Sodium Methanesulfinateyog ib qho organic compound. Nws feem ntau tshwm li cov hmoov dawb mus rau greyish dawb los yog siv lead ua uas tsis muaj ntxhiab tsw tshwj xeeb. Thaum kub kub, sodium methane sulfite tuaj yeem pom me ntsis sublimation. Thaum rhuab mus txog 120 degree, sodium methanesulfite yuav plam nws cov dej crystalline thiab maj mam decompose. Piv txwv li, nws muaj qhov txo qis thiab tuaj yeem hnov mob nrog hydrogen peroxide hauv acidic lossis nruab nrab aqueous daws los tsim peroxymethane sulfite. Peroxymethane sulfite tsis ruaj khov thiab sai sai decomposes rau hauv sulfate ions, dej, thiab oxygen. Tsis tas li ntawd, sodium methanesulfonate kuj tuaj yeem raug oxidation - txo cov tshuaj tiv thaiv nrog hypochlorous acid, tsim chloromethane, sulfate ions, thiab dej. Lub conjugated ntxiv ntawm sodium methanesulfonate nrog vinyl heterocycles tau piav qhia. Kawm txog kev sib txuas lus sib txuas ntawm arylboronic acid thiab sodium methanesulfonate. Nws cov tshuaj cia yog tsim los ntawm kev ntxiv 1 qhov sib npaug ntawm sodium hydroxide rau methanesulfonic acid thiab diluting rau 4M. Khaws lub thawv kaw, khaws cia rau hauv lub thawv kaw, hauv qhov chaw txias thiab qhuav, tsis txhob sib cuag nrog oxides thiab noo noo, siv thiab khaws cia raws li cov lus qhia yam tsis muaj kev puas tsuaj.
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Tshuaj Formula |
CH3NaO2S |
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Exact Mass |
102 |
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Molecular Luj |
102 |
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m/z |
102 (100.0%), 104 (4.5%), 103 (1.1%) |
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Elemental Analysis |
C, 11,77; H, 2,96; Na, 22.52; O, 31.35; Nws. Ib., 31.41 |
Sodium methanesulfinate, yog ib qho ntsev inorganic nrog cov khoom sib txawv thiab kev siv. Nws zoo nkaus li dawb, crystalline khoom uas yog soluble hauv dej, tsim cov kua dej. Qhov sib xyaw no yog tus cwj pwm los ntawm kev muaj cov pab pawg sulfinate (SO2-), qhov twg ib qho ntawm cov pa oxygen atoms hauv sulfate ion (SO42-) tau hloov los ntawm hydrogen atom, thiab pab pawg no tau sib koom ua ke rau sodium cation (Na +).
Nyob rau hauv cov nqe lus ntawm nws cov kev npaj, nws muaj peev xwm yuav synthesized los ntawm ntau yam tshuaj tiv thaiv, xws li cov oxidation ntawm methane thiol (CH3SH) nrog tsim nyog oxidizing neeg ua hauj nyob rau hauv kev tswj tej yam kev mob. Cov txheej txheem yuav tsum tau ua tib zoo tuav vim muaj peev xwm reactivity ntawm intermediates koom nrog.
Qhov sib xyaw no pom muaj txiaj ntsig hauv ntau qhov chaw lag luam thiab kev tshawb fawb. Ib qho ntawm nws cov ntawv thov tseem ceeb yog ua tus neeg sawv cev txo qis hauv ntau yam tshuaj tiv thaiv, tshwj xeeb tshaj yog nyob rau hauv cov uas xav tau kev txo qis thiab kev xaiv. Tsis tas li ntawd, nws yog ua hauj lwm nyob rau hauv zus tau tej cov lwm yam chemicals, ua ib tug intermediate nyob rau hauv hluavtaws txoj kev ua rau ntau yam khoom.
Tsis tas li ntawd, nws lub peev xwm los tsim cov radicals ruaj khov nyob rau hauv cov xwm txheej tshwj xeeb ua rau nws muaj txiaj ntsig hauv cov kev tshawb fawb uas cuam tshuam nrog radical chemistry thiab dawb radicals. Cov kws tshawb fawb siv nws cov khoom tshwj xeeb los tshawb xyuas cov txheej txheem tshuaj tiv thaiv, kev tshawb fawb kinetic, thiab lwm yam ntawm radical{1}} cov txheej txheem kho kom haum xeeb.
Zuag qhia tag nrho, nrog nws cov qauv tshuaj tshwj xeeb thiab cov khoom, ua lub luag haujlwm tseem ceeb hauv ob qho tib si cov txheej txheem kev lag luam thiab kev tshawb fawb tshuaj lom neeg.
Organic Synthesis
Nws tuaj yeem siv los ua ke qee cov organic tebchaw. Piv txwv li, nws tuaj yeem hnov mob nrog aldehydes lossis ketones los tsim cov methylsulfonyl alkyl ethers, uas yog cov organic synthesis intermediates tseem ceeb. Tsis tas li ntawd, nws tseem tuaj yeem siv los ua ke qee cov tshuaj lom neeg lom neeg.
Raws li Chelating Agent & Precipitant
Nws muaj peev xwm tsim cov chelates ruaj khov nrog cov hlau ions, uas tso cai rau nws kom rho tawm cov hlau ions los ntawm cov tshuaj aqueous. Chelating agents txhim khu kev ruaj ntseg thiab solubility ntawm hlau ions los ntawm kev tsim ib lub nplhaib qauv nrog hlau ions, yog li yooj yim rau kev sib cais thiab rho tawm ntawm hlau ions los ntawm complex aqueous systems.
Kuj tseem siv los ua precipitant los precipitate tej yam ions los yog tebchaw. Lub luag haujlwm ntawm cov dej nag yog los ua tshuaj lom neeg nrog ions lossis cov tshuaj sib xyaw hauv cov tshuaj los tsim cov precipitate uas yog insoluble hauv dej, yog li ua tiav kev sib cais thiab purification ntawm ions.
Hauv Kev Ua Liaj Ua Teb
Xws li siv los ua cov khoom siv raw lossis cov khoom siv ntxiv rau cov tshuaj tua kab, tiv thaiv kab mob thiab kab tsuag, lossis txhawb kev loj hlob ntawm cov nroj tsuag.
Environmental Science
Vim nws qhov txo qis thiab lwm yam tshuaj lom neeg, sodium methanesulfite kuj muaj qee yam kev siv nyiaj hauv kev tshawb fawb ib puag ncig. Piv txwv li, nws tuaj yeem siv los daws qee qhov teeb meem ntawm ib puag ncig, lossis los kawm txog kev hloov pauv thiab degradation mechanisms ntawm qee yam khoom hauv ib puag ncig.
Kev Tshawb Fawb Kev Tshawb Fawb Case
Lub hom phiaj tseem ceeb ntawm txoj kev tshawb fawb no yog los tsim ib txoj hauv kev rau kev txiav txim siab ib txhij ntawm chloride (Cl-) thiab sulfate (SO42-) ions hauvsodium methanesulfinatesiv ion chromatography.
Cov ntaub ntawv & txoj kev
Kev npaj ua qauv
- Cov qauv no tau npaj nrog kev paub txog cov ntsiab lus ntawm Cl- thiab SO42- ions.
- Cov qauv no tau npaj raws li kev tswj xyuas kom muaj tseeb thiab rov tsim dua tshiab.
Tswv yim
- Ion chromatography system nruab nrog lub ntsuas hluav taws xob tiv thaiv hluav taws xob tau siv.
- Lub kaw lus tau calibrated siv cov qauv kev daws teeb meem ntawm Cl- thiab SO42- ions.
Cov xwm txheej Chromatographic
- Tsim nyog chromatographic tej yam kev mob, xws li mobile theem muaj pes tsawg leeg, txaus tus nqi, thiab kem kub, tau optimized los xyuas kom meej kev sib cais thiab nrhiav tau ntawm Cl- thiab SO42- ions.
Kev txheeb xyuas cov ntaub ntawv
- Qhov chaw siab tshaj plaws ntawm Cl- thiab SO42- ions tau ntsuas thiab muab piv nrog qhov ntsuas qhov nkhaus kom txiav txim siab lawv cov concentration hauv cov qauv.
- Tus nqi rov qab thiab tus qauv sib txawv (RSDs) raug xam los ntsuas qhov tseeb thiab qhov tseeb ntawm txoj kev.
Cov txiaj ntsig
Calibration Curve
- Lub calibration nkhaus rau Cl- yog linear nyob rau hauv thaj tsam ntawm 0.2 ~ 25 mg/L nrog ib tug correlation coefficient (r) ntawm 0.9999.
- Lub calibration nkhaus rau SO42- yog linear nyob rau hauv ntau ntawm 0.1 ~ 10 mg / L nrog ib tug r ntawm 0.9996.
Rov qab thiab Precision
- Qhov nruab nrab rov qab ntawm Cl- yog 102% nrog RSD ntawm 0.36%.
- Qhov nruab nrab rov qab ntawm SO42- yog 101% nrog RSD ntawm 0.61%.
Kev kuaj pom txwv
- Kev kuaj pom qhov txwv rau Cl- thiab SO42- yog 0.011 mg/L thiab 0.014 mg/L, raws li.
Cov kev tshawb fawb sim ua tiav ib txoj hauv kev rau kev txiav txim siab ib txhij ntawm Cl- thiab SO42- ions hauvsodium methanesulfinatesiv ion chromatography. Cov txheej txheem tau nthuav tawm cov kab tawm zoo, tsis tshua pom kev txwv, thiab qhov tseeb thiab qhov tseeb. Cov txiaj ntsig tau los ntawm txoj kev tshawb fawb no yog kev ntseeg siab thiab tuaj yeem siv rau kev tswj xyuas zoo hauv kev tsim khoom thiab kev tshuaj xyuas.
Txoj kev tsim muaj peev xwm siv tau hauv ntau qhov kev lag luam uas nws siv, xws li tshuaj, dyes, polymers, thiab kev lag luam khoom noj. Los ntawm kev txiav txim siab qhov tseeb ntawm Cl- thiab SO42- ions hauv nws, cov tuam ntxhab tuaj yeem ua kom zoo thiab sib xws ntawm lawv cov khoom.
Hauv kev xaus, qhov kev sim tshawb fawb tau pom qhov ua tau ntawm kev siv ion chromatography rau kev txiav txim siab ib txhij ntawm Cl- thiab SO42- ions. Cov txheej txheem tsim yog txhim khu kev qha, raug, thiab meej, thiab muaj peev xwm siv tau hauv ntau yam lag luam.
Sodium methanesulfonate (CAS naj npawb 20277-69-4) yog ib qho tseem ceeb organic synthesis intermediate dav siv nyob rau hauv cov tshuaj, tshuaj tua kab, dyes, thiab cov khoom siv. Cov txheej txheem tseem ceeb ntawm kev sib txuas yog nyob ib ncig ntawm kev taw qhia thiab kev hloov pauv ntawm sulfonic acid pawg, ua ke nrog cov kev xav tau ntawm kev tsim khoom thiab kev tshawb fawb hauv chav kuaj, feem ntau tsim peb txoj hauv kev hauv qab no:
Sodium metabisulfite txoj kev: nqi optimization thiab txheej txheem innovation
Txoj kev sodium metabisulfite tam sim no yog cov txheej txheem tseem ceeb hauv kev tsim khoom, uas siv methane sulfonyl chloride thiab sodium metabisulfite ua cov ntaub ntawv raw los ua kom muaj txiaj ntsig zoo qhia sulfonic acid pawg los ntawm nucleophilic hloov cov tshuaj tiv thaiv. Cov txheej txheem tshwj xeeb yog raws li hauv qab no:
Nyob rau hauv ib tug nitrogen tiv thaiv plaub necked hwj, ntxiv 326 grams ntawm 35% (qhov loj feem) sodium metabisulfite tov, do thiab cua sov rau 60-65 degree. Sodium metabisulfite decomposes ntawm qhov kub no los tsim bisulfite ions, muab cov chaw nquag rau cov kev tshwm sim tom ntej.
Maj mam ntxiv 90.6 grams methane sulfonyl chloride dropwise thiab tuav me ntsis reflux ntawm cov tshuaj tiv thaiv. Thaum lub sij hawm cov txheej txheem tshuaj tiv thaiv, bisulfite ions tawm tsam cov sulfur atom ntawm methane sulfonyl chloride, ua rau nucleophilic hloov cov tshuaj tiv thaiv thiab tsim cov sulfonic acid ntsev. Los ntawm kev siv cov tshuaj sodium hydroxide los kho tus nqi pH tiag tiag - lub sijhawm nyob rau hauv thaj tsam ntawm 8-9, nws tsis tsuas yog tiv thaiv oxidation ntau dhau ntawm bisulfite ions rau sulfate ions, tab sis kuj zam hydrolysis ntawm methane sulfonyl chloride los tsim methanesulfonic acid.
Tom qab cov tshuaj tiv thaiv tiav, ntxiv 50% (feem ntau pawg) calcium chloride tov kom tag nrho cov calcium sulfate calcium sulfite generated. Tom qab kev pom, cov tshuaj tsis muaj xim thiab pob tshab sulfonation tau txais, uas yog tom qab ntawd ua kom muaj zog nyob rau hauv kev txo qis lub cev qhuav dej kom txog rau thaum cov pob zeb dawb precipitate. Tom qab txias, anhydrous ethanol tau ntxiv, thiab sodium chloride tau sib cais los ntawm kev sib txawv solubility. Thaum kawg, siab -purity sodium methanesulfonate tau txais los ntawm recrystallization thiab ziab.
Technical zoo:
Tus nqi zoo:
Tus nqi ntawm sodium metabisulfite yog piv rau sodium sulfite, tab sis 1 mole ntawm sodium metabisulfite tuaj yeem muab 2 moles ntawm hydrogen sulfite ions, nce kev siv raw khoom los ntawm 50%;
Solubility optimization:
Solubility ntawm sodium metabisulfite yog ob zaug ntawm sodium bisulfite, txo cov dej hnyav thiab ua kom cov khoom muaj peev xwm ntau dua 30%;
Txheej txheem simplification:
Omitting ntau -kauj ruam nruab nrab thiab concentration cov kauj ruam hauv cov txheej txheem ib txwm ua kom luv lub voj voog ntau lawm.
Cov ntaub ntawv thov:
Ib lub tuam txhab tshuaj lom neeg tau txais cov txheej txheem no kom ua tiav txhua xyoo ntawm 500 tons ntawm sodium methanesulfonate, nrog rau cov khoom purity ntawm 99.2% thiab kev txo nqi ntawm 18% piv rau cov txheej txheem ib txwm muaj. Nws yog dav siv nyob rau hauv lub synthesis ntawm zoxamide (ib qho tshuaj antiepileptic) thiab Disperse Orange 29 (dye intermediate).
Sodium sulfite ncaj qha txoj kev: tshawb nrhiav kev txhim kho cov txheej txheem classic
Txoj kev siv sodium sulfite ncaj qha siv sodium sulfite thiab methane sulfonyl chloride ua raw khoom los ua ke sodium methane sulfite los ntawm kev hloov pauv nucleophilic mechanism. Cov txheej txheem zoo ib yam li cov txheej txheem sodium metabisulfite, tab sis cov kev mob tshwm sim yuav tsum tau ua kom zoo kom kov yeej lub fwj ntawm cov dej tsis muaj sodium sulfite.
Siv cov dej ethanol sib xyaw cov kuab tshuaj (ntim piv 3: 1), solubility ntawm sodium sulfite tau nce mus rau 15% (feem ntau), uas yog peb npaug ntau dua li cov dej ntshiab. Cov tshuaj tiv thaiv kub yog tswj ntawm 70-75℃los txhawb kev sib tsoo zaus ntawm sulfite ions thiab methane sulfonyl chloride.
Faib methane sulfonyl chloride rau hauv peb pawg thiab ntxiv rau lawv dropwise, nrog rau 15 feeb ncua sij hawm ntawm txhua batch, kom tsis txhob muaj kev phiv tshwm sim los ntawm ntau lub zos concentration. Qhov kawg ntawm cov tshuaj tiv thaiv yog saib xyuas los ntawm cov roj chromatography kom ntseeg tau tias qhov kev hloov pauv ntau dua lossis sib npaug li 98% rau cov seem methane sulfonyl chloride.
Taw qhia ultrasonic pab crystallization tshuab, thov 20kHz ultrasonic tsis nyob rau hauv cov concentrated tov kom cov siv lead ua particle loj faib ntau yam (D50=45 μ m) thiab txo lub sij hawm pom los ntawm 40%.
Kev nyuaj siab:
Solvent rov qab nqi:
Ethanol yuav tsum tau rov qab los ntawm distillation, nrog rau kev siv hluav taws xob suav txog 12% ntawm cov nqi tsim khoom;
Los ntawm kev tswj cov khoom:
Methanesulfonic acid yog yooj yim tsim nyob rau hauv high kub (yield tsawg tshaj li los yog sib npaug rau 2%), uas yuav tsum tau suppressed los ntawm tiag tiag - sij hawm pH kev cai.
Siv tau scenarios:
Tsim nyog rau me me - lab npaj los yog siab - cov khoom kawg rhiab rau impurities (xws li tshuaj qib sodium methanesulfonate, purity Ntau dua los yog sib npaug rau 99.5%).
Txoj Kev Redox: Txoj Kev Tshaj Tawm hauv Green Chemistry
oxidation -txo txoj kev tswj lub xeev valence ntawm sulfur ntsiab lus los ntawm oxidation los yog txo cov tshuaj tiv thaiv, muab ib tug ntsuab lwm txoj rau cov synthesis ntawmsodium methanesulfinate.
Siv methyl mercaptan (CH3SH) ua raw khoom, nws reacts nrog oxygen nyob rau hauv qhov kev txiav txim ntawm ib tug catalyst (xws li vanadium raws li oxide) los tsim sodium methanesulfonate. Cov kev mob tshwm sim yog 120℃thiab 2.5MPa, nrog rau kev xaiv ntawm 92%. Cov ntaub ntawv raw rau txoj kev no tau yooj yim muaj (methyl mercaptan yog cov khoom lag luam ntawm petrochemicals), tab sis qhov teeb meem ntawm catalyst deactivation yuav tsum tau hais txog (lub neej luv dua lossis sib npaug li 500 teev).
Dimethyl disulfide ((CH3) 2S2) raug xaiv txo kom tsim sodium methanesulfonate ntawm 80℃thiab 1.5MPa nyob rau hauv qhov kev txiav txim ntawm hydrogen thiab palladium carbon catalyst, nrog ib tug yield ntawm 85%. Txoj kev no muaj kev siv atomic siab (100%), tab sis muaj kev pheej hmoo ntawm kev nyab xeeb cuam tshuam nrog kev thauj mus los hydrogen thiab khaws cia.
Technological prospects:
oxidation -txo txoj kev ua raws li cov qauv ntawm ntsuab chemistry (atomic kev lag luam Loj dua lossis sib npaug li 90%), tab sis nws cov ntawv thov kev lag luam tseem raug txwv los ntawm tus nqi catalyst (vanadium raws li tus nqi catalyst ntau dua lossis sib npaug rau 5000 yuan / kg) thiab cov tshuaj tiv thaiv hnyav. Nrog rau txoj kev loj hlob ntawm nanocatalysts thiab nruam ntws reactor thev naus laus zis, txoj hauv kev no yuav tsum ua kom tiav loj - nplai ntau lawm ua ntej 2030.
FAQ
Dab tsi yog sodium hydroxymethanesulfinate siv rau?
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Sodium hydroxymethanesulfinate yog sivRaws li ib tug reagent nyob rau hauv lub synthesis ntawm cov organic tebchaw, raws li ib tug catalyst nyob rau hauv cov tshuaj tiv thaiv, thiab raws li ib tug preservative thiab bleaching neeg sawv cev. Sodium hydroxymethanesulfinate kuj tseem siv rau hauv kev tsim khoom noj thiab dej haus, nrog rau hauv kev lag luam tshuaj.
Dab tsi yog sodium ntsev ntawm methanesulfonic acid?
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Sodium methanesulfonate| CH3NaO3S|CID 638112 - PubChem.
Puas yog sodium cumenesulfonate muaj kev nyab xeeb?
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Cov tshuaj no tau raug txheeb xyuas tias yog ntawmKev txhawj xeeb tsawg hauv cov khoom siv turaws li cov ntaub ntawv sim thiab ua qauv raws li kev soj ntsuam los ntawm EPA.
Lwm lub npe rau sodium heptanesulfonate yog dab tsi?
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Synonyms:1-Heptanesulfonic AcidSodium ntsev. Heptylsulfonic Acid Sodium ntsev.
Cim npe nrov: sodium methanesulfinate cas 20277-69-4, lwm tus neeg, manufacturers, hoobkas, lag luam wholesale, yuav, nqe, tej, kev muag khoom