1,3,5-Tribromobenzene CAS 626-39-1

1,3, 5-tribromobenzene,Kuj hu ua Tribromobenzene, yog ib qho organic compound nrog cov mis molecular C6H3Br3 thiab CAS 626-39-1. Nws yog lub teeb daj xim av hmoov nrog ib qho tsw ntxhiab tsw thiab yuav ua rau muaj kev tsis haum rau qee tus neeg. Insoluble hauv dej, tab sis soluble hauv qee cov organic solvents xws li kub ethanol thiab glacial acetic acid. Ruaj khov nyob rau hauv chav tsev kub, tab sis tej zaum yuav decompose thiab tshwm ua kua nyob rau hauv lub kub kub thiab lub teeb tej yam kev mob. Nws yog cov khoom siv raw rau kev tsim cov organic tebchaw xws li vitamin B6 thiab synthesizing calcium pantothenate. Ntxiv rau cov zaub mov tuaj yeem txhim kho cov txiaj ntsig ntawm cov tshuaj seasoning, txhim kho cov saj ntawm sweeteners thiab acidity ntawm cov organic acids, txhim kho cov dej cawv zoo, tiv thaiv cov roj oxidation, thiab txhim kho qhov tsw ntawm cov khoom noj khoom haus. Nws kuj tseem siv tau los ua biochemical reagent rau biochemical thiab microbiological tshawb fawb. Nws yog ib qho tseem ceeb organic synthesis raw khoom thiab nruab nrab.

Synthetic tribromobenzene: tso 100g (1.1mol) aniline, 1L dej thiab 100ml (12.mol) concentrated hydrochloric acid nyob rau hauv 15L puag ncig hauv qab khob. Thaum aniline yaj lawm, ntxiv 5L dej, thiab muab lub khob rau hauv ib da dej khov kom txias. Tom qab ntawd maj mam ntxiv 577g (185ml, 3.6mol) ntawm bromine kom txog thaum cov tshuaj muaj xim daj, uas yuav siv li 34h, thiab cov tshuaj tiv thaiv tiav. Tso tawm tribromoaniline nrog Brinell, ntxuav tawm hydrobromic acid nrog dej thiab nqus nws kom qhuav. Qhov chaw moist tribromoaniline, 2.1l95% ethanol thiab 525ml benzene nyob rau hauv 5L lub raj mis nruab nrog lub reflux condenser. Muab lub lauj kaub rau ntawm chav da dej thiab ua kom sov kom yaj tribromoaniline. Ntxiv 40ml ntawm 1chemicalbook concentrated sulfuric acid rau kev daws, thiab tom qab ntawd ntxiv 140g (2.03mol) ntawm hmoov sodium nitrite thaum tswj cov tshuaj tiv thaiv ib txwm. Thaum cov tshuaj tiv thaiv tiav lawm, cov tshuaj yog rhuab thiab boiled, thiab khaws cia nyob rau hauv lub xeev no kom txog thaum tsis muaj roj dim, thiab ces muab tso rau hauv ib qho chaw sov so rau 3h. Tom qab sib tov txias, lim nws, thiab tom qab ntawd ntxiv cov tshuaj ua los ntawm 150ml concentrated sulfuric acid thiab 1.5L dej rau cov khoom. Thaum cov sodium nitrite ntau dhau lawm, lim, ntxuav cov khoom nrog dej, thiab tom qab ntawd ntxuav nrog me me ntawm ethanol. Crude qhuav1,3, 5-tribromobenzeneyog xim av xim av, melting point 112 ~ 116 degree, yield 250 ~ 260g, yield 74% ~ 7.

Electrochemical synthesis yog ib qho kev sib txuas ntawm ib puag ncig thiab muaj txiaj ntsig zoo uas tuaj yeem siv los ua ke ntau yam organic tebchaw, suav nrog Tribromobenzene. Cov nram qab no yog cov ncauj lus kom ntxaws cov kauj ruam thiab sib npaug tshuaj sib npaug rau electrochemical synthesis ntawm Tribromobenzene:
1. Ua ntej ua
Ntxiv cov khoom siv raw xws li benzene thiab ferric bromide rau lub lauj kaub tawg, thiab ntxiv cov kuab tshuaj tsim nyog, xws li ethanol lossis acetone.
Thaum tshav kub kub rau qhov tsim nyog kub kom yaj tag nrho cov ntaub ntawv raw.
Lim cov tshuaj yaj kom tshem tawm cov khoom tsis muaj dej tsis huv.
2. Cov tshuaj tiv thaiv electrolytic
Hloov cov tshuaj lim dej mus rau hauv lub cell electrolytic thiab ntxiv cov khoom tsim nyog ntawm electrolyte (xws li lithium bromide).
Siv ncaj qha tam sim no rau cov tshuaj tiv thaiv electrolysis, tswj tam sim no ceev thiab cov tshuaj tiv thaiv kub.
Thaum cov txheej txheem electrolysis, Tribromobenzene tsim los ntawm cov tshuaj tiv thaiv yuav tso rau ntawm electrode.
3. Kev sib cais thiab kev huv
Tom qab cov tshuaj tiv thaiv electrolysis tiav, yaj cov Tribromobenzene ntawm cov electrode nrog cov kuab tshuaj tsim nyog.
Lim cov tshuaj yaj kom tshem tawm cov khoom tsis muaj dej tsis huv.
Cais cov tshuaj lim los ntawm distillation lossis crystallization kom tau txais high-purity Tribromobenzene.
4. Kev sib npaug tshuaj
Hauv electrochemical synthesis, benzene thiab bromine tau txais cov tshuaj tiv thaiv electrochemical los ua Tribromobenzene. Qhov kev sib npaug tshuaj lom neeg tshwj xeeb yog raws li hauv qab no:

C₆H₆+ 3Br₂ → C₆H₃Br₃+ 3HBr

Qhov kev sib npaug no sawv cev rau kev hloov pauv cov tshuaj tiv thaiv ntawm benzene thiab bromine hauv cov tshuaj tiv thaiv electrochemical, uas ua rau muaj cov Tribromobenzene thiab hydrobromic acid. Nws yuav tsum tau muab sau tseg tias qhov sib npaug no tsuas yog ib qho schematic sawv cev, thiab cov txheej txheem tshuaj tiv thaiv tiag tiag yuav koom nrog lwm cov khoom nruab nrab thiab cov tshuaj tiv thaiv nyuaj.

1,3, 5-tribromobenzene, raws li cov khoom sib xyaw uas muaj peev xwm nqus tau UV muaj zog, yog dav siv los ua UV absorber hauv cov khoom xws li tshuaj pleev thaiv hnub, tshuaj pleev ib ce, thiab yas. Peb bromine atoms nyob rau hauv nws cov qauv molecular muab nws zoo nplaim retardant zog, thiab yog li ntawd nws kuj yog siv raws li ib tug nplaim retardant, tshwj xeeb tshaj yog nyob rau hauv lub teb ntawm polymer cov ntaub ntawv thiab cov khoom siv hluav taws xob.
1. UV absorber
(1) Tshuaj pleev thaiv hnub thiab tshuaj pleev ib ce: Nws yog ib qho zoo UV absorber dav ntxiv rau tshuaj pleev thaiv hnub thiab tshuaj pleev ib ce. Nws tuaj yeem nqus tau ultraviolet rays los ntawm lub hnub ci, txo qhov kev puas tsuaj ntawm ultraviolet rays rau ntawm daim tawv nqaij, thiab tiv thaiv cov tawv nqaij los ntawm tshav ntuj thiab kev laus. Hauv tshuaj pleev thaiv hnub, nws feem ntau yog siv ua ke nrog lwm cov tshuaj pleev thaiv hnub los muab kev tiv thaiv hnub ci ntau dua.
(3) Cov khoom yas: kuj siv rau hauv cov khoom yas los txhim kho lawv lub peev xwm tiv thaiv UV aging. Los ntawm kev ntxiv Tribromobenzene rau cov yas, nws tuaj yeem nqus tau cov kab hluav taws xob ultraviolet los ntawm tshav ntuj, ua rau cov txheej txheem kev laus ntawm cov yas, thiab txuas ntxiv lawv lub neej kev pab.
(4) Fiber thiab ntaub: Nws kuj tseem siv tau rau hauv fibers thiab ntaub los txhim kho lawv cov UV tiv thaiv. Los ntawm kev ntxiv cov tshuaj no rau cov fibers lossis cov ntaub, nws tuaj yeem tiv thaiv lawv los ntawm kev cuam tshuam ntawm ultraviolet rays thiab txuas lawv lub neej kev pab cuam.
2. nplaim retardants
(1) Polymer cov ntaub ntawv: Raws li nplaim taws retardants, lawv tau dav siv nyob rau hauv cov ntaub ntawv polymer xws li plastics, roj hmab, coatings, thiab lwm yam. Vim nws cov ntsiab lus bromine atom siab, nws muaj cov nplaim hluav taws zoo, uas tuaj yeem txo cov combustion ntawm polymer. cov ntaub ntawv thiab txhim kho lawv cov nplaim retardant kev ua tau zoo.
(2) Cov khoom siv hluav taws xob: Hauv kev tsim cov khoom siv hluav taws xob, cov nplaim hluav taws yuav tsum tau txhim kho lawv txoj kev nyab xeeb. Raws li cov nplaim hluav taws zoo, nws tau siv dav hauv kev tsim khoom siv hluav taws xob. Nws tuaj yeem txo qhov kev sib tsoo ntawm cov khoom siv hluav taws xob, txhim kho lawv cov nplaim hluav taws xob ua haujlwm, thiab xyuas kom muaj kev nyab xeeb ntawm cov khoom siv hluav taws xob.
(3) Aerospace teb: Aerospace teb muaj qhov xav tau siab heev rau cov khoom siv kev nyab xeeb, yog li nws yuav tsum tau siv cov nplaim hluav taws kub hnyiab nrog cov nplaim hluav taws zoo heev. Raws li cov nplaim hluav taws muaj txiaj ntsig zoo, nws tau siv dav hauv cov ntaub ntawv hauv aerospace thiab tuaj yeem ua tau raws li cov kev cai nruj rau kev nyab xeeb kev ua haujlwm hauv daim teb no.
(4) Kev tsim kho thaj chaw: Cov khoom siv hauv kev tsim kho yuav tsum muaj cov nplaim hluav taws zoo ua haujlwm kom muaj kev nyab xeeb ntawm lub tsev. Raws li cov nplaim hluav taws kub hnyiab, nws tau siv dav hauv kev tsim cov khoom siv hauv tsev, uas tuaj yeem txhim kho qhov hluav taws kub ntawm cov tsev thiab ua kom muaj kev nyab xeeb ntawm tib neeg lub neej thiab khoom.

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