawoola aali 72.
Kuchita bupainiya bwa Chemistry butazungaani
Dimethyl Carbonate ilimukubambulula makkampani kwiinda mu "kubula toxic, ibeleka obotu, alimwi ilakonzya kubelesegwa lubo". Tulisungwide kunzila zipya anzila zitabelesyi kaboni, kupa lugwasyo kuzwa kuzintu zitabelesyegwi kusikila kuzibelesyo. Kusala DMC yesu chaamba kubelekela antoomwe akuzumanana—oomo dosi limwi alyalo lisololela kucesya busofwaazi, kubelesya manguzu kabotu, akusumpuka kwabusongo, antoomwe kuyaka buumi bwakumbele butakwe ntenda.