Sodium cyanoborohydride, tseem hu ua Nabh3cn, yog cov organic ntau ntau nrog tus lej ntawm 25895-60-7. Nws cov mis molecular yog ch2bnna lossis feem ntau sau ua Nabh3cn, thiab nws muaj cov molecular hnyav ntawm kwv yees li 62. {}. 85 g / mol. Cov xim dawb lossis me ntsis daj cov hmoov tawv tau pom tias yog tus neeg sawv cev maj mam thiab xaiv tus neeg sawv cev rau cov organic.
Nws yog soluble nyob rau hauv dej thiab ntau yam kuab tshuaj organic xws li Methanol, ethanol, tetrahydrofuran (thf), thiab acetic acid. Nws cov solubility hauv dej ntawm 29 qib yog 2120 g / l, thiab nws ua yeeb yam sib txuas nrog kub (piv txwv li 46 degree, 422 g / l ntawm 62 degree). It is also soluble in diethylene glycol dimethyl ether but is only slightly soluble in ethanol and insoluble in ethers, benzene, and hexane.
Nws yog ruaj khov nyob rau hauv cov kev daws teeb meem nrog lub pH ntawm ib ncig ntawm 3 tab sis tuaj yeem decompose thaum rhuab, nrog melting point ntau ntawm {1} degree (dog dig). Nws yog hygroscopic thiab yuav tsum tau muab cia rau hauv cov xwm txheej qhuav, nyiam dua nyob rau hauv cov inert inert such suchS xws li argon.
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Tshuaj Cov Qauv |
CH3bnna |
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Muaj pes tsawg leej |
63.03 |
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Molecular hnyav |
62.84 |
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m/z |
63.03 (100.0%), 62.03 (24.8%), 64.03 (1.1%) |
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Kev Ntsuam Xyuas |
C, 19.11; H, 4.81; B, 17.20; N, 22.29; Na, 36.58 |
Kev npaj ntawmSodium Cyanoborohydrid:
Raws li cov ntaub ntawv sib txawv uas siv, cov qauv hluavtaws ntawm Nabh4 tuaj yeem faib ua plaub pawg:
(1) Borane lossis organic boron li cov khoom nyoos;
(2) Boron trihalide thiab sodium tetrafruoroborate yog siv raws li cov ntaub ntawv raw;
(3) lorate ester li cov khoom siv raw;
(4) Cov ntaub ntawv raw yog Boron oxide, boron phosphate thiab borate.
Cov txheej txheem feem ntau yogSodium CyanoborohydridTxoj Kev: Ntxiv boric acid thiab ib qho txiaj ntsig ntawm Methanol mus rau hauv lub lauj kaub distillation, maj mam ua kom sov ntawm 54 degree rau ntawm methyl bortate thiab methanol. Tom qab lub azeotrope yog kho nrog sulfuric acid thiab rectified, ib cov khoom ntshiab tuaj yeem tau txais. Cov khoom plig sodium los ntawm cov tshuaj tiv thaiv ntawm hydrogen thiab sodium yog xa mus rau hauv cov kev sib tsoo hauv lub taub hau, thiab cov cua sov nres thaum nws mus txog 260 degree. Kev pub mis txias yuav tswj hwm qis dua 280 degree. Tom qab pub mis, txuas ntxiv sib xyaw kom nws ua kom dhau los. Tom qab cov tshuaj tiv thaiv tiav, nws txias rau hauv qab 100 degree thiab centrifuged kom tau lub lim ncuav mog qab zib ntawm cov khoom hws hws. Ntxiv cov dej uas tsim nyog rau hauv hydrolyser, maj mam ntxiv cov lim ncuav mog qab zib rau hauv hydrolyzate mus rau hauv cov txheej txheem pub dawb, thiab cia li cia li txheej tom qab sawv rau 1h. Lub hydrolyzate ntawm cov txheej qis yog sodium borohydride. Cov tshuaj tiv thaiv cov tshuaj muaj raws li hauv qab no:
Nco tseg: Hydrocyanic acid yog siv rau qhov kev npaj no, thiab cov tshuaj tiv thaiv ntawm kev daws teeb meem yuav tsum tau nqa tawm hauv lub suab zoo.
Nruab ib qho kev nqus dej tas li, lub tshuab ua hlau thiab lub tshuab hluav taws xob tiv thaiv kom huv thiab qhuav 2L peb lub chaw nres nkoj flask. Qhov hluav taws xob ntawm cov condenser txuas nrog lub tshuab ntxuav hydrocasanic acid
Ntxiv 1000mL TetrahyDrofuran (qhuav nrog CAH2 ua ntej thiab lim ua ntej siv) thiab 80.2G (2.09 ntawm sidium borohydride rau hauv lub hwj. Ntxuav lub flask nrog qhuav nitrogen. Lub caij nplooj zeeg funnel muaj 16.7% (qhov hnyav piv) tov ntawm hydrocyanic acid tetrahydrofuran (294g, muaj 5,33mol 98% hydrocyanic acid). Cov kab ke no tsuas yog ntxuav dua. Maj mam ntxiv cov hydrocyanic acid daws rau cov sodium borohydride slurry ntawm chav sov kom tso hydrogen maj mam thiab tam sim ntawd.
Raws li cov tshuaj tiv thaiv yog ib qho me ntsis exothermic, cov flask khaws cia ntawm 25 degree los ntawm txias txias hauv dej da dej. Tom qab nplawm rau 1h, qhov sib tov yog maj mam muab rhaub kom txog thaum cov hydrogen yog tso tawm. Tom qab cov tshuaj tiv thaiv kab sib xyaw yog txias rau kev txom dej txias, ntxuav nws nrog nitrogen pheej pheej rov qab thiab tom qab khiav tawm mus. Ib qho me me ntawm insolubble cov khib nyiab yuav tsum lim nrog lim ntawv lined nrog ua kom cov roj carbon. Mloog zoo thiab qhuav lub pob tshab lub teeb daj daj hauv lub tshuab nqus teb teb evaporator. Ua ntej cua sov, tshem tawm txog ib nrab ntawm cov kev daws teeb meem, thiab thaum kawg qhuav nws hauv qab dawb cyanobohydride nrog cov txiaj ntsig ntawm 91%. Cov khoom yuav muaj b (huag) 3 impurities los ntawm kev tsom xam. Dissolve cov khoom lag luam nyoos hauv TetranahyDrofuran (20% v / v), ntxiv 4 zaug ntawm ntau dua dichhloromethane, thiab recrystallize ob zaug kom tau txais cov khoom ntshiab.
Qhov ntawm Kev Muag Khoom Raws
Sodium cyanoborohydrideyog ib tug xaiv tau cov neeg sawv cev muaj kev xaiv tau ntau hauv cov organic synthesis rau kev txo cov pab pawg ua haujlwm xws li aldehydes, ketones, thiab ua kom pom. Nrog rau kev tsim kho sai ntawm lub ntiaj teb tshuaj lom neeg, tshuaj, tshuaj tua kab thiab lwm yam kev lag luam, nws cov lag luam xav tau nce ntxiv. Txhawm rau kom tau raws li cov kev xav tau ntawm cov neeg siv khoom sib txawv, kev lag luam ntau dua yuav tsum tau tsim cov khoom muag sib txawv channel:
Cov faib khoom thiab cov neeg sawv cev
Cov khoom xa tawm hauv cheeb tsam hauv cheeb tsam
Cov neeg xa khoom hauv cheeb tsam yog lub zog tseem ceeb hauv kev muag khoom ntawm cov tshuaj no. Lawv feem ntau muaj cov neeg siv khoom dav dav network thiab muag raws cov cheeb tsam tshwj xeeb, uas tuaj yeem sai sai npog lub chaw ua lag luam hauv zos. Los ntawm kev koom tes nrog cov neeg xa khoom hauv cheeb tsam, kev lag luam tuaj yeem rub tawm lawv cov channel zoo nthuav lawv cov lag luam sib koom. Cov neeg xa khoom hauv cheeb tsam yog lub luag haujlwm rau cov khoom lag luam, muag khoom, thaum muaj kev lag luam, kev txhawb nqa khoom, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev ua lag luam kev txhawb nqa, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev ua lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev ua lag luam kev txhawb nqa, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev txhawb nqa kev lag luam, thiab kev ua lag luam nce qib.
Cov neeg ua hauj lwm kev lag luam
Txog kev lag luam tshwj xeeb xws li tshuaj tua tshuaj, tshuaj tua kab, zas, thiab lwm yam, cov tuam txhab yuav xaiv cov neeg sawv cev nrog kev koom tes thiab cov peev txheej rau kev koom tes. Kev lag luam cov neeg sawv cev yog paub txog kev lag luam qauv thiab cov neeg siv khoom xav tau, thiab tuaj yeem muab cov tswv yim kev lag luam thiab kev lag luam kev lag luam rau cov lag luam. Los ntawm kev sib koom tes nrog cov neeg sawv cev kev lag luam, cov tuam txhab tuaj yeem nkag mus rau lawv cov phiaj xwm ntau dua, nce kev paub txog cov khoom lag luam thiab sib koom ua lag luam.
Cov neeg sawv cev thoob ntiaj teb
Rau export lag luam, kev lag luam yuav xaiv cov neeg sawv cev thoob ntiaj teb nrog kev ua lag luam hauv kev lag luam thiab network. Cov neeg sawv cev thoob ntiaj teb muaj lub luag haujlwm txhawb nqa, muag, thiab kev pabcuam tom qab muag rau cov khoom lag luam, thiab ntawv pab ua tau raws li cov qauv kev thoob ntiaj teb. Los ntawm kev sib koom tes nrog cov neeg sawv cev thoob ntiaj teb, cov tuam txhab tuaj yeem txo cov kev pheej hmoo thoob ntiaj teb thiab nkag mus rau hauv kev ua lag luam thoob ntiaj teb.
Kev lag luam kev nthuav dav thiab cov rooj sib tham tshaj lij
Kev Lag Luam Kev Lag Luam
Kev lag luam hauv tsev (xws li Tuam Tshoj Troman Choj Kev Lag Luam Kev Lag Luam / Interiaiates Raw Khoom / Intermediates Tshuaj, thiab lwm yam) yog cov ntaub ntawv tseem ceeb rausodium cyanoborohydrideCov lag luam ntau lawm los qhia txog lawv cov khoom lag luam thiab nthuav lawv cov lag luam. Cov lag luam tuaj yeem ua yeeb yam lawv cov khoom lag luam tshiab thiab cov thev naus laus zis los ntawm cov neeg siv khoom, thiab nkag siab cov kev lag luam thiab cov qauv kev lag luam. Thaum lub sijhawm ua yeeb yam, cov tuam txhab tseem tuaj yeem tuav cov tswv yim kev kawm, cov khoom lag luam tawm, thiab lwm yam kev ua kom txhim kho lawv cov khoom siv hom.
Kev Lag Luam Kev Lag Luam Thoob Ntiaj Teb
Kev lag luam kev lag luam thoob ntiaj teb, xws li European International Tshuaj Yeeb Yam Khoom Siv thiab Asmeskas Kev Ua Haujlwm Thoob Ntiaj Teb Kev Lag Luam los nthuav mus rau cov lag luam thoob ntiaj teb. Los ntawm kev koom nrog kev nthuav tawm, cov tuam txhab tuaj yeem ntsib kev sib txuas lus nrog cov neeg yuav khoom hauv ntiaj teb thiab nkag siab cov kev xav tau thiab tiam ntawm kev lag luam thoob ntiaj teb. Kev nthuav qhia thoob ntiaj teb kuj pab cov tuam txhab tsim cov duab thoob ntiaj teb thiab nce qhov pom ntawm lawv cov khoom hauv kev ua lag luam thoob ntiaj teb.
Cov Rooj Sib Tham Txuj Ci thiab Seminars
Cov kev sib tham txog kev tshaj lij thiab rooj qhia (xws li cov kws ua haujlwm hauv koos pij tawj ntawm cov neeg ua haujlwm sib tham, thiab lwm yam kev tshawb fawb, cov tsev kawm qib siab, thiab cov kws tshaj lij. Kev lag luam tau koom nrog hauv lub rooj sib tham kom paub txog kev tshawb fawb thiab tsim kev sib raug zoo nrog cov kws tshaj lij thiab kws tshawb fawb. Thaum lub rooj sib tham, cov tuam txhab tseem tuaj yeem tuav cov lus qhuab qhia kev ua haujlwm, cov khoom lag luam tsim khoom, thiab lwm yam kev ua haujlwm los txhim kho lawv cov kev lag luam thev naus laus zis hauv kev lag luam.
Kev lag luam thoob ntiaj teb
Kev Luam Tawm Tawm
Sodium Cyanoborohydride cov lag luam tsim khoom muag lawv cov khoom rau kev ua lag luam thoob ntiaj teb los ntawm kev lag luam export. Kev lag luam yuav tsum muaj export tsim nyog thiab nkag siab cov cai ntshuam, cov cai, thiab cov qauv ntawm lub hom phiaj lub teb chaws. Kev lag luam xa tawm tuaj yeem ua los ntawm kev lag luam dav dav, kev ua lag luam, sib raug zoo thaj chaw ua lag luam, thiab lwm txoj hauv kev. Kev lag luam yuav tsum koom tes nrog cov tuam txhab lag luam thoob ntiaj teb, thiab lwm yam. Txhawm rau kom tiav cov kev tshaj tawm, tshuaj xyuas thiab lwm yam txheej txheem.
Hla ciam teb e-lag luam
Hla ciam teb e-lag luam muab tuam txhab uas tau txais kev muag khoom ncaj qha rau cov neeg siv khoom txawv teb chaws. Cov lag luam tuaj yeem qhib cov khw muag khoom noj ntawm Cross-Commerce Statms xws li Amazon thiab eBay muag cov khoom noj sodium cyanoborohydride. Hla ciam teb e-lag luam muaj qhov zoo ntawm kev hloov kho yooj yim, cov nqi tiv thaiv dav, thiab cov nqi qis, uas pab ua lag luam sailet ceev nkag mus rau hauv kev ua lag luam thoob ntiaj teb. Txawm li cas los xij, hla ciam teb e-kev ua lag luam kuj tseem ntsib txoj kev sib tw, kev them nyiaj, thiab kev lag luam yuav tsum muaj kev tswj hwm kev ua haujlwm thiab kev pheej hmoo ua haujlwm.
Kev koom tes thoob ntiaj teb thiab sib koom ua ke
Cov lag luam tuaj yeem ua ke tshawb nrhiav thoob ntiaj teb cov lag luam los ntawm kev koom tes lossis kev sib koom tes nrog cov tuam txhab thoob ntiaj teb. Kev koom tes thoob ntiaj teb muaj xws li ntau hom ntawv xws li thev naus laus zis, kev sib koom tes ua lag luam, thiab kev koom tes ntau lawm. Los ntawm kev koom tes, cov tuam txhab tuaj yeem siv cov lag luam, channel, thiab thev naus laus zis kev lag luam hauv kev sib tw hauv kev ua lag luam thoob ntiaj teb. Kev ua haujlwm sib koom ua ke tuaj yeem nqis peev pab, ua haujlwm, thiab qhia cov txiaj ntsig kom tau txais txiaj ntsig zoo thiab yeej cov txiaj ntsig yeej.
Cim npe nrov: Sodium Cyanoborohydrid li kev sib xyaw ua ke 25895-60-7, cov chaw muag khoom, chaw tsim khoom, chaw lag luam, yuav, nqe, loj, rau muag