Dimethyl Carbonate (DMC): Intfo lebalulekile lenebuthi lobuphansi, lesebenta kahle kakhulu yekhemikhali lesimamako
Timphahla Temtimba Nemakhemikhali kanye Nekucondza Kwemamolekhyuli
Tinzuzo Tesakhiwo
Buthi Lobuphansi: Nge LD50 (yemlomo, ligundvwane) le 6400 mg/kg, iDMC iphephe kakhulu kunetintfo te methylation tendzabuko (sib., dimethyl sulfate, LD50 = 140 mg/kg), kuhambisana nemtsetfo we EU REACH wekungcolisa titfo letingapheli.
Kuphendvula:
I-Methylation: Lelicembu le-methoxy (−OCH3 ) liniketa emandla ekudluliswa kwelicembu le-methyl leliphephile, litsatsa sikhundla saletinye tindlela letinebuthi.
Kukhicita i-carbonyl: Lelicembu le-carbonyl (−CO−) lenta kutsi kube nekushintjana kwe-ester kanye ne-aminolysis, kusekela kuhlanganiswa kwema-polycarbonates langana-phosgene.
Kuncibilika: Ngekuhlala njalo kwe dielectric kwa 3.1, iDMC ihlangana kahle netidzakamiva, ema ketones, kanye nema esters, ngesikhatsi incibilika kancane emantini (1.6 g/100 mL ku 20°C).
Idatha Lebalulekile Lebonakalako
Indzawo yekubila ye DMC lengu 90.5°C yenta kutsi ilungele kuphendvula lokusemkhatsini wekushisa kanye nekubuyiselwa kwetinhlayiya, kudzinga emandla lamancane nga 30% kunetinchubo letisekelwe ku benzene. Kucina kwayo lokuphansi (0.664 mPa・s) kwenta ncono kugeleta etincenyeni letifana nema electrolytes ebhethri ye lithium, kantsi ne enthalpy yekuhwamuka lengu 363 kJ/kg icinisekisa emazinga ekomisa lasemkhatsini ekugcoka kanye nekunamatsela. Caphela: Libanga layo lekuqhuma (3.1–20.5% vol) lidzinga 防爆 (lekungaqhumi) tinhlelo tekungenisa umoya.
Ticelo Letehlukahlukene Tetimboni
Tintfo letinsha tekuhlanganiswa lokuluhlata
Umkhicito we-Polycarbonate (i-PC):
Inchubo Lete Phosgene: I-DMC ihlangana ne-bisphenol A (BPA) ngekutsi ikhicite i-diphenyl carbonate (DPC), lese iyahlanganiswa ibe yi-PC. Lendlela ikhutsata kusebenta kahle kwe atom kuya ku 92% (vs. 65% yetindlela te phosgene tendzabuko) futsi isusa imikhicito lenebuthi.
Kusebenta Kwemkhicito: Ema-resin e-PC laphumelako aniketa ≥90% wekudluliswa kwekukhanya, lizinga lekushisa lekuhlaneketela lelingu-135°C, kanye nemandla laphakeme e-10% kune-PC lesuselwa ku-phosgene, lesetjentiswa kuma-casings e-elekthronikhi kanye netimbonyo tetibane tetimoto.
Imitsi kanye nemakhemikhali ekulima:
Kuphendvula kwe Methylation: Kutsatsa sikhundla se dimethyl sulfate ekuhlanganiseni imitsi yenhlitiyo (sib., nifedipine) kanye netidzakamiva tekucindzeteleka (sib., sertraline), kwenta ncono umkhicito nga 15–20% nge methanol njengemkhicito lohambisanako kuphela.
Kusebentisa iCarbonylation: Isetjentiswa ekukhiciteni iCarbaryl (sibulala tilwane) kwentela kugwema kugcola kwe HCl, kunciphisa tindleko nga 25%.
Emandla Lamasha Netintfo
Emagezi ebhethri le-Lithium:
Ihlanganiswe ne-ethylene carbonate (EC) kanye ne-ethyl methyl carbonate (EMC), i-DMC idala ema-electrolytes lalinganiselako lanekuhamba kwe-ionic kuze kube ngu-1.2 mS/cm. Loku kwelula imphilo yemjikeleto webhethri ibe tikhatsi letingu-1,200 (kugcinwa kwemandla ≥85%), kuhlangabetana neMtsetfo Webhethri we-EU (2023/0051) webuthi lobuphansi. Kakade wamukelwe ku Tesla sika 4680 ibhethri umkhiqizo.
Tintfo letibolako:
Kuhlanganiswa ne propylene oxide kwenta ipolypropylene carbonate (PPC), tintfo letisekelwe ku DMC timunya 40% we CO2 bese tiyawohloka kungakapheli tinyanga letingu 6–12, tibhekana nemfucuza wepulasitiki etitjeni tetafula letisetjentiswa kanye kanye nemafilimu ekulima.
Tintfo Tekugcobisa & Tinamatseli
Tincibilikisi Letilungele Imvelo: Titsatsa sikhundla se-toluene/xylene kumapendi e-OEM etimoto, tifinyelela lokucuketfwe yi-VOC ≤50 g/L (ngaphansi kakhulu kwemazinga e-GB 24409-2020). Sikhatsi sekomisa sincishiswa sibe ngemahora lamabili, ngekucina kwefilimu kufika ku 2H.
Tintfo Letinamatselako Letingenawo I-Formaldehyde: Tisetjentiswa ekubopheni emaphaneli efenisha, tintfo letinamatselako te-polyurethane letisekelwe ku-DMC tine-formaldehyde yamahhala ≤0.01 mg/m3 (lizinga le-E0), kusita i-IKEA kutsi inciphise kukhishwa kwe-formaldehyde ngemathani langu-500+ ngemnyaka.
Tinzuzo Temvelo & Tinsayeya Tebuchwepheshe
Tintfo letigcamile tekusimama
Umnotfo We Atomic: Imikhicito lefana ne methanol iyaphindze isetjentiswe ngekuvutsiwa, kunciphisa umtfwalo we COD emantini lalahliwe nga 70% uma kucatsaniswa netinchubo tendzabuko.
Kubanjwa Kwekhabhoni: Kuhlanganiswa kwe PC lengasiyo i-phosgene kunciphisa umnyakato wekhabhoni nga 45%, kantsi lithani ngalinye le DMC lekhicitwako lidla emathani langu 0.6 eCO2 kusuka kugesi wemfutfo wesikhungo semandla, kusekela iCCU (kubamba kwekhabhoni kanye nekusetjentiswa).
Imingcele Yekusungula
Kunciphisa Tindleko: Indlela yekuhlanganisa iCO2 ngalokucondzile (kusebentisa imethanol, iCO2, kanye ne Pd-based catalysts) inciphisa tindleko tetintfo letiluhlata nga 30%, ngesitjalo sekulinga se Sinopec lesifinyelela kukhicita ngesikali se kiloton.
Tisombululo Te-Ultra-Purity: Buchwepheshe bekuhlukanisa-kutsatsa ulwelwesi bufinyelela i-DMC yelizinga le-elekthronikhi nge-ions yensimbi ≤1 ppb kanye nekuhlanteka ≥99.999%, kuhlangabetana nemazinga e-SEMI C87 ekuhlanta i-semiconductor.
Kuphatfwa Lokuphephile: I-DMC lefakwe ema-nanoshells e-SiO2) iphakamisa indzawo yekukhanya ibe ngu-60°C, lecinisekisiwe yi-TÜV Rheinland yekuphepha kwekutfutsa.
Tincazelo
| Ligama Lemkhicito | Esidi ye-Propiyoni | |||||||||
| Ifomula Yemakhemikhali | C3H6O2 | |||||||||
| Sisindvo Semamolekhyuli | 74.08 g/moli | |||||||||
| Kuvela | Luketshezi lolusobala lolute umbala | |||||||||
| Liphuzu Lekuncibilika | -20.8°C | |||||||||
| Liphuzu Lekubila | 141.1°C | |||||||||
| Kuminyana | 0.993 g/sentimitha3 | |||||||||
| CAS CHA | 79 - 09 - 4 | |||||||||
| Ikhodi ye-HS | 29155000 | |||||||||
| CHA | 201 - 176 - 3 | |||||||||
| Sicelo | Kusetjentiswa emapulasitiki, i-pharma, kudla, tinhlayiya kanye nemakha | |||||||||
Liphepha Lekulawula Lizinga
| Ligama Lemkhicito | Esidi ye-Propiyoni | ||||||
| INTFO | LINANI LELIJWAYELEKILE (%) | LINANI LEKUVIVINYWA (%) | |||||
| Lokucuketfwe kwe-Esidi Ye-Propionic, w/%≥ | 99.5 | 99.9 | |||||
| Kucina (20/20°C) | 0.993-0.997 | 0.996 | |||||
| Libanga Lekubila/°C | 138,5-142,5 | 139,4-141,1 | |||||
| Tinsalela tekuhhwamuka,w/%≤ | 0.01 | 0.006 | |||||
| Emanti,w/%≤ | 0.15 | 0.02 | |||||
| I-aldehayidi, w/% ≤ | ≤ 0.05 | 0.04 | |||||
| kulula kwenta i-oksijini, w/%≤ | ≤ 0.05 | 0.01 | |||||
| I-Pb mg/kg≤ | 2.0 | ≤2.0 | |||||
| Njengobe mg/kg≤ | 3.0 | ≤3.0 | |||||
| Siphetfo | Hambisana nemazinga e-GB 1886.210-2016 | ||||||
Kungani Sikhetsa I-DMC Yetfu?
Emandla lamane Layinhloko
Sicinisekiso Sebumsulwa:
Inchubo yetfu lechubekako yekukhicita ngekuvutsiwa katsatfu iletsa i-DMC yesigaba setimboni (≥99.5%) kanye nesigaba se-elekthronikhi (≥99.99%), nge-methanol ≤100 ppm. Icala: Ikhasimende lebhethri lisebentisa i-DMC yetfu lizuze 98.7% kusebenta kahle kwekucala kwekushaja-kukhipha (imboni avg. 95%).
Likhono lekwenta ngendlela loyifunako:
Tisombululo letentiwe ngekwemvelo telinani le esidi (≤0.001 mgKOH/g), umswakama (≤50 ppm), kanye nema peroxides (≤5 ppm). Sibonelo, satfutfukisa i-DMC lephansi kakhulu ye-esidi (0.0005 mgKOH / g) yekuhlanganiswa kwemitsi lebucayi esidi.
Imodeli Yemnotfo Loyindingilizi:
Imikhicito ye Methanol iphindze isetjentiswe ibe yi syngas (CO+H2) yekukhicita iDMC, kufinyelela 95% wekusebenta kahle kwetintfo kanye nekunciphisa kukhishwa kwe CO2 ngemathani lamatsatfu ngelithani le DMC. Emaphakethe emfucuza ahlantwa ngekusebentisa i-CO2 lebaluleke kakhulu kute kusetjentiswe kabusha nga-95%.
Kulandzela Umtsetfo Wemhlaba Wonkhe:
Ihambisana ne-GB/T 1628-2020, i-ASTM D7056, ne-JIS K 1551. Emalebuli e-GHS lakhetsiwe kanye ne-MSDS ahlangabetana netidzingo tesifundza (sib., i-BIS yaseNdiya, i-INMETRO yaseBrazil), lenika emandla ekukhishwa kwemasiko emahora langu-72.
Kuvula indlela yekhemikhali lesimamako
Dimethyl Carbonate ibumba kabusha timboni ngetimfanelo tayo "letingekho ebuthini, letisebenta kahle, naletiphindze tisetjentiswe". Sitibophelele etinchubeni letinsha kanye netisombululo letinekhabhoni lephansi, siniketa kusekelwa lokusuka ekugcineni kuya ekugcineni kusuka etimphahleni letiluhlata kuya ekusebentiseni. Kukhetsa i-DMC yetfu kusho kubambisana nekusimama-lapho khona onkhe emaconsi achuba kuncishiswa kwekungcola, kusebentisa emandla kahle, kanye nekutfutfuka kwetebucwepheshe, ndzawonye kwakha likusasa lemakhemikhali leliluhlata.