I-Dimethyl Carbonate (DMC): Isixhobo esingundoqo esingenatyhefu iphantsi, esisebenza kakuhle kakhulu kwiKhemistri ezinzileyo
Iipropati zeFizikokhemikhali kunye nokuqonda kweMolekyuli
Iingenelo zeZakhiwo
Ubuthi obuphantsi: Nge-LD₅₀ (yomlomo, iimpuku) ye-6400 mg/kg, i-DMC ikhuselekile kakhulu kunee-methylation agents zemveli (umz., i-dimethyl sulfate, i-LD₅₀ = 140 mg/kg), ithobela ummiselo we-EU REACH kwiingcolisi zendalo ezingapheziyo.
Ukusabela kwakhona:
I-Methylation: Iqela le-methoxy (−OCH3) lenza ukuba iqela le-methyl likwazi ukudluliselwa ngokukhuselekileyo, lithathe indawo yezinye iindlela ezinobuthi.
I-Carbonyl: Iqela le-carbonyl (−CO−) lenza kube lula ukutshintshiselana kwee-ester kunye ne-aminolysis, lixhasa ukwenziwa kwee-polycarbonates ezingena-phosgene.
I-Solvency: Nge-dielectric constant eyi-3.1, i-DMC ixubana kakuhle ne-alcohols, ii-ketones, kunye nee-esters, ngelixa inyibilika kancinci emanzini (1.6 g/100 mL kwi-20°C).
Idatha Ebalulekileyo Ebonakalayo
Iqondo lokubila le-DMC elingama-90.5°C lenza ukuba lifaneleke kwiimpendulo zobushushu obuphakathi kunye nokubuyiselwa kwesinyibilikisi, lifuna amandla angaphantsi kwama-30% kuneenkqubo ezisekwe kwi-benzene. I-viscosity yayo ephantsi (0.664 mPa・s) iphucula ukuhamba kwamanzi kwizicelo ezifana nee-electrolytes zebhetri ye-lithium, ngelixa i-enthalpy yomphunga engama-363 kJ/kg iqinisekisa amazinga okomisa aphakathi kwiingubo kunye nezincamathelisi. Qaphela: Uluhlu lwayo oluqhumayo (3.1–20.5% vol) lufuna iinkqubo zomoya ezithintela ukuqhuma.
Izicelo ezahlukeneyo zemizi-mveliso
Uyilo lweGreen Synthesis
Imveliso yePolycarbonate (PC):
Inkqubo EngenaPhosgene: I-DMC isabela kwi-bisphenol A (BPA) nge-transesterification ukuvelisa i-diphenyl carbonate (DPC), emva koko i-polymerized ibe yi-PC. Le ndlela yonyusa ukusebenza kakuhle kwe-atom ukuya kwi-92% (xa kuthelekiswa ne-65% kwiindlela zemveli ze-phosgene) kwaye isusa iimveliso ezinobungozi.
Ukusebenza kweMveliso: Ii-resin zePC eziphumayo zibonelela ngokuhanjiswa kokukhanya okungaphezulu kwama-90%, ubushushu obuguquguqukayo bobushushu obuyi-135°C, kunye namandla aphezulu nge-10% kune-PC ephuma kwi-phosgene, esetyenziswa kwiikhabhathi ze-elektroniki kunye nezigqubuthelo zezibane zemoto.
Amayeza kunye neekhemikhali zezolimo:
Iimpendulo zeMethylation: Ithatha indawo ye-dimethyl sulfate ekwakhiweni kwamayeza entliziyo (umz., i-nifedipine) kunye neyeza zokudakumba (umz., i-sertraline), iphucula isivuno nge-15–20% nge-methanol njengemveliso ephumayo.
Ukusetyenziswa kweCarbonyl: Isetyenziswa kwimveliso ye-carbaryl (i-pesticide) ukuthintela ukugqwala kwe-HCl, okunciphisa iindleko nge-25%.
Amandla Amatsha kunye nezixhobo
Ii-Electrolyte zeLithium Battery:
Ixutywe ne-ethylene carbonate (EC) kunye ne-ethyl methyl carbonate (EMC), i-DMC idala ii-electrolytes ezilungelelanisiweyo ezine-ionic conductivity ukuya kuthi ga kwi-1.2 mS/cm. Oku kwandisa ubomi bomjikelo webhetri ukuya kuthi ga kwi-1,200 amaxesha (ukugcinwa komthamo ≥85%), oku kufezekisa uMgaqo weBhetri we-EU (2023/0051) wobutyhefu obuphantsi. Sele yamkelwe kwimveliso yebhetri ye-4680 yeTesla.
Izinto ezibolayo:
Zifakwe i-copolymer nge-propylene oxide ukuze zenze i-polypropylene carbonate (PPC), izinto ezisekwe kwi-DMC zifunxa i-40% ye-CO₂ kwaye zonakale kwiinyanga ezi-6-12, zijongana nenkunkuma yeplastiki kwiitafile ezisetyenziswa kanye kunye neefilimu zezolimo.
Iingubo kunye nezincamathelisi
Izinyibilikisi Ezinobuhlobo Nokusingqongileyo: Zithatha indawo ye-toluene/xylene kwiipeyinti ze-OEM zeemoto, zifikelela kumxholo we-VOC ≤50 g/L (ngaphantsi kakhulu kwemigangatho ye-GB 24409-2020). Ixesha lokomisa lincitshiswa ukuya kwiiyure ezi-2, ubunzima befilimu bufikelela kwiiyure ezi-2.
Izincamathelisi EzingenaFormaldehyde: Ezisetyenziswa ekubopheleleni kwefenitshala, izincamathelisi zepolyurethane ezisekwe kwiDMC zine-formaldehyde yasimahla ≤0.01 mg/m³ (umgangatho we-E0), zinceda i-IKEA ukunciphisa ukukhutshwa kwe-formaldehyde ngeetoni ezingama-500+ ngonyaka.
Iingenelo zeNdalo kunye nemingeni yoBugcisa
Izinto Ezibalulekileyo Ezibalulekileyo Ekuqhubekeni Kozinzo
Uqoqosho lweAtomic: Iimveliso ezifana ne-methanol zinokuphinda zisetyenziswe nge-distillation, nto leyo enciphisa umthwalo we-COD emanzini amdaka ngama-70% xa kuthelekiswa neenkqubo zemveli.
Ukubanjwa kweCarbon: Ukwenziwa kwePC okungeyiyo i-phosgene kunciphisa umngcipheko wekhabhoni ngama-45%, ngelixa itoni nganye ye-DMC eveliswayo itya iitoni ezingama-0.6 ze-CO₂ ezivela kwigesi yolwelo lwezityalo zamandla, ixhasa i-CCU (ukubanjwa kunye nokusetyenziswa kwekhabhoni).
Imida yoBuchule
Ukuncitshiswa kweendleko: Indlela yokwenza i-CO₂ ngqo (esebenzisa i-methanol, i-CO₂, kunye nee-catalysts ezisekelwe kwi-Pd) inciphisa iindleko zezinto eziluhlaza ngama-30%, apho isityalo sovavanyo seSinopec sifikelela kwimveliso yesikali se-kiloton.
Izisombululo ze-Ultra-Purity: Itekhnoloji yokwahlulwa kwe-membrane-adsorption ifezekisa i-DMC ye-elektroniki-grade ngee-ion zesinyithi ≤1 ppb kunye nobumsulwa ≥99.999%, ihlangabezana nemigangatho ye-SEMI C87 yokucoca i-semiconductor.
I-Safe Logistics: I-Microencapsulated DMC (egqunywe ngee-nanoshells ze-SiO₂) inyusa i-flash point iye kwi-60°C, eqinisekiswe yi-TÜV Rheinland yokhuseleko kwezothutho.
Iinkcukacha
| Igama lemveliso | I-Propionic Acid | |||||||||
| Ifomula yeKhemikhali | C3H6O2 | |||||||||
| Ubunzima beMolekyuli | 74.08 g/mol | |||||||||
| Inkangeleko | Ulwelo olungabonakaliyo olungenambala | |||||||||
| Indawo yokunyibilika | -20.8℃ | |||||||||
| Indawo yokubilisa | 141.1℃ | |||||||||
| Uxinano | 0.993 g/cm³ | |||||||||
| INOMBOLO YE-CAS | 79 - 09 - 4 | |||||||||
| Ikhowudi ye-HS | 29155000 | |||||||||
| Hayi i-EINECS | 201 - 176 - 3 | |||||||||
| Isicelo | Isetyenziswa kwiiplastiki, kwiikhemesti, ekutyeni, kwizinyibilikisi nakwiivumba | |||||||||
Iphepha Lolawulo Lomgangatho
| Igama lemveliso | I-Propionic Acid | ||||||
| INTO | IXABISO ELIQHELEKILEYO(%) | IXABISO LOVAVANYO(%) | |||||
| Umxholo we-Propionic Acid, w/%≥ | 99.5 | 99.9 | |||||
| Uxinano （20/20 ℃） | 0.993-0.997 | 0.996 | |||||
| Uluhlu lokuBilisa/℃ | 138.5-142.5 | 139.4-141.1 | |||||
| Intsalela yomphunga, w/% ≤ | 0.01 | 0.006 | |||||
| Amanzi, w/%≤ | 0.15 | 0.02 | |||||
| I-Aldehyde, w/%≤ | ≤0.05 | 0.04 | |||||
| i-oxidization elula, w/%≤ | ≤0.05 | 0.01 | |||||
| I-Pb mg/kg≤ | 2.0 | ≤2.0 | |||||
| Njengoko mg/kg≤ | 3.0 | ≤3.0 | |||||
| Isiphelo | Thobela imigangatho ye-GB 1886.210-2016 | ||||||
Kutheni Ukhetha i-DMC Yethu?
Amandla amane angundoqo
Isiqinisekiso soBumsulwa:
Inkqubo yethu eqhubekayo yokuguqula i-esterification nge-triple distillation inika i-DMC yezinga lezimboni (≥99.5%) kunye ne-electronic-grade (≥99.99%), kunye ne-methanol ≤100 ppm. Ityala: Umthengi webhetri osebenzisa i-DMC yethu ufumene i-98.7% yokusebenza kakuhle kokukhupha itshaja yokuqala (umndilili we-95%).
Ubuchule bokwenza ngokwezifiso:
Izisombululo ezenzelwe wena zexabiso le-asidi (≤0.001 mgKOH/g), ukufuma (≤50 ppm), kunye ne-peroxides (≤5 ppm). Umzekelo, siphuhlise i-DMC ye-asidi ephantsi kakhulu (0.0005 mgKOH/g) yokwenza amayeza anovakalelo lwe-asidi.
Imodeli yoQoqosho oluSijikelezileyo:
Iimveliso zeMethanol eziphuma kwi-Methanol ziyaphinda zisetyenziswe zibe yi-syngas (CO+H₂) ukuze kuveliswe i-DMC, zifezekisa ukusebenza kakuhle kwezinto ezingama-95% kwaye zinciphisa ukukhutshwa kwe-CO₂ ngeetoni ezi-3 ngetoni nganye ye-DMC. Ukupakisha inkunkuma kucocwa nge-CO₂ ebaluleke kakhulu ukuze kusetyenziswe kwakhona ngama-95%.
Ukuthobela imithetho kwihlabathi liphela:
Ihambelana ne-GB/T 1628-2020, i-ASTM D7056, kunye ne-JIS K 1551. Iileyibhile ze-GHS ezenziwe ngokwezifiso kunye ne-MSDS ziyahlangabezana neemfuno zengingqi (umz., i-India BIS, i-Brazil INMETRO), okuvumela ukuvunyelwa kwerhafu iiyure ezingama-72.
Ukuqala iKhemistri eZinzileyo
I-Dimethyl Carbonate iphinda ibumbe amashishini ngokusebenzisa iimpawu zayo "ezingenabungozi, ezisebenzayo, nezinokuphinde zisetyenziswe". Sizibophelela kwiinkqubo ezintsha kunye nezisombululo ezinekhabhoni ephantsi, sinikezela ngenkxaso ukusuka kwizinto eziluhlaza ukuya kwizicelo. Ukukhetha i-DMC yethu kuthetha ukusebenzisana nokuzinza—apho ithontsi ngalinye liqhuba ukunciphisa ungcoliseko, ukusebenza kakuhle kwamandla, kunye nokuqhubela phambili kwezobuchwepheshe, kunye nokwakha ikamva leekhemikhali eziluhlaza.