Dimethyl Carbonate (DMC)

DMC Txheej txheem cej luam

 

Dimethyl Carbonate (abbreviated liDMC), nrog cov qauv molecular CHO, yog cov tshuaj lom neeg tsawg, biodegradable ntsuab nplua-tshuaj nruab nrab ntawm carbonate esters. Nws yog cov kua uas tsis muaj xim pob tshab ntawm qhov kub thiab txias nrog cov ntxhiab tsw ntxhiab ester zoo li ntxhiab tsw. Nws cov qauv molecular muaj active pab pawg xws li methyl, methoxy thiab carbonyl pawg, endowing nws nrog ob qho tib si methylation thiab carbonylation reactivity. Nws tuaj yeem hloov cov ntaub ntawv muaj kuab lom heev xws li phosgene thiab dimethyl sulfate.

Featuring zoo heev dissolving muaj peev xwm, DMC pab tsis tau tsuas yog raws li ib puag ncig-phooj ywg hnyav tab sis kuj yog ib tug tseem ceeb raw khoom rau lithium-ion roj teeb electrolytes. Cov khoom lag luam muaj nyob hauv cov khoom lag luam poob rau hauv ob qib: qib kev lag luam thiab qib roj teeb. Ob qib sib txawv hauv kev tswj cov impurities xws li dej cov ntsiab lus, methanol, hlau ions thiab chloride ions, thiab yuav tsum tsis txhob siv interchangeably arbitrarily.

 

Cov kev lag luam tseem ceeb hauv Suav teb yog alkylene oxide transesterification, ua raws li methanol oxidative carbonylation. Cov txheej txheem phosgene-raws li cov txheej txheem ib txwm muaj feem ntau cuam tshuam vim muaj tshuaj lom ntau.

Alkylene Oxide Transesterification txheej txheem

Propylene carbonate (PC) los yog ethylene carbonate (EC) yog thawj zaug synthesized los ntawm propylene oxide (PO) / ethylene oxide (EO) thiab CO, thiab tom qab ntawd nkag mus rau transesterification nrog methanol kom tawm los DMC, nrog propylene glycol lossis ethylene glycol raws li cov khoom lag luam. Cov txheej txheem reactive-distillation coupling yog saws los ua txhaum methanol-DMC azeotrope rau kev sib cais cov khoom zoo. Txoj kev no ua kom yooj yim rau kev npaj cov khoom lag luam siab. Nws yog cov txheej txheem tsim khoom loj rau roj teeb-qib DMC, nta cov khoom siv raw khoom txaus thiab tsim nyog rau kev tsim khoom loj.

Methanol Oxidative Carbonylation txheej txheem

DMC yog tsim ncaj qha los ntawm methanol, carbon monoxide thiab oxygen tshaj cov txheej txheem catalyst tshwj xeeb. Nws muab cov txiaj ntsig zoo atom kev lag luam nrog dej ua ib qho khoom los ntawm cov khoom. Txawm li cas los xij, muaj teeb meem txog cov khoom siv corrosion thiab catalyst stability tswj. Hauv Suav teb, cov txheej txheem no feem ntau yog siv rau kev lag luam-qib DMC ntau lawm.

Qib sib txawv feem ntau nyob rau hauv kev tswj precision ntawm kab impurities. Roj teeb-qib DMC imposes cov kev cai nruj heev ntawm cov hlau ions thiab polar residual impurities. Industrial-qib los yog refined-industrial-qib DMC yuav tsum tsis txhob raug downgraded thiab hloov rau lithium-ion-battery electrolyte manufacturing.

Upstream Raw Khoom

Cov khoom noj khoom haus tseem ceeb rau DMC suav nrog methanol, propylene oxide / ethylene oxide thiab carbon dioxide, ua ke nrog ntau yam catalytic auxiliaries. Cov nqi lag luam ntawm methanol thiab alkylene oxides yog qhov tseem ceeb ntawm DMC cov nqi tsim khoom.

Cov ntawv thov hauv qab

Lithium-ion-Battery Electrolyte Kev Lag Luam: Nrog cov viscosity tsawg thiab kev ua tau zoo ntawm qhov kub thiab txias, DMC ua cov kuab tshuaj tseem ceeb rau electrolytes ntawm cov neeg siv roj teeb, cov roj teeb hluav taws xob thiab cov roj teeb lub zog. Formulated ua ke nrog EC, EMC thiab DEC, nws dissolves lithium ntsev thiab xyuas kom meej lithium-ion conduction, ua rau nws yog ib qho tseem ceeb cov ntaub ntawv rau lub tshiab-zog industrial saw.

Ntsuab Synthetic Intermediate: Siv raws li cov tshuaj methylation thiab carbonylation reagent los hloov cov tshuaj lom phosgene thiab dimethyl sulfate rau cov synthesis ntawm kws tshuaj, tshuaj tua kab thiab polycarbonate polymers.

Ib puag ncig-phooj ywg Industrial Solvent: Siv nyob rau hauv high-khoom-cov ntsiab lus coatings thiab adhesives rau ib nrab hloov acetone, MEK, toluene thiab qis zog toxicity thiab VOC emissions.

Lwm yam teb: Extractants, ntxuav cov neeg ua haujlwm, roj oxygenated additives (kev tshawb fawb-theem nkaus xwb), tshwj xeeb organic-synthesis cov tshuaj tiv thaiv.

DMC muaj qhov taw tes qis qis thiab yog cov nplaim taws heev. Nws cov vapor hnyav dua li huab cua thiab tuaj yeem kis mus rau hauv av kom ignite los ntawm qhov chaw taws teeb nyob deb. Muab faib ua Class 3 flammable kua tshuaj lom neeg, nws yuav tsum tau tuav, khaws cia thiab thauj nruj me ntsis raws li kev cai phom sij-tshuaj lom neeg.

Kev Cia Siab: Khaws rau hauv lub tsev khaws khoom tawg-pov thawj-tshuaj lom-tshuaj lom neeg uas muaj cua txias thiab cua txias; khaws cov khoom kub hauv qab 30 degree. Khaws cov thawv ntim tag nrho nrog cov khoom tiv thaiv zoo li qub. Khaws rau hauv ib cheeb tsam. Tsis txhob khaws cia ua ke nrog cov tshuaj muaj zog oxidizing lossis muaj zog acids.

Tiv thaiv hluav taws kub & tawg: Vapor tuaj yeem tsim cov khoom tawg nrog cua. Tshem tawm tag nrho cov nplaim taws qhib thiab hluav taws xob zoo li qub hauv thaj chaw warehouse. Siv cov khoom siv hluav taws xob tawg. Nruab nrog cov khoom siv hluav taws xob hluav taws xob thiab cov hmoov qhuav / dej cawv-resistant ua npuas dej-sib ntaus apparatus.

Kev tiv thaiv kev ua haujlwm: Vapor irritates qhov muag thiab ua pa mucosa; kua sib cuag ntawm daim tawv nqaij ua rau degreasing irritation. Hnav cov organic-vapour respirators, tsom iav kev nyab xeeb thiab cov hnab looj tes hnyav thaum ua haujlwm; tswj kev ua cua txias hauv thaj chaw ua haujlwm.

Kev Tswj Xyuas Kev Thauj Khoom: Tsheb thauj mus los raws li UN 1161 Chav Kawm 3 flammable phom sij ua kua. Nkoj nyob rau hauv kaw galvanized steel nruas, IBC intermediate bulk ntim los yog ISO TANK ntim. Tiv thaiv los ntawm kev tshav ntuj ncaj qha, kub thiab txias. Tsis txhob thauj khoom ua ke nrog oxidizing agents lossis khoom noj khoom haus.

Q: Yuav ua li cas xaiv thiab paub qhov txawv ntawm DMC thiab propylene carbonate (PC)?

A: Ob leeg yog carbonate esters. Lawv qhov sib txawv loj yog nyob rau hauv viscosity, dielectric tas li, kev ua haujlwm kub qis thiab electrochemical compatibility. DMC nta qis viscosity thiab zoo low-temperature fluidity, ua rau nws haum raws li diluent hnyav rau electrolytes; Txawm li cas los xij, nws qhov dielectric tas li yog qhov tsawg thiab nws tsis tuaj yeem ua kom tiav cov ntsev lithium thaum siv ib leeg. PC muaj ib tug siab dielectric tas li thiab muaj zog dissolving muaj peev xwm, tab sis nws yog nquag mus rau hnyav co-intercalation rau hauv graphite anodes. Nws feem ntau tsis yog siv los ua cov kuab tshuaj tseem ceeb rau cov roj teeb lithium-ion ua lag luam (cov tshuaj me me tuaj yeem muab ntxiv rau hauv cov qauv tshwj xeeb high-concentration). PC feem ntau yog siv rau high-voltage capacitors thiab txheej hnyav. Lithium-ion- roj teeb electrolyte tshuab feem ntau yog sib xyaw ntawm ntau cov carbonates; txwv tsis pub hloov ib-rau-ib zaug.

Q: Yuav ua li cas xaiv ntawm industrial-qib, refined-industrial-qib thiab roj teeb-qib DMC?

A: Peb qib qhia cov qauv tshuaj molecular zoo tib yam. Lawv qhov kev sib txawv tseem ceeb nyob hauv kev tswj xyuas qhov tseeb rau cov kab tsis huv xws li dej, methanol, chloride ions thiab hlau ions, thiab lawv tsis tuaj yeem hloov ib leeg hauv cov ntawv thov scenarios. Muaj-qib DMC xa cov nqi ua haujlwm tau zoo nrog cov tsim nyog impurities, haum rau cov txheej txheem, cov nplaum thiab cov organic synthesis. Refined-industrial-qib DMC nta nruj tswj dej thiab lub teeb-ntim impurities rau high-end coatings thiab dav dav zoo-tshuaj tshuaj tiv thaiv. Roj teeb-qib DMC tau ua kom huv si sib sib zog nqus los ntawm kev kho kom zoo thiab adsorption, nrog dej, chloride ions thiab hlau ions tswj mus rau ppm lossis txawm tias ppb qib, thiab tshwj xeeb rau kev tsim cov lithium-ion-roj teeb electrolyte. Kev hloov pauv nrog qib kev lag luam lossis kev ua kom zoo-industrial-qib DMC yog nruj me ntsis txwv tsis pub nyob rau hauv lithium-battery manufacturing.

Q: Dab tsi yog qhov kev lag luam zoo ntawm Tuam Tshoj DMC kev lag luam?

A: Tuam Tshoj yog tus tsim khoom loj tshaj plaws hauv ntiaj teb thiab cov neeg siv khoom ntawm DMC nrog cov muaj zog muaj zog. Kev txhawb nqa los ntawm cov khoom siv hauv tsev txaus ntawm methanol thiab propylene oxide, Tuam Tshoj tau paub tab transesterification thiab oxidative carbonylation txheej txheem thiab ua rau thoob ntiaj teb hauv kev tsim khoom. Hauv tsev sib sib zog nqus-purification thiab hlau-ion-tshem tawm thev naus laus zis rau roj teeb-qib DMC tau mus txog qib siab thoob ntiaj teb. Cov khoom lag luam tag nrho suav nrog qib kev lag luam, qib ua kom zoo thiab qib roj teeb-qib DMC tuaj yeem tsim khoom loj los ua kom tau raws li kev lag luam xav tau los ntawm cov roj teeb lithium-roj tshiab, nplua-tshuaj lom neeg thiab txheej txheej lag luam. Cov saw hlau xa tawm tiav yog muaj nrog cov ntaub ntawv ua raws li REACH thiab GHS.

Parameters, txheej txheem thiab cov ntaub ntawv kev lag luam hauv cov ntaub ntawv no yog muab tso ua ke los ntawm cov ntaub ntawv pov thawj-muaj peev xwm rau kev siv nkaus xwb:

ICSC International Chemical Safety Cards, ChemicalBook Physical-Property Database (CAS 616-38-6) - Cov cim qhia txog lub cev thiab kev phom sij

Merck / Sigma-Aldrich DMC cov ntaub ntawv qhia txog cov khoom lag luam - lub cev-cov khoom tsis muaj xws li qhov ntom ntom, flash point thiab vapor siab

2025-2026 Tuam Tshoj DMC Kev Tshawb Fawb Kev Lag Luam Tshaj Tawm - cov peev txheej tsim khoom, cov txheej txheem cov txheej txheem thiab cov qauv hauv qab

• Tshawb nrhiav Shanghai Dingwujin Chemical Co., Ltd. organic-solvents khoom,DMC