Sodium borohydride, ntau yam txo tus neeg sawv cev tau siv dav hauv ntau daim ntawv thov kev lag luam, nthuav tawm cov yam ntxwv zoo rau kev solubility uas yog qhov tseem ceeb rau nws txoj kev siv tau zoo. Solubility ntawmsodium borohydride uaNws txawv heev nyob ntawm qhov hnyav thiab ib puag ncig. Hauv cov tshuaj aqueous, sodium borohydride qhia txog kev solubility me ntsis, nrog kwv yees li 55 grams yaj hauv 100 mL dej ntawm chav tsev kub. Qhov no solubility nce nrog kub, ncav cuag li 88 grams ib 100 mL ntawm 60 degree. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias sodium borohydride ua rau hydrolysis hauv dej, tso cov roj hydrogen thiab tsim sodium metaborate. Cov tshuaj tiv thaiv no yog pH-nyob ntawm thiab tuaj yeem ua rau qeeb hauv alkaline. Kev nkag siab txog cov khoom solubility no yog qhov tseem ceeb rau kev lag luam xws li kws tshuaj, polymers, thiab cov tshuaj tshwj xeeb, qhov kev tswj xyuas meej ntawm sodium borohydride tus cwj pwm hauv kev daws yog feem ntau xav tau rau kev ua haujlwm zoo hauv kev sib xyaw thiab txo cov txheej txheem.
Peb muab Sodium borohydride, thov xa mus rau lub vev xaib hauv qab no kom paub meej cov lus qhia thiab cov ntaub ntawv khoom.
Puas yog sodium borohydride soluble hauv dej?
Sodium borohydride solubility hauv dej yog lub ntsiab lus tseem ceeb ntawm kev txaus siab vim nws siv dav hauv ntau cov txheej txheem kev lag luam. Lub compound nthuav tawm me ntsis solubility nyob rau hauv aqueous daws, tab sis nws tus cwj pwm yog complex thiab cuam tshuam los ntawm ntau yam.
Sodium borohydride hmoovsolubility ntawm chav tsev kub (25 degree) yog kwv yees li 55 grams ib 100 mL dej. Nrog kub, nws solubility nce; ntawm 60 degree, nws nce mus txog 88 grams ib 100 mL. Txij li thaum cov txheej txheem dissolution yog exothermic-uas yog, generates tshav kub-cov tshuaj dissolves tso cua sov. Muaj kev siv qhov twg tswj kev sib cais yuav tsum nyob ntawm qhov ntsuas kub no. Sodium borohydride tsis, txawm li cas los xij, nyob ruaj khov tsis tu ncua thaum nws yaj hauv dej.
Cov tshuaj hydroly, cov tshuaj tiv thaiv nrog dej molecules tsim sodium metaborate thiab hydrogen gas. Ib qho tuaj yeem qhia qhov kev tshwm sim no los ntawm kev sib npaug hauv qab no: NaBH4 + 2H2O → NaBO2 + 4H2. Tus nqi ntawm cov tshuaj tiv thaiv hydrolysis no yog nyob ntawm pH, nrog rau cov kab mob alkaline ua rau cov txheej txheem qeeb qeeb. Qhov no yog vim li cas cov tshuaj sodium borohydride feem ntau ruaj khov nrog sodium hydroxide rau kev khaws cia thiab tuav lub hom phiaj.
Cov kev cuam tshuam ntawm cov dej solubility
Sodium borohydride daim ntawv thov kev lag luam yog cuam tshuam los ntawm nws cov dej solubility. Piv txwv li, lub solubility ntawm cov tshuaj yog ib qho tseem ceeb nyob rau hauv lub kws sector rau nws siv nyob rau hauv lub tsim ntawm tej yam pharmacological intermediates. Cov txheej txheem homogeneous ua tau los ntawm sodium borohydride dissolution hauv dej tuaj yeem ua tau zoo dua thiab yooj yim rau kev tswj hwm ntau dua li cov txheej txheem heterogeneous. Sodium borohydride cov dej solubility yog qhov tseem ceeb rau cov khoom siv polymer thiab plastics hauv kev ua haujlwm nrog rau kev txo qis ntawm carbonyl pawg hauv cov saw hlau polymer.
Lub solubility ntawm lub molecule guarantees nws txawm tis tshaj cov tshuaj tiv thaiv tawm, yog li guaranteeing zoo ib yam txo cov khoom. Raws li tus neeg sawv cev txo qis rau kev tshem tawm cov hlau hnyav thiab lwm yam khoom paug, sodium borohydride solubility yog qhov tseem ceeb hauv kev kho dej. Qhov sib xyaw ua ke muaj peev xwm yaj thiab tawg sib npaug hauv dej pab nws kom muaj kev cuam tshuam zoo nrog cov kab mob sib kis.
Cov kuab tshuaj dab tsi tuaj yeem yaj sodium borohydride zoo?
Thaum dej yog ib qho hnyav hnyav rausodium borohydride ua, ntau lwm cov kuab tshuaj kuj tseem tuaj yeem ua rau cov tshuaj no zoo. Kev xaiv cov kuab tshuaj tuaj yeem cuam tshuam rau kev ruaj ntseg, rov ua haujlwm, thiab tuav cov tshuaj sodium borohydride, ua rau nws yog ib qho tseem ceeb rau kev siv hauv kev lag luam.
Polar aprotic cov kuab tshuaj muaj txiaj ntsig tshwj xeeb ntawm kev so sodium borohydride thaum txo qis cov kev xav tsis zoo. Cov kuab tshuaj no tsis muaj acidic hydrogen atoms, uas txo tus nqi ntawm hydrolysis piv rau cov kuab tshuaj protic xws li dej.
Polar aprotic kuab tshuaj
Ntawm cov teeb meem tseem ceeb yog:
1.
DMSO, los yog dimethyl sulfoxide, Sodium borohydride pom zoo solubility thiab stability los ntawm DMSO, ib qho hnyav hnyav. Vim nws txoj kev txo hwj chim thiab kev ruaj ntseg, sodium borohydride cov kev daws teeb meem hauv DMSO tau siv ntau dua hauv cov tshuaj synthesis.
2.
Feem ntau ua haujlwm hauv ntau cov txheej txheem txo qis thiab muaj kev ua haujlwm zoo rau sodium borohydride, N, N-dimethylformamide (DMF) kuj Feem ntau hais lus, sodium borohydride qhov ruaj khov hauv DMF yog qhov zoo dua li hauv cov tshuaj aqueous.
3.
Txawm hais tias tsawg dua polar dua DMSO lossis DMF, tetrahydrofuran (THF) tuaj yeem ua kom yaj sodium borohydride zoo dua. Nws yog tshwj xeeb tshaj yog pab tau nyob rau hauv cov tshuaj tiv thaiv uas yuav tsum tau yooj yim tshem tawm cov kuab tshuaj los yog thaum uas qis polarity yog nrhiav.
Cawv thiab ethers
Txawm hais tias muaj qee qhov kev txwv, ntau yam cawv thiab ethers tuaj yeem ua kuab tshuaj rau sodium borohydride:
1.
Txawm hais tias cov kev daws teeb meem tsis ruaj khov dua li cov hauv cov kuab tshuaj aprotic vim muaj kev cuam tshuam qeeb ntawm cov cawv thiab cov borohydride, cov cawv qis no tuaj yeem yaj sodium borohydride.
2.
Qee lub sij hawm ua hauj lwm hauv cov ntawv tshwj xeeb vim tias nws qhov kub kub thiab kev ruaj ntseg, diglyme (diethylene glycol dimethyl ether) tuaj yeem ua kom zoo dua sodium borohydride.
3.
Txawm hais tias tsis yog cov kuab tshuaj rau lawv tus kheej, los ntawm kev ua kom cov sodium ion complex, crown ethers tuaj yeem txhim kho cov solubility ntawm sodium borohydride hauv cov organic solvues. Hauv cov tshuaj tsis-polar synthesis tshwj xeeb, qhov no tuaj yeem pab tau zoo.
Hauv cov haujlwm xws li cov tshuaj tshwj xeeb thiab tshuaj, qhov kev tswj xyuas meej ntawm kev txo qis yog qhov tseem ceeb, cov kuab tshuaj siv rau sodium borohydride yog qhov tsim nyog kiag li. Rau cov synthesis ntawm cov tshuaj intermediates nyuaj, piv txwv li, qhov kev xaiv hnyav tuaj yeem cuam tshuam cov tshuaj tiv thaiv nrawm, kev xaiv, thiab cov txiaj ntsig dav dav. Nyob rau hauv kev tsim cov ntaub ntawv sophisticated rau lub lag luam polymer, ib yam nkaus, cov kuab tshuaj yuav cuam tshuam rau homogeneity thiab efficiency ntawm kev txo cov txheej txheem.
Yam dab tsi cuam tshuam rau kev solubility ntawm sodium borohydride hauv cov kev daws teeb meem sib txawv?
Solubility ntawmsodium borohydride uayog cuam tshuam los ntawm ntau yam, txhua tus ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws tus cwj pwm hauv kev daws teeb meem. Kev nkag siab txog cov xwm txheej no yog qhov tseem ceeb rau kev txhim kho nws txoj kev siv thoob plaws cov ntawv thov kev lag luam sib txawv.
Kub cuam tshuam rau solubility
Kub muaj qhov cuam tshuam loj rau kev solubility ntawm sodium borohydride:
1
Sodium borohydride qhia tau hais tias nce solubility hauv cov kuab tshuaj feem ntau ntawm qhov kub siab dua.
2
Hauv kev lag luam kev lag luam uas muaj qhov kub thiab txias tau ua hauj lwm los txhim kho cov nqi yaj lossis cov tshuaj tiv thaiv kinetics, qhov no yog qhov tseem ceeb heev.
3
Solubility nkhaus: Solubility sib txawv nrog qhov kub thiab txias tsis tas li ib txoj kab. Txoj kev ua kom zoo dua yog nyob ntawm kev paub txog qhov tseeb ntawm kev sib xyaw ua ke rau sodium borohydride hauv ntau cov kuab tshuaj, tshwj xeeb tshaj yog nyob rau hauv cov khoom xws li cov tshuaj tshwj xeeb uas xav tau kev tswj hwm qhov concentration.
4
Yam exothermic xwm ntawm sodium borohydride dissolution yog kub ntawm kev daws. Cov xwm txheej kub hauv zos tuaj yeem cuam tshuam los ntawm qhov tso tawm cua sov no, yog li muaj peev xwm cuam tshuam cov tshuaj tiv thaiv thiab qhov sib npaug hauv kev siv hauv kev lag luam.
pH thiab ionic zog xav txog
Lub pH thiab ionic zoo ntawm kev npaj ua si qhov tseem ceeb hauv sodium borohydride qhov hnyav thiab ruaj khov:
1
Cov xwm txheej alkaline raws li txoj cai txo qis ntawm hydrolysis ntawm sodium borohydride hauv kev npaj, yog li txav mus rau nws txoj kev ruaj ntseg.
2
Vim li no, nyob rau hauv txhua yam teeb meem sodium hydroxide yog qee lub sij hawm suav nrog cov kua dej sodium borohydride kev npaj.
3
Hauv kev siv ntau yam, tshwj xeeb tshaj yog nyob rau hauv kev kho dej thiab kev lag luam tshuaj, cov tshuab tsis yog ua haujlwm los khaws pH zoo tagnrho rau sodium borohydride stability thiab reactivity.
4
Lub zog ionic: Los ntawm txoj kev los ntawm cov teebmeem ion los yog los ntawm kev hloov cov ionic lub zog ntawm cov tshuaj, muaj lwm yam ions tuaj yeem cuam tshuam cov solubility ntawm sodium borohydride.
Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv kev siv dej siv los yog hauv cov khoom sib xyaw ua ke nrog rau ntau hom yaj. Tus cwj pwm ntawm sodium borohydride hauv kev daws yog cuam tshuam los ntawm kev cuam tshuam ntawm cov ntsiab lus no, yog li cuam tshuam rau nws cov txiaj ntsig hauv ntau yam kev lag luam. Piv txwv li, nyob rau hauv cov roj thiab roj sector qhov twg sodium borohydride yog siv rau sulphide scavenging, paub txog cov solubility variables yog ib qho tseem ceeb rau maximizing kev kho mob zoo nyob rau hauv ntau yam kub thiab tshuaj muaj pes tsawg leeg tej yam kev mob.
Hauv kev xaus, solubility ntawm sodium borohydride yog ib qho cuab yeej nyuaj uas cuam tshuam los ntawm ntau yam xws li qhov hnyav, qhov kub thiab txias, pH, thiab ib puag ncig ionic. Qhov no versatility nyob rau hauv solubility yam ntxwv uasodium borohydride uaib qho khoom muaj txiaj ntsig thoob plaws ntau qhov kev lag luam, los ntawm cov tshuaj mus rau kev kho dej. Nws muaj peev xwm yaj nyob rau hauv ob qho tib si aqueous thiab cov kuab tshuaj organic, ua ke nrog nws cov khoom muaj zog txo qis, tso nws ua ib qho tseem ceeb reagent hauv ntau cov txheej txheem tshuaj. Kev nkag siab thiab tswj cov yam ntxwv solubility no yog qhov tseem ceeb rau kev ua kom zoo rau nws txoj kev siv hauv ntau hom kev siv, ua kom muaj txiaj ntsig zoo thiab siv tau zoo ntawm cov tshuaj tseem ceeb no. Yog xav paub ntxiv txog sodium borohydride thiab nws daim ntawv thov, thov hu rau peb ntawmSales@bloomtechz.com.
Cov ntaub ntawv
Johnson, RA thiab Wichern, DW (2007) "Applied Multivariate Statistical Analysis", 6th Edition, Pearson Prentice Hall, Upper Saddle River.
2. Smith, JM, Van Ness, HC, thiab Abbott, MM (2005) "Introduction to Chemical Engineering Thermodynamics", 7th Edition, McGraw-Hill, New York.
3. Lide, DR (2004) "CRC Phau Ntawv Qhia ntawm Chemistry thiab Physics", 85th Edition, CRC Xovxwm, Boca Raton.
4. Roque-Malherbe, RMA (2007) "Adsorption and Diffusion in Nanoporous Materials", CRC Xovxwm, Boca Raton.