Dimethyl Carbonate (DMC): Chinhu Chinokosha Chine Chepfu Hushoma, Chinoshanda Zvakanyanya Chemakemikari Anogara Nguva Dzose
Hunhu hweFizikokemikari uye Kunzwisisa kweMolekyuli
Zvakanakira zveMaumbirwo
Huturu Hwakaderera: Ne LD₅₀ (inonwiwa nemuromo, nemakonzo) ye6400 mg/kg, DMC yakachengeteka zvakanyanya kupfuura mishonga yechinyakare yemethylation (semuenzaniso, dimethyl sulfate, LD₅₀ = 140 mg/kg), zvichitevedzera mutemo weEU REACH pazvinosvibisa zvipenyu zvisingagare kwenguva refu.
Kuitazve:
Methylation: Boka remethoxy (−OCH3) rinoita kuti boka remethyl ritapurirwe zvakachengeteka, richitsiva dzimwe nzira dzine chepfu.
Carbonyl: Boka recarbonyl (−CO−) rinobatsira kuchinjana kwema ester uye aminolysis, richitsigira kugadzirwa kwema polycarbonates asina phosgene.
Solvency: Ne dielectric constant ye3.1, DMC inosanganiswa zvakanaka nealcohols, ketones, uye esters, uku ichinyungudika zvishoma mumvura (1.6 g/100 mL pa20°C).
Ruzivo Runokosha Rwemuviri
Kufashaira kweDMC kwe90.5°C kunoita kuti ive yakakodzera kushandiswa pakupisa kuri pakati nepakati uye kudzoreredza solvent, ichida simba shoma ne30% pane maitiro akavakirwa pabenzene. Kusviba kwayo kushoma (0.664 mPa・s) kunowedzera kuyerera kwemvura mumashandisirwo akaita se lithium battery electrolytes, ukuwo enthalpy ye363 kJ/kg inoita kuti pave nekuoma kuri pakati nepakati kwemachira nemanamati. Cherechedza: Kubhururuka kwayo (3.1–20.5% vol) kunoda masisitimu ekufema anodzivirira kuputika.
Mashandisirwo Akasiyana-siyana Emaindasitiri
Kugadzira Zvinhu Zvitsva muGreen Synthesis
Kugadzirwa kwePolycarbonate (PC):
Maitiro Asina Phosgene: DMC inopindirana nebisphenol A (BPA) kuburikidza ne transesterification kuti igadzire diphenyl carbonate (DPC), iyo inozoiswa polymer kuita PC. Nzira iyi inowedzera kushanda kwemaatomu kusvika 92% (zvichienzaniswa ne65% yenzira dzechinyakare dzephosgene) uye inobvisa zvinhu zvine chepfu.
Mashandiro Echigadzirwa: Maresin ePC anowanikwa anopa ≥90% yekufambisa chiedza, tembiricha yekukanganisa kupisa ye135°C, uye simba rekukanganisa rakakwirira ne10% kupfuura maPC anobva kuphosgene, anoshandiswa mumakesi emagetsi uye mumakavha emagetsi emotokari.
Mishonga & Makemikoro Ekurima:
Maitiro eMethylation: Inotsiva dimethyl sulfate mukugadzira mishonga yemwoyo (semuenzaniso, nifedipine) uye mishonga yekudzora kushungurudzika (semuenzaniso, sertraline), ichivandudza goho ne15–20% ne methanol semugumisiro wega.
Mashandisirwo eCarbonylation: Inoshandiswa mukugadzira carbaryl (mishonga inouraya zvipembenene) kudzivirira ngura yeHCl, zvichideredza mitengo ne25%.
Simba Itsva & Zvishandiso
Maelectrolyte eLithium Battery:
Yakasanganiswa ne ethylene carbonate (EC) uye ethyl methyl carbonate (EMC), DMC inogadzira ma electrolyte akaenzana ane ionic conductivity inosvika 1.2 mS/cm. Izvi zvinowedzera hupenyu hwebhatiri kusvika ka1,200 (kuchengetwa kwesimba ≥85%), zvichizadzisa EU Battery Regulation (2023/0051) yekudzivirira chepfu shoma. Yakatoshandiswa mukugadzirwa kwemabhatiri eTesla e4680.
Zvinhu Zvinoora:
Zvichishandiswa kuporimeri nepropylene oxide kuti zvigadzire polypropylene carbonate (PPC), zvinhu zvakagadzirwa neDMC zvinotora 40% CO₂ uye zvinoora mukati memwedzi 6-12, zvichigadzirisa marara epurasitiki mumidziyo yekudya inoshandiswa kamwe chete uye mumafirimu ekurima.
Mapendi & Zvinonamira
Zvinonyungudutsa Zvisingakuvadzi Kuchengetedza Ruzivo: Zvinotsiva toluene/xylene mumapendi eOEM emotokari, zvichisvika pahuwandu hweVOC ≤50 g/L (pasi pezvinodiwa zveGB 24409-2020). Nguva yekuomesa inoderedzwa kusvika kumaawa maviri, kuomarara kwefirimu kuchisvika 2H.
Zvinonamira Zvisina Formaldehyde: Zvinoshandiswa mukubatanidza fenicha, zvinonamira zve polyurethane zvakagadzirwa neDMC zvine formaldehyde yakasununguka ≤0.01 mg/m³ (E0 grade), zvichibatsira IKEA kuderedza kuburitswa kwe formaldehyde nematani anopfuura mazana mashanu pagore.
Zvakanakira Zvezvakatipoteredza & Matambudziko Ehunyanzvi
Zvinhu Zvinokosha Nezvekuchengetedza Kugara Kuchienderera Mberi
Kubudirira kweAtomu: Zvigadzirwa zvakaita semethanol zvinogona kushandiswazve kuburikidza nekudiridza, zvichideredza huwandu hweCOD mumvura yakasviba ne70% zvichienzaniswa nemaitiro echinyakare.
Kubatwa kweCarbon: Kugadzirwa kwePC isiri phosgene kunoderedza mafambiro ecarbon ne45%, nepo tani yega yega yeDMC inogadzirwa ichidya matani 0.6 eCO₂ kubva mugasi remagetsi rinobuda mumagetsi, zvichitsigira CCU (kutora nekushandisa carbon).
Miganhu Yekuvandudza Zvinhu
Kuderedza Mutengo: Nzira yekugadzira CO₂ zvakananga (ichishandisa methanol, CO₂, uye Pd-based catalysts) inoderedza mitengo yezvinhu zvakabikwa ne30%, nepo Sinopec's pilot plant ichiwana kugadzirwa kwe kiloton-scale.
Mhinduro dzeKuchena Kwakanyanya: Tekinoroji yekuparadzanisa nekudzikisa membrane inoita kuti DMC ive yemhando yepamusoro ine ma ions esimbi ≤1 ppb uye kuchena ≥99.999%, zvichisangana nezvinodiwa zveSEMI C87 zvekuchenesa semiconductor.
Zvinhu Zvakachengeteka: Microencapsulated DMC (yakaputirwa neSiO₂ nanoshells) inokwidza flash point kusvika 60°C, yakasimbiswa neTÜV Rheinland yekuchengetedza mafambiro.
Magadzirirwo
| Zita rechigadzirwa | Propionic Acid | |||||||||
| Fomura yeMakemikari | C3H6O2 | |||||||||
| Kurema kweMorekuru | 74.08 g/mol | |||||||||
| Chitarisiko | Mvura inoonekera isina ruvara | |||||||||
| Nzvimbo Yokunyunguduka | -20.8℃ | |||||||||
| Nzvimbo Yokubikira | 141.1℃ | |||||||||
| Kuwanda kwevanhu | 0.993 g/cm³ | |||||||||
| Nhamba yeCAS | 79 - 09 - 4 | |||||||||
| Kodhi yeHS | 29155000 | |||||||||
| EINECS Kwete | 201 - 176 - 3 | |||||||||
| Kushandiswa | Inoshandiswa mumapurasitiki, mishonga, chikafu, zvinonyungudutsa uye zvinonhuhwirira | |||||||||
Pepa Rekudzora Hunhu
| Zita rechigadzirwa | Propionic Acid | ||||||
| CHINHU | Kukosha Kwakajairika (%) | Kukosha kwekuyedza (%) | |||||
| Zviri mukati mePropionic Acid, w/%≥ | 99.5 | 99.9 | |||||
| Kuwanda (20/20 ℃) | 0.993-0.997 | 0.996 | |||||
| Kufashaira Kwemvura/℃ | 138.5-142.5 | 139.4-141.1 | |||||
| Zvisaririra zvemvura, w/%≤ | 0.01 | 0.006 | |||||
| Mvura, w/%≤ | 0.15 | 0.02 | |||||
| Aldehyde, w/%≤ | ≤0.05 | 0.04 | |||||
| nyore oxidization, w/%≤ | ≤0.05 | 0.01 | |||||
| Pb mg/kg≤ | 2.0 | ≤2.0 | |||||
| Sezvo mg/kg≤ | 3.0 | ≤3.0 | |||||
| Mhedziso | Tevedzera zvinodiwa zveGB 1886.210-2016 | ||||||
Sei Uchifanira Kusarudza DMC Yedu?
Simba Mana Guru
Kuvimbiswa Kwekuchena:
Maitiro edu ekuchinja-chinja maester nekuita triple distillation anopa DMC yemhando yeindasitiri (≥99.5%) uye electronic-grade (≥99.99%), ine methanol ≤100 ppm. Chivharo: Mutengi webhatiri achishandisa DMC yedu akawana 98.7% first charge-discharge efficiency (avhareji ye95%).
Kugona Kwekugadzirisa:
Mhinduro dzakagadzirwa zvakanangana ne acid value (≤0.001 mgKOH/g), hunyoro (≤50 ppm), uye peroxides (≤5 ppm). Semuenzaniso, takagadzira ultra-low acid DMC (0.0005 mgKOH/g) yekugadzira mishonga inonzwa acid.
Muenzaniso wehupfumi hwakatenderera:
Zvigadzirwa zveMethanol zvinodzokororwa kuita syngas (CO+H₂) kuti zvigadzirwe neDMC, zvichiita kuti zvinhu zvishande zvakanaka ne95% uye zvinoderedza kuburitswa kweCO₂ nematani matatu patani yeDMC. Marara anocheneswa neCO₂ inokosheswa zvakanyanya kuti 95% ishandiswezve.
Kutevedzera Mutemo Wepasi Rose:
Zvinoenderana neGB/T 1628-2020, ASTM D7056, uye JIS K 1551. Mazita eGHS akagadzirwa uye MSDS zvinosangana nezvinodiwa zvemudunhu (semuenzaniso, India BIS, Brazil INMETRO), zvichiita kuti zvibviswe mumaawa makumi manomwe nemaviri.
Kupayona Chemistry Inogarika
Dimethyl Carbonate iri kuumba maindasitiri kuburikidza nehunhu hwayo "husina chepfu, hunoshanda zvakanaka, uye hunodzokororwa". Tinozvipira kune maitiro matsva uye mhinduro dzisina kabhoni yakawanda, tichipa rutsigiro kubva pazvinhu zvakagadzirwa kusvika kune zvinoshandiswa. Kusarudza DMC yedu kunoreva kushanda pamwe chete nekuchengetedza nguva—apo donhwe rega rega rinoderedza kusvibiswa, kushanda zvakanaka kwesimba, uye kufambira mberi kwetekinoroji, pamwe chete tichivaka remangwana remakemikari akasvibirira.